Watering

The Root System – The Main Reason

Strawberry roots are shallow. The bulk of the roots (up to 90%) are located in the topsoil – just 15–20 centimeters from the surface (Mandal et al., 2021; Sharma et al., 2019). In dry weather, this layer dries out the fastest, and the roots simply cannot reach the moisture stored deeper.

What this means for the gardener: Strawberries cannot "wait" for rain like plants with deep taproots. If you don't provide regular watering during dry spells, the harvest will suffer.

Leaves Breathe and Evaporate Water

On the underside of strawberry leaves, there are many stomata – microscopic openings through which the plant breathes and evaporates moisture. The stomatal density in strawberries is very high (Mandal et al., 2021). This means that on a hot day, they lose water faster than many other crops.

Why this matters: At the peak of summer heat, strawberries can experience water stress even when the soil moisture is adequate – simply because evaporation through the leaves is too intense.

Berries Are Mostly Water

Ripe strawberry fruits consist of more than 89% water (Mandal et al., 2021). When moisture is lacking, the plant cannot "fill" the berries with juice – they remain small, dry, and lose their marketable appearance.

The Dangers of Water Scarcity

The consequences of water deficit appear at all stages:

• After planting: roots do not establish, plants get sick and may die (Bianchi, 2018).
• During growth: leaves become smaller, development slows down.
• During flowering: fruit set decreases, some flowers may drop.
• During berry filling: fruits become small, dry, and lose sugar content (Westwood, 1993; Sharma et al., 2019).

The Dangers of Excess Water

Overwatering is equally harmful:

• Roots suffocate without oxygen (Hill & Perry, 2011).
• The risk of root rots (Phytophthora, Verticillium) and gray mold of berries (Botrytis cinerea) increases (Mandal et al., 2021).
• Berries become watery, lose flavor, and store poorly.
• In waterlogged conditions, diseases are activated – especially on heavy, clay soils (Westwood, 1993).

The Golden Rule

The strawberry root system must be in moist, but not waterlogged, soil. Air in the soil is as important for the roots as water. Therefore, the gardener's task is not just to water, but to create conditions where moisture is supplied regularly, without stagnation.

In the next chapter, we will look at how much water strawberries need at each stage of development – from planting to harvest.

2.1. Establishment (After Planting)

This period determines whether the planting will survive and lay the foundation for future harvests.

What happens to the plant:

After transplanting, the root system is severely damaged. Strawberries cannot efficiently take up water until new absorbing roots grow. Meanwhile, the leaves continue to evaporate moisture, and if it is not replenished, the plant dries out.

Watering recommendations:

• In the first week after planting, water twice a day – in the morning and evening, using 40–50 m³ of water per hectare (approximately 4–5 liters per 1 m² per watering) (Bianchi, 2018).
• Watering should be frequent and in small amounts to keep the topsoil layer (10–15 cm) constantly moist, but without water pooling at the crown.
• In hot and windy weather, increase the frequency of watering; in cloudy and humid weather, reduce it.

Important:

During this period, sprinkler irrigation works best – a fine spray of water moistens not only the soil but also the leaves, reducing overheating and evaporation (Bianchi, 2018). However, as soon as the plants start to grow, it is better to stop sprinkler irrigation (see Chapter 4).

2.2. Leaf Growth and Vegetative Development

After establishment, active leaf and runner growth begins. At this time, the plant builds the "factory" for producing sugars that will feed the berries.

What happens to the plant:

A powerful leaf canopy is formed. The larger and healthier the leaves, the greater the future yield. This requires stable moisture in the root zone.

Watering recommendations:

• Maintain soil moisture at 70–75% of field capacity (Potapov et al., 2000; Sharma et al., 2019).
• Depending on the weather, water 1–2 times a week, wetting the soil to a depth of 20–25 cm.
• On light sandy soils, water more frequently (but with smaller amounts); on clay soils, water less often but more abundantly.

Consequences of errors:

• Lack of water → leaves become smaller, growth slows down, fewer flower buds are set.
• Excess → water stagnation, triggering root rots, especially on heavy soils (Westwood, 1993).

