Strawberries

The Journey from Forest to Garden

The history of the strawberry spans several millennia. Wild species of this plant have been known to humans since ancient times. There is evidence that they were gathered and consumed in Ancient Rome and Greece (Husaini & Zaki, 2016). However, it entered cultivation relatively late. Until the 18th century, Europe primarily grew two species: the woodland strawberry (Fragaria vesca) and the musk strawberry, or hautbois strawberry (Fragaria moschata). Their fruits were aromatic but small (Darrow, 1966).

A turning point in its history came in 1714 when a French officer, Amédée-François Frézier, brought five plants of the local large-fruited Chilean strawberry (Fragaria chiloensis) from Chile (Rieger, 2010). These plants were planted in the Paris Royal Garden next to another American species, the Virginia strawberry (Fragaria virginiana), which had been introduced from North America a century earlier (Bowling, 2000).

The accidental cross-pollination of these two species produced surprising offspring — a hybrid that combined the large fruit size of the Chilean strawberry with the superior flavor and high yield of the Virginia strawberry (Sharma et al., 2019). This hybrid, named Fragaria × ananassa (the pineapple strawberry), became the ancestor of all modern large-fruited varieties. Since then, breeders around the world have continuously worked to improve this plant, creating varieties for a vast range of climatic conditions and needs (Rieger, 2010; Hill & Perry, 2011).

Strawberry or Garden Strawberry? What is Correct?

This is perhaps the most frequently asked question among gardeners. In everyday language, we often call large garden berries "strawberries." From a scientific point of view, however, this is incorrect.

• Garden Strawberry (Fragaria × ananassa) — This is what we grow in our gardens. It is the hybrid described above. Plants of this species generally have hermaphroditic flowers, ensuring good self-pollination (Kurennoi et al., 1985).
• Hautbois Strawberry (Fragaria moschata) — This is a completely different species. Its fruits are generally smaller, have a distinct musky aroma, and often have unisexual flowers, meaning they require male pollinator plants for fruit set (Dankov, 2015; Kirtbaya & Shcheglov, 2003).

Thus, when you buy or grow large, juicy berries, you are dealing with the garden strawberry. The name "strawberry" is botanically incorrect for them but is widely used in colloquial speech. In this article, we will adhere to the scientific name — garden strawberry.

Modern Distribution

Today, the garden strawberry is one of the most widespread berry crops in the world. It is grown almost everywhere: from tropical highlands to subarctic regions (Cornell Guide, 2003). The largest producers are China, the USA, Turkey, Spain, Mexico, and Egypt (Mandal et al., 2021). This has been made possible by the vast diversity of varieties that can be adapted to a wide range of conditions — from the hot, humid climate of the south to the cold winters of temperate zones.

Family and Genus

Our protagonist — the garden strawberry (Fragaria × ananassa) — belongs to the large and noble family Rosaceae (Rieger, 2010; Potapov et al., 2000). This family also includes apples, pears, cherries, raspberries, as well as ornamental roses. All of them are united by the characteristic structure of the flower. The genus to which the strawberry belongs is called Strawberry (Fragaria L.). This Latin name comes from the word fragans, meaning "fragrant," and perfectly characterizes the aroma of its fruits (Sharma et al., 2019).

Species Diversity: From Diploids to Octoploids

In the wild, there are about 20–30 species of strawberries, scattered across the Northern Hemisphere: in Eurasia, North, and South America (Gambardella & Sánchez, 2016; Staudt, 1999). Their main difference is the number of chromosomes, i.e., ploidy. This may sound complicated to a gardener, but in practice, it determines many important properties.

• Diploid species (2n = 14): These are the most ancient and widespread species. They include the well-known woodland strawberry (Fragaria vesca). This is what our ancestors gathered in the forests. Its main advantages are an unsurpassed aroma and high frost resistance. It is widely used in breeding to transfer these qualities to new varieties (Dankov, 2015; Gambardella & Sánchez, 2016). This group also includes the green strawberry (Fragaria viridis).
• Hexaploid species (2n = 42): This is the musk strawberry, or hautbois strawberry (Fragaria moschata). Its fruits are small but possess a strong musky aroma. This species is often confused with the garden strawberry, but as we established in the first chapter, they are different botanical species (Kirtbaya & Shcheglov, 2003). Musk strawberry is dioecious (having male and female plants) and low-yielding, so it is not grown on a commercial scale.
• Octoploid species (2n = 56): These are the "youngest" and most evolutionarily advanced species, which gave rise to all modern large-fruited varieties. There are two main representatives:

1. Virginia Strawberry (Fragaria virginiana) — native to North America. Valued for its high yield, excellent flavor, and disease resistance.

2. Chilean Strawberry (Fragaria chiloensis) — originates from South America (Chile). It gave modern varieties their main gift — large fruit size (Rieger, 2010; Sharma et al., 2019).

Our Garden Beauty: Fragaria × ananassa

As we already know, our garden strawberry is not a natural species but a man-made hybrid resulting from the crossing of two octoploid species: F. virginiana and F. chiloensis (Husaini & Zaki, 2016). This is why its scientific name includes the multiplication sign "×" — Fragaria × ananassa. This hybrid inherited the best from its parents: large fruit and aroma from the Chilean, and yield, hardiness, and flavor from the Virginia. Its octoploid nature (the presence of eight sets of chromosomes) provides genetic flexibility, which has allowed breeders to create a huge number of diverse varieties — from small, super-early ones to large, firm-fleshed ones.

Why Should a Gardener Know Taxonomy?

This is not dry science but a practical key to success. Understanding the origin of a species will help you:

1. Choose the right variety. If your region is known for harsh winters, you will look for varieties with the "genes" of frost-resistant F. virginiana or F. vesca. If you live in a warm climate and want to get extra-large berries, your choice will be among varieties where the genes of F. chiloensis dominate.

2. Understand breeding principles. Knowing that different species easily crossbreed makes it clear how new varieties with unique properties emerge — for example, everbearing, disease-resistant, or with white fruits.

3. Distinguish between plants. Now you will know exactly why the "strawberry" in the store is actually a garden strawberry, and you won't confuse it with the true hautbois strawberry, which is rarely found in cultivation.

Taxonomy is not just a boring classification but a fascinating story about the plant's journey around the world and its evolution, the result of which we see today in our garden beds.

Root System: The Key to Water Supply and Nutrition

The roots of the strawberry are its "pump" and "foundation." It has a fibrous root system, consisting of many thin roots that do not penetrate very deeply into the soil. The bulk of the roots (up to 80–90%) are found in the upper 15–30 cm layer of soil, although individual roots can go down to a depth of 70–100 cm (Bowling, 2000; Mandal et al., 2021; Kurennoi et al., 1985).

What does this mean for the gardener?

• Shallow location means that strawberries are very sensitive to drought and nutrient deficiencies. Regular watering and fertilization are mandatory.
• Increased demand for soil looseness and air permeability. Roots develop poorly in dense, clayey soils where there is little oxygen.
• An important feature: roots form on the stem (crown) and grow higher each year. Old roots die off, and new ones appear higher up the stem. Over time, the plant seems to "climb" out of the ground, and this must be taken into account when hilling or adding soil to the base of the bushes (Bowling, 2000; Hill & Perry, 2011).

Stem (Crown): The Heart of the Plant

Strawberries do not have a regular stem. Instead, they have a shortened and thickened stem called the crown or rootstock (Agustí, 2010; Trunov et al., 2012). This is the central part of the plant, from which leaves, runners, and flower stalks emerge. Buds form in the leaf axils on the crown. From these, either new crowns (branching of the bush), flower stalks, or runners develop. The number of crowns determines the vigor of the bush and its future yield. The more crowns, the more flower stalks and, consequently, berries (Sharma et al., 2019).

Practical conclusion: When planting, it is important not to bury or expose the crown. It should be strictly at ground level. Burying it will lead to rot, while exposing it will lead to desiccation and death of the plant (Hill & Perry, 2011; Cornell Guide, 2003).

Leaves: The Food Factory

Strawberry leaves are trifoliate, meaning they consist of three leaflets on a long petiole (Bianchi, 2018; Rieger, 2010). They live for a relatively short time — about 60–90 days — after which they die off and are replaced by new ones (Tarasov et al., 1981). Over a season, 2–3 generations of leaves can be replaced.

Why is this important to know?

• Leaves are the main organ of photosynthesis, meaning they produce sugars and other organic substances that are used for the growth of roots, leaves, runners, and the filling of berries.
• The first wave of leaf growth occurs in spring. These leaves support flowering and fruit set.
• The second wave occurs after the harvest. These leaves are vital for the formation of flower buds for the next year (Kurennoi et al., 1985; Kirtbaya & Shcheglov, 2003). Therefore, immediately after harvesting the berries, you should not mow the leaves — only if there is a need for sanitary treatment and after the harvest is fully collected. Abundant and healthy foliage in autumn is the key to a good harvest in the next season.