2.3. Flowering

Flowering is a short but very sensitive stage. It determines how many ovaries will turn into berries.

What happens to the plant:

Flowers need sufficient moisture for pollination and fertilization. Under water stress, some flowers dry up, and ovaries drop. Moreover, fungal diseases are particularly dangerous at this time, developing under high humidity and with droplets on the flowers.

Watering recommendations:

• Maintain soil moisture at about 75% of field capacity (Potapov et al., 2000; Sharma et al., 2019).
• Watering should be moderate, without overwatering.
• Sprinkler irrigation is strictly forbidden during flowering: water on the flowers interferes with pollination (washes away pollen) and promotes the development of gray mold (Botrytis cinerea) (Bianchi, 2018; Mandal et al., 2021).

Best method:

Drip irrigation or furrow irrigation (if beds are formed), so that water reaches only the roots, while leaves and flowers remain dry.

2.4. Fruit Formation and Filling

This is the most critical stage from a watering perspective. This is where berry size, juiciness, and flavor are determined.

What happens to the plant:

Strawberries are almost 90% water (Mandal et al., 2021). Fruit filling requires a huge amount of moisture. If strawberries experience water deficit during this period, the berries will be small, dry, with lower sugar content and higher acidity.

Watering recommendations:

• Maintain soil moisture at 80% or more of field capacity (Potapov et al., 2000; Sharma et al., 2019).
• In hot weather, increase watering frequency to 2–3 times a week, especially on light soils.
• Watering rate – ensure water penetrates the soil layer at least 20–25 cm, where the bulk of the roots are concentrated.

Important:

Avoid sharp fluctuations in moisture – from dryness to overwatering. This can cause fruit cracking and reduce their shelf life (Westwood, 1993).

Consequences of water deficiency:

• Reduction in berry size by 20–30% or more (Westwood, 1993).
• Deterioration of taste – reduction in sugars and aromatic compounds.
• Increased susceptibility to sunscald.

2.5. After Harvest (Recovery and Bud Initiation)

After harvest, many gardeners mistakenly believe watering can stop. In fact, this is when flower buds for next year's crop are initiated.

What happens to the plant:

Strawberries regenerate their leaf canopy (second wave of leaf growth) and actively form flower buds. This process requires moisture, though less than during berry filling.

Watering recommendations:

• Maintain moisture at up to 75% of field capacity (Potapov et al., 2000).
• In dry autumn, carry out pre-winter irrigation (especially before winter) – so the soil goes into winter with sufficient moisture reserves, and roots do not dry out during thaws.
• Watering frequency – once every 5–7 days depending on the weather.

Consequences of water deficiency:

• Poor flower bud initiation → low yield next year.
• Plants overwinter less well, especially if autumn is dry and frosty.

Summary Table: Soil Moisture by Growth Stage

What Else Affects Water Needs?

The figures given are a guide. Actual needs may vary depending on:

• Soil type: water sandy soils more often, clay soils less often (Sharma et al., 2019).
• Weather: in heat and wind, evaporation is higher – water more frequently.
• Variety: some varieties are more drought-tolerant (e.g., those with deeper root systems), others are more water-demanding (Martinez-Ferri et al., 2016, cited in Mandal et al., 2021).
• Growing method: under plastic or in tunnels, evaporation is less, and watering can be less frequent.

It is less important to follow strict numbers than to learn to "read" your plants and soil – we will discuss this in the next chapter.

3.1. The Most Reliable Method: Soil Feel Test

This method is used even in large farms because it is simple, quick, and sufficiently accurate (Sharma et al., 2019; Potapov et al., 2000).