Runners (Stolons): A Tool for Propagation

Runners are modified stems that creep along the ground. They form daughter rosettes (new small plants). This is the main method of vegetative propagation of strawberries in nature and in gardens (Bianchi, 2018; Rieger, 2010). A plant can produce up to 30 runners with dozens of rosettes per season (Tarasov et al., 1981).

What should a gardener do with runners?

• If you need new plants for renovation or expanding the plantation, leave the strongest rosettes (usually the first order, closer to the mother plant), press them into the soil to root, and cut the runner to separate them from the mother plant.
• If the goal is fruit, runners are competitors. They take away strength from the mother plant needed for forming large berries. Therefore, it is recommended to remove them regularly, especially in the first year after planting for mother plants (Hill & Perry, 2011; Cornell Guide, 2003). This will increase yield and fruit quality.

Flowers and Fruits: The Main Result

In most modern strawberry varieties, flowers are bisexual (hermaphroditic), meaning that one flower contains both stamens (male organs) and pistils (female organs). This ensures good self-pollination (Agustí, 2010; Mandal et al., 2021). However, cross-pollination by insects (bees, bumblebees) significantly increases the yield and quality of berries (Hill & Perry, 2011).

The most important botanical fact: what we eat is not a berry in the botanical sense. It is a false fruit, or an aggregate accessory fruit. The true fruits are the small brown seeds (achenes) located on the surface of the enlarged, fleshy receptacle (Husaini & Zaki, 2016; Rieger, 2010). Each of these seeds is the result of fertilization of an individual pistil. If a seed is not fertilized, the tissue underneath it does not grow, and the fruit becomes deformed ("misshapen") (Rieger, 2010). Therefore, good pollination is critically important for obtaining uniform and large berries.

Brief Practical Takeaways from Botany:

1. Watering and nutrition should be frequent and regular, as the roots are shallow.

2. Proper planting — without burying or exposing the crown (stem).

3. Do not remove leaves immediately after harvest — they are needed for bud formation for the next year.

4. Remove runners if you are not planning propagation, so that plants focus their energy on berries.

5. Attract bees and bumblebees to the garden during flowering to get uniform and large fruits.

Understanding these simple but fundamental features of strawberry structure will help you become a true master in its cultivation. In the next chapter, we will move on to environmental requirements — what this plant needs for a happy and productive life in your garden.

Light: The Main Driver of Yield

Strawberries are a sun-loving crop. This is one of the most important requirements. To get an abundant harvest of large, sweet berries, they need at least 6–8 hours of direct sunlight per day (Bowling, 2000; Hill & Perry, 2011). In shade or partial shade, plants become elongated, produce fewer runners, bloom weakly, and the berries become small, sour, and late (Kirtbaya & Shcheglov, 2003; Trunov et al., 2012).

Practical conclusion: Choose the most open and sunny spot in the garden for the strawberry bed. Avoid areas near tall trees, fences, or buildings that may cast shade for at least part of the day. Morning sun is especially valuable because it quickly dries dew on the leaves, reducing the risk of fungal diseases (Bowling, 2000).

Temperature: A Balance Between Cold and Heat

Strawberry is a temperate climate plant, but its temperature preferences change depending on the development phase.

• Optimum temperatures for growth and fruiting: For active growth and photosynthesis, the most favorable range is +18…+25 °C during the day and around +12…+15 °C at night (Mandal et al., 2021). At higher temperatures (above +30 °C), growth slows down, pollen becomes sterile, berries become smaller, and may suffer from sunburn (Yamdagni & Sharma, 2019; Bianchi, 2018).
• Frost resistance: At rest, strawberries are quite frost-hardy. Their roots can withstand short-term frosts down to –8 °C, and the above-ground part down to –15 °C, but only under reliable snow cover (Kurennoi et al., 1985; Trunov et al., 2012). Without snow, root death can occur even at –10 °C. Snow is the best natural "insulator." A layer of 20–25 cm reliably protects plants during frosts down to –30 °C and below.
• Spring frosts: This is the main danger to the future harvest. Flowers and young ovaries are very sensitive to returning cold snaps. Critical temperatures:
• Buds: –2…–5 °C.
• Open flowers: –1…–2 °C.
• Ovaries: –1 °C (Agustí, 2010; Bowling, 2000; Kurennoi et al., 1985).