How to check:

1. Take a handful of soil from under the strawberries at a depth of 5–10 cm (where most of the roots are).

2. Squeeze it in your fist, then open your hand and look at the clod.

What the results mean:

• The clod crumbles in your hand – the soil is too dry. Water immediately! This is a sign that moisture is below 50% of field capacity (Hill & Perry, 2011). Further drying threatens growth arrest and fruit drop.
• The clod holds its shape but crumbles with slight pressure – moisture is about 60–80% of field capacity. This is optimal for most growth stages (Hill & Perry, 2011; Potapov et al., 2000). Watering is not required yet, but check the soil again in 1–2 days.
• The clod is dense, moist, leaves a wet mark on the palm – moisture is close to full (80–100%). Do not water yet. If the clod is too wet and sticky – the soil may be waterlogged, and watering should be postponed until it dries.

Why this works:

The soil changes its structure by touch depending on its water content. This test gives a much better idea of moisture available to the roots than surface inspection, because the top layer may be dry while there is still enough moisture at root depth, or vice versa.

Important nuances:

• On sandy loam and sandy soils, clods form less well – rely on crumbliness.
• For clay soils, the clod may remain dense even when moisture is lacking, so assess not only form but also color (dry clay lightens) and the presence of cracks.
• Check the soil in several spots across the plot, as moisture distribution can be uneven.

3.2. Observing the Plants: Visual Signs

The plants themselves "signal" water deficiency if you watch them carefully.

Signs of water deficiency:

• Leaves lose turgor (droop), especially during the hot hours of the day. If they do not recover by evening, it is a signal.
• Leaf blades become smaller, edges may curl upward.
• Older leaves turn yellow and dry faster than usual (this may be natural aging, but combined with dry weather it indicates water deficit).
• Flowers and ovaries drop prematurely (under severe stress).
• Berries fill slowly, become small and dry.

Signs of overwatering:

• Leaves darken, become limp but not dry.
• Water-soaked spots appear on lower leaves.
• Mold appears on the soil surface, and signs of rot appear at the crown.
• Berries become watery, tasteless, and are easily affected by gray mold.

Important: Some signs (e.g., leaf drooping at noon) can occur even with adequate soil moisture during extreme heat – due to intense evaporation. In that case, check the soil by touch: if it is moist, the plants are fine, and no watering is needed (Potapov et al., 2000).

3.3. Simple Tools for Accurate Diagnosis

For gardeners who want more objective data, there are inexpensive and convenient instruments.

• Tensiometer – measures the force with which the soil holds water (matrix potential). It is placed in the soil at root depth. When the needle shows a certain value (e.g., ‑10…‑15 kPa for strawberries), it is time to water (Sharma et al., 2019). For most amateur gardeners, a tensiometer is overkill, but it is very useful for drip irrigation on large beds.
• Soil moisture meter (electronic or mechanical) – inserted into the soil and shows moisture in percent or arbitrary units. These devices are available at garden centers and provide fairly accurate information for decision-making.

Tip: If you decide to use a device, check its readings alongside the feel test for the first few weeks – this will "calibrate" it to your specific soil.

3.4. Climatic Indicators

Even without instruments, you can rely on the weather and experience:

• In hot and windy weather, strawberries lose moisture faster – be prepared to water more often.
• If less than 20–25 mm of rain has fallen in a week and temperatures exceed +25°C, watering will likely be necessary (Sharma et al., 2019).
• In rainy and cool weather, reduce or even skip watering, especially on heavy soils.

Benchmark: On average, strawberries require about 25–30 mm of water per week (rainfall plus irrigation) during the active period (Sharma et al., 2019). If there is no rain, this amount needs to be supplemented.

3.5. How Often to Check?

• During establishment and fruit filling – check the soil daily or every other day.
• During leaf growth and after harvest – 2–3 times a week is sufficient.
• After rain – check the next day to ensure water reached the roots and did not run off.

The Main Rule

Water not by the calendar, but by the condition of the soil and plants.

Even if the recommendation is to water twice a week, in a rainy June that may be too much, while in a dry May it may be too little. The only reliable guide is the soil itself and the appearance of the plants.

In the next chapter, we will discuss which watering methods are best for strawberries and in which situations each is preferable.

4.1. Drip Irrigation (Micro-irrigation)

This is the most effective and recommended method for strawberries, especially from the flowering phase to the end of fruiting (Bianchi, 2018; Sharma et al., 2019).

How it works:

Water is supplied in small amounts directly to the root zone of each plant through drippers (emitters) or through perforated tubes (drip tapes). The water seeps into the soil, moistening a limited volume where the roots are located.

Advantages:

• Water is used efficiently – evaporation losses are minimal, water does not reach the leaves or run off between rows.
• Leaves and flowers stay dry – this is the main advantage for strawberries, as it reduces the risk of gray mold (Botrytis cinerea) and other fungal diseases (Bianchi, 2018; Mandal et al., 2021).
• Soil does not compact – no strong water pressure that breaks down soil structure.
• Fertigation possible – supplying soluble fertilizers along with irrigation, saving time and increasing fertilizer efficiency (Bianchi, 2018).
• Automation – drip systems can easily be connected to timers, which is especially convenient for busy gardeners.

Disadvantages:

• Higher initial cost of equipment (drip tapes, fittings, filters).
• Requires clean water – small particles and salts can clog drippers, so filtration and periodic flushing are necessary.
• Improper pressure and line length can cause uneven wetting – some plants receive more water, others less (Bianchi, 2018).

When to use:

• Immediately after establishment and throughout the season – especially during flowering and fruit filling.
• On all soil types, but particularly valuable on sandy soils, as it allows frequent application of small amounts, preventing deep moisture loss.
• When growing under plastic or in tunnels – drip irrigation is almost mandatory there.

Practical advice:

Place the drip tape under a layer of mulch or directly under plastic film – this reduces evaporation and protects the tape from UV radiation, extending its service life (Bianchi, 2018; Potapov et al., 2000).

4.2. Sprinkler Irrigation (Overhead Spraying)

This method is familiar to everyone: water is sprayed over the plants through sprinkler heads, mimicking rain.

Advantages:

• Evenly wets the entire soil surface.
• Cools leaves and lowers the temperature around plants in extreme heat.
• Indispensable for the first stage – establishment, when it is important to maintain moisture not only in the soil but also in the air around young leaves (Bianchi, 2018).
• Can be used for frost protection – fine water spray releases heat as it freezes, saving flowers (Bianchi, 2018; Westwood, 1993).

Disadvantages:

• Leaves and flowers get wet, promoting fungal diseases, especially gray mold and powdery mildew (Mandal et al., 2021).
• Water reaches the berries, reducing their shelf life and quality, and can cause sunscald (water droplets act as lenses).
• High losses from evaporation and wind drift, especially in hot weather.
• Can compact the topsoil and create a crust if watering is too intense.

When to use:

• Only in the first few days after planting (1–2 weeks) to aid establishment. After the plants start growing, sprinkling should be stopped or minimized.
• For frost protection during flowering – in this case, it is used deliberately.
• In areas where other systems are unavailable, short early-morning sprinkling can be used so that leaves dry by evening, but this is risky.

Important: During flowering, sprinkling is strictly not recommended – water washes away pollen, interferes with pollination, and significantly reduces yield (Bianchi, 2018; Mandal et al., 2021).

4.3. Surface Irrigation (Furrow or Flooding)

This is the traditional method where water is run over the soil surface, usually along furrows between rows. Sometimes watering into basins around plants is used.

Advantages:

• No complex equipment required – just direct water from a hose or set up ditches.
• Suitable for level plots and heavy clay soils where water absorbs slowly.
• Can be effective in early stages when precise dosing is not required.

Disadvantages:

• Very high water consumption – losses from evaporation and deep percolation reach 30–50% (Bianchi, 2018).
• Uneven wetting – especially on slopes or uneven surfaces.
• Leaves and berries can get dirty from mud splashes.
• Risk of crown waterlogging if water stagnates at the plant base.
• Soil compaction and crust formation upon drying, requiring cultivation.
• High risk of disease spread through water (fungal spores and pathogens can be transmitted).

When to use:

• In small gardens when other options are unavailable – but only during establishment or as a last resort.
• On heavy soils with good drainage and provided water does not stagnate around plants.