Practical conclusions:

1. Site selection. To protect against spring frosts, choose locations on slight elevations where cold air drains downward rather than stagnating (Bowling, 2000). Lowlands and enclosed basins are the worst places for strawberries.

2. Snow retention. In regions with harsh and low-snow winters, ensure snow accumulation on the beds — use shields, brushwood, or simply don't trample the snow.

3. Frost protection. During flowering, keep an eye on the weather forecast. If frost threatens, use covering material (spunbond, agrotex) or sprinkler irrigation (turn on a fine spray for the whole night). By the way, straw mulch that you removed in spring may be useful for emergency covering.

Moisture: Where is the Golden Mean?

Strawberries are a moisture-loving crop but cannot tolerate stagnant water. Waterlogging leads to a lack of oxygen in the soil, causing root death and the development of root rots (phytophthora, verticillium) (Rieger, 2010; Cornell Guide, 2003).

• Soil moisture: The optimum soil moisture is 70–80% of field capacity (Kurennoi et al., 1985; Kirtbaya & Shcheglov, 2003). During critical periods (flowering, fruit filling), the need for moisture increases to 80–85%. Lack of water at this time leads to the shedding of ovaries and small berries. Overwatering is equally harmful.
• Air humidity: In dry and hot regions (southern Russia, Mediterranean climate), increased air humidity reduces stress from overheating (Kirtbaya & Shcheglov, 2003). In conditions of dry winds, leaves suffer from dehydration, which affects the yield. Therefore, in arid zones, irrigation and mulching are especially important.

Practical conclusions:

1. Irrigation. The best irrigation method is drip irrigation, which delivers water directly to the roots and does not spray it on the leaves, reducing the risk of diseases (Rieger, 2010; Mandal et al., 2021). Water infrequently but deeply, wetting the soil to a depth of 20–30 cm. The frequency of watering depends on the weather and soil type. A guideline: sandy soils need more frequent watering, clay soils less often but more abundantly.

2. Mulching. This is a key technique for maintaining soil moisture. Straw, peat, compost, or black plastic film (in industrial systems) reduce evaporation, protect roots from overheating and overcooling, and also prevent berries from contacting the ground, keeping them clean and healthy (Cornell Guide, 2003; Hill & Perry, 2011).

Soils: Choosing the Right Foundation

Strawberries are not too fussy about soil, but there is a "gold standard" worth striving for.

• Mechanical composition: The best soils are light and medium loams, sandy loams with a high content of organic matter (humus) (Bianchi, 2018; Mandal et al., 2021). They should be loose, permeable to water, and aerated. Heavy clay soils, as well as overly light sandy soils, require significant improvement.
• Acidity (pH): Strawberries prefer slightly acidic soils with a pH of 5.5–6.5 (Bianchi, 2018; Bowling, 2000; Hill & Perry, 2011). On alkaline soils (pH > 7), chlorosis (yellowing of leaves) often develops due to iron deficiency. On very acidic soils (pH < 5.0), plants are stunted and absorb phosphorus and calcium poorly.
• Structure and drainage: Roots cannot tolerate waterlogging and lack of oxygen. Good drainage is essential. If the soil is heavy and prone to waterlogging, the only solution is planting on raised beds (Cornell Guide, 2003; Rieger, 2010).

Practical conclusions:

1. Conduct a soil test. This is the most reliable way to determine its acidity and the content of essential elements (phosphorus, potassium, magnesium). If the pH is not in the optimal range, it is adjusted: to increase pH (deacidify), add dolomite lime or agricultural lime; to decrease it (acidify), add sulfur or peat.

2. Improve the structure. Add organic matter — compost, well-rotted manure, peat. This improves both heavy soils (making them looser) and light sandy soils (increasing their water-holding capacity).

3. Ensure drainage. If the area is wet, raise the beds to a height of 20–30 cm. This will save the roots from waterlogging and many diseases.

To summarize: the ideal site for strawberries is a sunny place protected from cold winds on a slight elevation with loose, slightly acidic, fertile soil. In the next chapter, we will analyze the physiological processes that govern the life of this remarkable plant.