How to reduce negative effects:

• Make furrows at some distance from the plants so water does not touch the crown directly.
• After watering, aerate and loosen the topsoil to prevent crusting.
• Use mulching (see next chapter) to conserve moisture and reduce evaporation.

Modern recommendations lean towards surface irrigation for strawberries being a method of the past (Bianchi, 2018). It should be used only as a temporary solution until a drip system is set up.

4.4. Comparison of Methods: Which to Choose?

Recommendation for the Amateur Gardener:

If you are just starting out on a small plot, you can get by with a hose and spray nozzle for the first waterings, but by the flowering phase, we strongly recommend switching to drip irrigation. Affordable ready-made drip irrigation kits for garden beds are available and easy to install without special skills. They pay for themselves through water savings, plant health, and increased yields.

In the next chapter, we will discuss how to retain soil moisture and reduce watering frequency – through mulching and improving soil structure.

5.1. Mulching

Mulch is a layer of organic or inorganic material that covers the soil surface around plants. For strawberries, mulching is not just a useful technique but practically an essential element of cultivation (Bianchi, 2018; Hill & Perry, 2011).

How mulch reduces evaporation:

• Creates a physical barrier between moist soil and dry air.
• Prevents direct heating of the soil by the sun, lowering the temperature of the top layer.
• Reduces wind speed at the soil surface, which would otherwise "pull" moisture away.
• Prevents the formation of a soil crust, through which evaporation is faster.

Types of mulch and their characteristics:

• Straw (wheat, rye) – the classic material for strawberries. It is loose, allows air passage, retains moisture well, and most importantly, prevents berries from touching the soil, protecting them from rot (Hill & Perry, 2011). Use only clean straw, free of weed seeds (not hay!). Layer – 5–10 cm after settling.
• Mown grass (dried) – an accessible material, but it must be dried before laying, otherwise it matts and may rot. Layer – 3–5 cm.
• Compost or well-rotted manure – not only conserves moisture but also feeds the plants. Apply a layer of 2–3 cm. Make sure the compost is fully mature, otherwise it may "burn" delicate roots (Hill & Perry, 2011).
• Sawdust and wood chips – good for between rows, but not for direct contact with plants, as they can tie up nitrogen from the soil during decomposition. If used, compensate with extra nitrogen fertilization.
• Black polyethylene film – most effective at suppressing weeds and conserving moisture. It almost completely blocks evaporation and warms the soil, accelerating spring growth (Bianchi, 2018). However, it does not allow air through and can overheat soil in hot climates, so it is more common in temperate zones or combined with drip irrigation (film is laid before planting, then holes are cut for plants).
• Reflective films (white, aluminized) – reflect sunlight, preventing soil overheating. Used in hot regions or to protect from overheating in tunnels (Bianchi, 2018).
• Biodegradable films – a modern option that decomposes in the soil after 2–3 months, requiring no removal. Currently more expensive than regular film, but convenient for annual crops (Bianchi, 2018).

Practical mulching tips:

• Apply mulch after the soil has warmed up (usually late spring), otherwise it will slow growth.
• The mulch layer should be at least 5 cm for organics and continuous – without bare patches.
• Do not cover the plant crown with mulch – leave a 2–3 cm space around it to avoid rot.
• In autumn, before winter, the mulch layer can be increased – it will protect roots from freezing (Hill & Perry, 2011).

What mulching provides (beyond water savings):

• Suppresses weed growth.
• Berries stay clean and do not rot from contact with soil.
• Smooths out soil temperature fluctuations.
• Organic mulch decomposes over time and fertilizes the soil.

5.2. Agrofabric (Nonwoven Cover Material)

This is a synthetic fabric laid over the bed and secured at the edges. Unlike film, agrofabric is breathable – it allows air and water through, but significantly reduces evaporation.

How it works:

• The material impedes air movement at the soil surface, reducing evaporation.
• It shades the soil (if black) or reflects light (if white), reducing heating.
• Rain and irrigation water pass freely through the fabric to the roots.