Annual Development Cycle: The Strawberry Calendar

The life of a strawberry is not just continuous growth but a sequence of clearly defined phases. Understanding this cycle is the basis of all agronomic practices.

1. Autumn-winter dormancy. With the onset of short days and decreasing temperatures (below +5…+7 °C), the plant enters a state of dormancy (Bianchi, 2018; Potapov et al., 2000). Shoot and leaf growth ceases. During this period, tissue hardening occurs and nutrients accumulate in the roots and crown for the coming spring. In a state of deep dormancy, strawberries are most frost-hardy (Yamdagni & Sharma, 2019). Disturbance of dormancy (e.g., prolonged winter thaws) reduces frost resistance.

2. Spring awakening and growth. As soon as the soil warms up to +5…+8 °C, sap flow begins, and the plants "wake up" (Kurennoi et al., 1985). New leaves begin to grow. This is the first, most powerful wave of growth, which ensures future flowering. Nutrients for this stage are drawn from reserves accumulated in the roots and crown since autumn. Therefore, it is so important not to allow the plant to become depleted in the fall.

3. Flowering and fruit set. Flowering begins approximately 25–30 days after the start of the growing season and lasts from 10 to 30 days depending on the variety and weather (Mandal et al., 2021; Agustí, 2010). First, the flowers of the primary order bloom (the largest, which will produce the largest berries), then the secondary, tertiary, and so on (Rieger, 2010). This extended flowering is an adaptation that protects against spring frosts: if the first flowers die, the second and third ones may still produce a crop, albeit a smaller one (Potapov et al., 2000). From pollination to the ripening of the first berries takes about 30 days (Kurennoi et al., 1985).

4. Fruiting. The period from the start of ripening to the complete harvest lasts on average 2–4 weeks (Mandal et al., 2021). During this time, all the plant's energy is directed towards filling the berries. This is the most critical period in terms of water supply and nutrition. After harvesting, the plant is weakened and needs recovery.

5. Second wave of growth (summer-autumn). This is perhaps the most important but often underestimated stage. After fruiting, active growth of new leaves and runners begins (Kurennoi et al., 1985). It is these leaves that will photosynthesize in late summer and autumn, ensuring the formation of flower buds for the next year's crop (Tarasov et al., 1981). It is at this time that the future harvest is laid! Therefore, care after berry picking (watering, fertilizing, removal of runners if not needed) is just as important as care before flowering.

Flowering and Fruiting: Controllable Processes

Our idea that strawberries are just "self-growing" berries is not entirely true. In fact, their physiology can and should be managed.

• Photoperiodism. The ability of strawberries to form flower buds depends on the length of daylight (Rieger, 2010). This is a key factor determining when your plant will bear fruit. This is the basis for the classification of strawberries into two main groups, which we will discuss in detail in Chapter 7.
• The role of the achenes. Each achene (true seed-fruit) is a small factory for producing hormones (auxins) that stimulate the growth of the surrounding receptacle tissue (Mandal et al., 2021). If an achene does not form (poor pollination), the flesh underneath it will not grow. This explains why poorly pollinated berries have a deformed shape — in places where there are few seeds, the flesh simply does not develop (Rieger, 2010). This is another argument for the importance of good pollination.
• Uneven ripening. Within a single inflorescence, berries do not ripen simultaneously: first the primary, largest one, then the smaller ones (Rieger, 2010). Therefore, harvesting usually takes place in several stages (e.g., every other day), which allows picking berries at the optimal stage of ripeness.

Dormancy and Cold: A Necessary Period

For normal development and abundant flowering, strawberries require a dormancy period with a certain number of chill hours (temperature below +7 °C) (Yamdagni & Sharma, 2019). Different varieties have different requirements. Varieties bred for southern regions require less cold (less than 500 hours), while those for northern regions require more (over 800–1000 hours) (Agustí, 2010; Rieger, 2010).

Why is this important? If a variety with high chill requirements is planted in a warm climate, it will flower and fruit poorly because it will not undergo the necessary vernalization stage. Conversely, a low-chill variety in a cold climate may start growing too early and be damaged by late spring frosts. Therefore, choosing a variety suitable for your region is critically important.

Why Does a Gardener Need to Know All This?

1. Care in different phases. You will understand why you cannot immediately forget about the bed after harvesting — that's where the next year's crop is being formed.

2. Irrigation planning. You will know exactly when moisture is critically important (during the flowering and fruit-filling phases).

3. Understanding the difference between varieties. You will be able to consciously choose between strawberries that produce one large harvest and those that fruit all summer, depending on your goals.

4. Protection from stress. Hot weather during flowering or fruiting is not just unpleasant — it is physiologically damaging to the plant, as it disrupts the processes of pollination and fruit filling. Protection from overheating (shading, watering) becomes a scientifically based necessity.

In the next chapter, we will discuss the chemical composition of the berries and what we are actually cultivating them for.

Main Components: Sugars, Acids, and Water

The strawberry fruit consists of 89–91% water (Mandal et al., 2021; Sharma et al., 2019). This explains its juiciness and why it quickly loses turgor and spoils. The remaining part is dry matter, which determines the taste, aroma, and nutritional value.

• Sugars (4–10%): These are the main sources of energy and sweetness. The main sugars are glucose, fructose, and sucrose (Mandal et al., 2021). The ratio between them determines the perception of sweetness. Fructose is sweeter than glucose, so berries with high fructose content seem sweeter even with a lower total sugar content.
• Organic acids (0.8–1.3%): They give the berries their characteristic tartness. The main acid is citric acid (Mandal et al., 2021; Husaini & Zaki, 2016). Malic and quinic acids are also present. The ratio of sugars to acids (the sugar-acid index) is one of the main indicators of taste. It is this ratio, not the absolute sugar content, that determines whether the berry tastes sweet or sour to you.
• Fiber (dietary fiber): The fiber content is about 2% (Mandal et al., 2021). This is an important component for digestion, providing a feeling of fullness and promoting normal bowel function.

What does this mean for the gardener? The taste of the berry depends not only on the variety but also on the growing conditions. More sun → more sugars. More water before picking → more acids and a watery taste. Therefore, if you want sweet berries, give the plants maximum sunlight and do not overwater them shortly before harvest.

Vitamins and Antioxidants: The Main Value

Strawberries are rightfully considered one of the most beneficial berries. Their value is due to their high content of vitamins and biologically active compounds.

• Vitamin C (ascorbic acid): This is the main vitamin in strawberries. On average, they contain 50–120 mg of vitamin C per 100 g of berries, which is more than oranges or lemons (Husaini & Zaki, 2016; Mandal et al., 2021). Vitamin C is a powerful antioxidant that strengthens the immune system, protects cells from damage, and improves iron absorption. Just 100–150 g of fresh berries cover the daily requirement of an adult for this vitamin.
• B vitamins: The berries contain vitamins B1 (thiamine), B2 (riboflavin), B9 (folic acid) (Dankov, 2015; Husaini & Zaki, 2016). Folic acid is especially important for blood formation and nervous system health. In terms of folic acid content, strawberries rank among the top fruits.
• Vitamin E (tocopherol): Present in small amounts but plays an important role as an antioxidant, protecting cell membranes.
• Vitamin K: Involved in the blood clotting process.
• Carotenoids (provitamin A): Present in the form of beta-carotene, though in small amounts (Husaini & Zaki, 2016).

Why is this important? Strawberries are not just a dessert. Regular consumption of fresh berries helps strengthen the immune system, improve skin and blood vessel condition, and serves as a preventive measure for many diseases associated with vitamin deficiencies.

Phenolic Compounds: The Power of Color and Aroma

This is the most interesting and valuable group of substances, which gives strawberries not only their bright color but also powerful beneficial properties. It is phenolic compounds that are currently attracting the most attention from researchers.

• Anthocyanins: These are pigments responsible for the red, pink, and purple color of the berries. Besides coloring, they are powerful antioxidants. The main anthocyanin in strawberries is pelargonidin-3-glucoside (Husaini & Zaki, 2016). The intensity of the berry color is directly related to the amount of anthocyanins.
• Ellagic acid and ellagitannins: These are among the most studied and valuable components of strawberries. They have pronounced antioxidant, anti-inflammatory, and antimutagenic properties (Husaini & Zaki, 2016; Rieger, 2010). This explains the interest in strawberries as a product capable of reducing the risk of developing certain types of cancer. Ellagic acid is also known for its antibacterial and antiviral properties.
• Flavonoids (quercetin, kaempferol): These substances have a wide range of biological activities: they strengthen the walls of blood vessels, have an anti-inflammatory effect, and protect cells from oxidative stress (Husaini & Zaki, 2016).