Varieties:

• Black agrofabric – most popular. It completely blocks light, suppressing weeds, and warms the soil in spring. Well suited for northern and temperate regions (Potapov et al., 2000).
• White or light agrofabric – reflects sunlight, preventing soil overheating. Used in hot climates or to protect from overheating in summer months (Bianchi, 2018).
• Two-color (black-and-white) – black side down (for weed control), white side up (for light reflection). A universal option.

Advantages over organic mulch:

• Does not need annual renewal – lasts 3–5 years.
• Does not attract rodents and insects (unlike straw).
• Allows water and air through, without creating a greenhouse effect.
• Ideally combined with drip irrigation (tape laid directly under the fabric).

How to use:

• Lay it out on the prepared bed before planting.
• Secure the edges with stones, pegs, or by covering with soil.
• Make cross-shaped or round cuts at planting sites and transplant seedlings.
• The fabric surface may become clogged with dust over time, so occasionally rinse it with water.

Limitations:

• Higher initial cost than straw.
• Under intense solar radiation, black material can overheat the soil, requiring light colors in hot regions.
• Does not decompose; after the season, it must be removed and disposed of (unless biodegradable).

5.3. Improving Soil Structure

Mulch and agrofabric work "from above," but you can also influence evaporation "from within" – by improving the soil structure itself.

Why structure matters:

In well-structured soil, there are both large and small pores. Large pores provide drainage, small pores hold water in capillaries. When structure is disrupted (soil compacted, "sealed," or too loose and sandy), water either drains away too quickly (roots don't have time to use it) or stagnates on the surface and evaporates.

How to improve soil structure to reduce evaporation:

• Adding organic matter (compost, manure) – the main method. Organic matter acts like a sponge: it absorbs water during irrigation and slowly releases it to the roots. At the same time, it binds sandy particles and loosens clay ones, creating an optimal capillary system (Hill & Perry, 2011; Potapov et al., 2000). For strawberry beds, it is advisable to incorporate 5–10 kg of compost per 1 m² (or 50–100 t/ha) before planting.
• Increasing humus content – more humus means higher water-holding capacity. This reduces watering frequency because the soil retains moisture longer (Westwood, 1993).
• Green manures (cover crops) – sowing mustard, oats, phacelia and plowing them into the soil a year before planting strawberries improves structure, increases organic matter, and water-holding capacity (Hill & Perry, 2011).
• Avoid deep digging – frequent deep tillage breaks capillaries and increases evaporation. Surface loosening (5–8 cm) after watering and rain is sufficient to break crusts without disturbing lower capillaries (Potapov et al., 2000).
• Adding sand to clay soil and clay to sandy soil – but this is a long and laborious process. Organic matter works much faster.

Direct effect on watering:

• Well-structured soil retains moisture in the root zone and prevents rapid surface evaporation because water rises through capillaries only when needed by the plant, not continuously.
• When capillary rise occurs, water moves upward, but if the top layer is mulched, surface evaporation is blocked, and moisture remains with the roots.

The Combined Approach – The Best Strategy

In practice, maximum effect comes from combining:

Organic mulch (or agrofabric) + good soil structure + drip irrigation

For example:

• Before planting, incorporate compost (structure).
• Lay drip tape.
• Cover the bed with black agrofabric or mulch with straw.
• In this system, evaporation losses are minimal, and strawberries receive water exactly as needed.

Bottom line: By reducing evaporation, you not only save water but also reduce watering frequency, saving your time and energy. This is especially important during hot periods when every day counts.

In the next and final chapter, we will cover the most common watering mistakes for strawberries and how to avoid them.

6.1. Mistake: Surface Watering – Only Wetting the Top Layer

How it shows: The gardener waters frequently but lightly – just enough to wet the soil surface. As a result, water does not reach the bulk of the roots, which are at 15–20 cm depth.

Why it is harmful: Strawberry roots are shallow, but most are concentrated in the 10–25 cm layer (Sharma et al., 2019). If only the top 2–3 cm are wetted, the roots do not get moisture; they start developing even closer to the surface, becoming more vulnerable to drying out and overheating. Moreover, frequent surface watering promotes soil compaction and weed growth in the top layer (Westwood, 1993).

How to avoid: Water less often but more abundantly, so water penetrates to at least 20–25 cm. Check this by digging down an hour after watering to see the wetting depth. For most soils, this corresponds to 20–30 L/m² per irrigation (or 20–30 minutes of drip irrigation with tape emitting 1.5–2 L/h per emitter). With drip irrigation, adjust duration: for example, at 1.5 L/h per plant and 30 cm emitter spacing, wetting to 25 cm may take 1–2 hours depending on soil type.

6.2. Mistake: Watering During the Hot Afternoon Hours

How it shows: Watering in the middle of the day, when the sun is overhead, especially with sprinklers or a hose with a spray nozzle.

Why it is harmful: Water droplets on leaves act like lenses, focusing sunlight and causing leaf burns (Hill & Perry, 2011). In addition, much of the water simply evaporates before reaching the roots – irrigation efficiency plummets. With drip irrigation in heat, water heated in the pipes can reach roots warm, which is stressful (Westwood, 1993).

How to avoid: Water early in the morning (before 8–9 a.m.) or in the evening (after 6–7 p.m.), when the sun is not intense. Morning watering is preferable because leaves dry before the heat, reducing fungal disease risk. Evening watering is acceptable, but plants remain wet all night, which may promote disease development, especially gray mold (Bianchi, 2018). If using drip irrigation, you can water during heat without burn risk because water does not touch leaves.

6.3. Mistake: Sprinkling During Flowering and Fruiting

How it shows: Using sprinklers or spray nozzles when strawberries are flowering or berries are filling.

Why it is harmful: This is one of the most severe and common mistakes. Water on flowers washes away pollen, hinders pollination, and reduces fruit set (Mandal et al., 2021). Wet flowers and ovaries are ideal for gray mold (Botrytis cinerea), which can destroy 30–50% of the crop (Mandal et al., 2021). Moreover, wet leaves and berries in hot weather are more susceptible to sunscald and leaf spots (Bianchi, 2018; Sharma et al., 2019).

How to avoid: As soon as strawberries begin to flower, switch completely to drip irrigation or very careful root watering from a hose without spraying. If drip is unavailable, pour water into furrows between rows or into basins around bushes, trying not to wet leaves or flowers. If you must use sprinkling (e.g., for frost protection), only do it as a last resort and briefly; otherwise, avoid it until harvest.

6.4. Mistake: Overwatering – "Just to Be Safe"

How it shows: The gardener waters too frequently and abundantly, fearing strawberries will not get enough moisture. The soil is constantly wet or even puddled.

Why it is harmful: Strawberry roots need not only water but also oxygen for respiration. When waterlogged, soil pores fill with water, displacing air, and roots suffocate (Hill & Perry, 2011). In such conditions, root rot pathogens – Phytophthora, Verticillium, Pythium – become active (Sharma et al., 2019). Berries become watery, tasteless, and rot easily even on the plant. Excess moisture also leaches nutrients (especially nitrogen) from the root zone (Westwood, 1993).

How to avoid: Check soil moisture before each watering (see Chapter 3). Allow the topsoil to dry slightly between waterings – this signals air has returned to the roots. On heavy clay soils, intervals between waterings should be longer; on sandy soils, shorter. Remember: strawberries tolerate brief drying better than constant waterlogging.

6.5. Mistake: Sharp Moisture Fluctuations

How it shows: A "feast or famine" pattern – a long dry period followed by heavy watering, or vice versa.

Why it is harmful: Sharp moisture fluctuations cause physiological stress. Berries may crack (especially during filling) because after drought they absorb water rapidly, and the skin cannot cope (Westwood, 1993). Such "yo-yo" conditions weaken plant immunity, making them more susceptible to diseases and pests (Potapov et al., 2000). Flower buds initiated after harvest also suffer from unstable moisture.