Practical conclusion: The brighter and more intense the color of the berry, the more anthocyanins it contains. Varieties with intense color are generally healthier, but this does not always mean they are sweeter. It is the combination of these complex organic substances that gives strawberries the status of a "functional food" — a product that not only satisfies hunger but also provides clear health benefits (Husaini & Zaki, 2016).

Mineral Composition: Building Material

Strawberries contain a wide range of macro- and microelements that are essential for normal body function (Mandal et al., 2021; Sharma et al., 2019).

• Potassium (about 150–160 mg/100 g): One of the most important elements, regulating water-salt balance and the function of the cardiovascular system.
• Calcium and magnesium: Important for bone tissue, nervous system, and muscle function.
• Iron: Necessary for blood formation. Although its content is not very high, it is well absorbed thanks to the presence of vitamin C.
• Manganese: Plays an important role in metabolism.
• Iodine, copper, zinc, and selenium: Present in microscopic doses but perform important functions in the immune system and metabolism.

Practical Takeaways for the Gardener:

1. Health value. Strawberries are a tasty and accessible way to improve your health. They can be recommended as a dietary product, beneficial for the heart, immunity, and overall vitality.

2. Freshness is paramount. Many biologically active substances (especially vitamin C and anthocyanins) are destroyed during storage and heat treatment. The most valuable product is fresh berries picked at peak ripeness.

3. Harvest timing. Pick berries in dry, clear weather, after the dew has dried. Berries picked in rain or damp weather spoil faster and lose some of their beneficial properties.

4. Varieties. Different varieties have different chemical compositions. Varieties with dark red, rich color usually contain more anthocyanins. Processing varieties may have higher acidity.

5. Don't store for long. Strawberries are a perishable product. They are best eaten immediately after picking. For long-term storage, freeze the berries — this allows you to preserve most of the beneficial substances.

In the next chapter, we will move from the composition of the berries to the classification of the plants themselves. We will analyze what types of strawberries exist so that you can consciously choose varieties for your purposes.

7.1. The Main Division: By Fruiting Type (Photoperiodism)

This is the most important and fundamental classification, which determines when and for how long your strawberry will bear fruit. It is based on the plant's physiological response to day length (photoperiod), which we discussed in Chapter 5 (Rieger, 2010).

7.2. Classification by Ripening Time

Within June-bearing varieties, there is an additional division by ripening time: early, mid-early, mid-season, mid-late, and late (Agustí, 2010; Hill & Perry, 2011). This allows you to select varieties so that you can harvest sequentially, extending the season.

Practical value: By planting varieties of different ripening times, you can stretch the harvest period from 2-3 weeks to 5-6 weeks (Bowling, 2000). This is a sensible strategy for a home garden. For example, you can plant an early variety for the first berries, a mid-season variety for the main harvest, and a late variety to finish the season.

7.3. Classification by Purpose

Different varieties are created for different purposes. This is also important to consider when choosing (Bianchi, 2018; Hill & Perry, 2011).

• Dessert (table): Berries have excellent flavor, aroma, and juiciness. They often have a more delicate texture. These varieties are ideal for fresh consumption but may be poorly suited for long-term storage and transport.
• Processing (industrial): Berries are firmer, with thicker skin, often more acidic. They store well, tolerate transport, and are ideal for freezing, processing (jam, jellies), and making juices.
• Dual-purpose: The golden mean — good taste combined with firm flesh. Suitable for both fresh consumption and processing.

7.4. Classification by Growing Method

Although this is not a botanical classification, it is important for planning your garden.

• For open field: Most varieties are suitable for open-field cultivation. Consider their adaptability to your climate.
• For protected cultivation (greenhouses, tunnels): There are varieties, especially early ones, specifically created for growing under plastic to produce an extra-early harvest (Bianchi, 2018; Agustí, 2010). They are characterized by rapid development and the ability to set fruit under less favorable conditions.
• For vertical gardening (pots, containers, pyramids): Day-neutral varieties are the ideal choice for containers, hanging baskets, and pyramids, as they provide long-lasting fruiting in a limited space (Hill & Perry, 2011; Bowling, 2000).

7.5. Brief Summary: Navigator for Varieties

Understanding this classification is your first step to the right choice. In the next chapter, we will answer the most important practical question: how to choose from this diversity exactly what is right for you and your garden.

Step 1. Ask Yourself: "What Harvest Do I Want?"

This is the most important question that divides all gardeners into two main camps.

• Option A: "I want one, but very abundant harvest".
• u are suited for June-bearing strawberry varieties. This is the classic choice for those planning to preserve (jam, compotes, freezing) or sell berries. You will get a powerful wave of harvest consisting of large, aromatic berries, but this period will be relatively short (2–4 weeks) (Hill & Perry, 2011; Bowling, 2000).

• Option B: "I want to eat fresh berries all summer".
• en your choice is day-neutral strawberry. It will provide you with berries from spring until autumn frosts, offering a continuous treat (Bowling, 2000). The berries will be smaller, and care more intensive, but the result is worth it. This option is ideal for fresh family consumption (Cornell Guide, 2003).

Practical advice: There is nothing wrong with "not choosing." Many experienced gardeners combine both types. For example, 3–4 beds of June-bearing varieties for preserves and 1 bed of a day-neutral variety for the "dessert" table.

Step 2. Know Your Region's Climate

This is a decisive factor determining whether the plant survives and bears fruit.

The main secret is "chill requirement." Remember from Chapter 5 that to form flower buds, strawberries need a certain number of hours with temperatures below 7 °C? That's the chill requirement. It is more pronounced in June-bearing varieties (Agustí, 2010; Rieger, 2010).

• For cold and temperate climates (northern regions, Siberia, Ural): Choose varieties with a high chill requirement. They will not wake up too early, protecting them from spring frosts. This also applies to choosing day-neutral varieties — check if they are adapted to your region (Cornell Guide, 2003).
• For warm climates (southern Russia, subtropics): Your choice is varieties with a low chill requirement. Varieties bred for the north may not flower at all in a mild winter, as they do not receive the required chilling. This is critically important for getting a harvest (Rieger, 2010).

Practical advice: The most reliable way is to consult local nurseries or experienced gardeners in your region. The best varieties for your area have already been tested there over time. Also, look for USDA hardiness zone information in variety descriptions. It will help you understand if the variety is generally suitable for your climate.

Step 3. Decide Where and How You Will Grow

Your choice of variety also depends on the planting site.

• Open field: Suitable for the vast majority of varieties. The main thing is to ensure good sunlight and proper care.
• Greenhouses and tunnels: For protected cultivation, early June-bearing varieties are often chosen. This allows for an extra-early harvest that will fetch a higher market price. Some day-neutral varieties also do well in greenhouses, as temperature can be regulated (Bianchi, 2018).
• Containers, balconies, vertical beds: The clear leader here is the day-neutral strawberry. It provides long-lasting fruiting in a limited space. Its plants are more compact and look great in hanging baskets (Hill & Perry, 2011; Bowling, 2000).

Step 4. Prioritize Variety Traits

At this stage, you have already narrowed down to a specific group (June-bearing or day-neutral, suitable for your climate and growing method). Now it's time to consider taste preferences.

• Taste: Dessert varieties are usually sweeter and more aromatic. Processing varieties are more acidic but store better. If you eat berries mostly fresh, choose dessert types. If you plan to do a lot of processing, a processing variety might be more convenient (Bianchi, 2018).
• Disease resistance: This will save you time and nerves. When choosing a variety, pay attention to its resistance to the main diseases in your region, especially gray mold (Botrytis cinerea) and powdery mildew (Sphaerotheca macularis) (Bowling, 2000; Cornell Guide, 2003).

Step-by-Step Selection Guide

1. Step 1. Determine your type: "one big harvest" or "berries all summer".

2. Step 2. Study your region's climate (chill requirement) and select a suitable "northern" or "southern" variety within your group.

3. Step 3. Decide where you will plant (open field, greenhouse, container).

4. Step 4. Ask local nursery growers what they recommend. Choose 2–3 varieties that combine good flavor and disease resistance.

5. Step 5. Experiment! Plant 5–10 plants of two or three different varieties as a trial. After a year or two, you will see what grows best for you. This is much more reliable than blindly trusting catalog descriptions.

Conclusion: Your Path to Success

Choosing a variety is a fascinating and creative endeavor. In this article, we have tried to provide you with a navigator that will help you navigate the world of catalogs and offers. Choose wisely, focus on your climate and goals, and your strawberry bed will surely reward you with an abundant and delicious harvest.

Good luck on your gardening journey! Remember that even the best variety requires care and attention. In future articles, we will explore in detail how to properly care for strawberries in different climatic zones.