How to avoid: Strive to maintain uniform moisture in the root zone throughout the season, especially during flowering and fruit filling. Use mulch (see Chapter 5) to smooth out fluctuations – it prevents soil from drying too quickly and protects against sudden waterlogging after heavy rains. Drip irrigation with an automatic timer is the best way to maintain constant moisture.

6.6. Mistake: Ignoring Weather – Watering After Rain

How it shows: The gardener waters on schedule, ignoring rainfall.

Why it is harmful: Excess water is not just a waste of resources but a direct path to waterlogging with the consequences described. After even a small rain (5–10 mm), the need for watering may decrease for several days, especially if soil is well structured and mulched (Sharma et al., 2019).

How to avoid: Always adjust watering based on actual weather. If it rained, check soil at 10 cm depth – if moist, postpone watering. During rainy periods, intervals may extend to 7–10 days; during dry spells, shrink to 2–3 days. Check forecasts: if rain is expected, you can skip watering the day before.

6.7. Mistake: Watering with Cold Water from a Well

How it shows: Using water directly from a well or borehole, without pre-warming in the sun.

Why it is harmful: Cold water (especially below +10°C) causes temperature shock to roots, slowing their activity and nutrient uptake (Westwood, 1993). This is particularly dangerous when watering on a hot day, when the temperature contrast is greatest. Cold stress weakens plants and can delay growth and flowering.

How to avoid: Fill containers (tanks, barrels, large watering cans) a day before watering to allow water to warm to air or soil temperature. For drip irrigation, this is less of an issue because water flows slowly and warms in the pipes, but at early stages, it is better to use settled, warmed water.

6.8. Mistake: Watering Without Considering Soil Type

How it shows: Applying the same watering rates across different plots, e.g., same for sand and clay.

Why it is harmful: Sandy soils drain water quickly but hold it poorly – so on sand, water more often but in smaller amounts (Sharma et al., 2019). Clay soils, conversely, hold moisture for a long time but absorb slowly – so waterings should be less frequent but with larger amounts, otherwise water will run off and pool.

How to avoid: Know your soil type. If unsure, do a simple test: put some soil in a jar with water, shake, let settle for a day – layers will show the proportions of sand, clay, and organics. Adjust frequency and amount accordingly. On sand – more often (2–3 times a week), lightly; on clay – less often (once every 5–7 days), but enough to wet the entire root zone.

6.9. Mistake: Uneven Watering Across the Plot

How it shows: With manual watering, some plants get more water, others less; with sprinkling, part of the bed may be overwatered, part dry.

Why it is harmful: Uneven watering means some plants suffer from drought (small berries, weak growth) and others from waterlogging (diseases, poor berry quality). The result is a mixed harvest and lower overall productivity.

How to avoid: For manual watering, use markers – e.g., time each plant or use a watering can of known volume. With drip irrigation, check uniformity of water delivery (all emitters should work). If the ground is uneven (sloping), lay drip lines along contour to prevent water running down. With sprinkling, ensure sprinklers cover the entire area evenly, without "dead zones."

6.10. Mistake: Stopping Watering After Harvest

How it shows: As soon as berries are picked, watering stops "until next year."

Why it is harmful: Strawberries do not enter deep dormancy immediately after fruiting. During this period, flower buds for the next season are initiated, runners and new rosettes grow (Hill & Perry, 2011; Potapov et al., 2000). With water shortage, these processes slow down, and the future crop may drop by 20–30% or more. Plants also weaken and overwinter poorly.

How to avoid: Continue moderate watering after harvest in dry weather – maintain soil moisture at 70–75% of field capacity. Frequency can be lower (once every 5–7 days), but do not stop completely until consistent rains or cold weather arrive. In late September – October, definitely carry out pre-winter irrigation (wet soil to 30–40 cm) so plants enter winter with moisture reserves.

Summary Table: Common Mistakes and Solutions

The Main Takeaway from This Chapter – and the Entire Article

Strawberries respond well to proper watering but suffer from mistakes. Observe the soil and plants, water according to need rather than a schedule, and use methods that reduce evaporation. Then your strawberries will reward you with large, juicy, and sweet berries even in a dry summer.