Red, White, and Golden Currants: An Introduction to the Crop

Family and Genus

All currant species, including gooseberries, belong to the family Grossulariaceae (Mill.). In some older classifications, they are included within the larger Saxifragaceae family, but modern systematics places them in their own family (Bowling, 2000; Dan'kov, 2015). The genus that unites all these plants is Ribes L. It comprises about 150 species found in the temperate and cold regions of the Northern Hemisphere, as well as in South America. In practical horticulture, the representatives of several subgenera are of greatest importance (Dan'kov, 2015).

Red and White Currant

Red and white currants are, botanically speaking, not separate species. They are varieties or cultivar groups within a single polymorphic species, referred to in the literature under various names. Most often it is designated as:

• Ribes rubrum L. — red currant (or northern currant).
• Ribes vulgare Lam. — common currant.
• Ribes sativum Syme — garden currant.

The origin of modern red and white currant varieties is complex. Their gene pool includes genes from several wild species, primarily:

• Red currant (Ribes rubrum L.) — a European species.
• Rock currant (Ribes petraeum N. Pavl.) — distinguished by more vigorous growth and large clusters.
• Common currant (Ribes vulgare Lam.) — served as the basis for many cultivated forms (Dan'kov, 2015).

The main point for the gardener to remember is that red and white currants are variations of the same species. The main difference between them is the content of sugars and pigments. Red currant berries contain anthocyanins, which give them their bright color and more acidic taste. White currant is a natural mutation of red currant, lacking coloring pigments. It contains more sugars and fewer acids, so its flavor is more delicate and sweeter (Buckingham, 2010). In terms of growth biology, fruiting, and cultivation requirements, these two forms are identical.

Golden Currant

Golden currant is a separate species, differing from red and black currants much more significantly. Its botanical name is Ribes aureum Pursh.

This species is distinguished by a number of characteristics:

• Origin: native to North America, unlike the Eurasian red and black currants.
• Appearance: bushes are more robust, with characteristic golden-yellow fragrant flowers gathered in long clusters (Krivko, 2014). The leaves are shaped similarly to gooseberry leaves, lack the characteristic "currant" scent, and turn brilliant colors in autumn.
• Fruit: small, spherical, varying in color from amber-yellow to dark brown and almost black (Krivko, 2014). The taste of the berries is sweeter, with a distinctive flavor reminiscent of black currant but without its specific aroma.

Related Species and Hybrids

In the context of red and golden currants, several important points should be mentioned:

1. Dikusha (Ribes dikuscha Fisch.) — a Siberian species closely related to black currant, used in breeding to enhance winter hardiness and disease resistance.

2. Gooseberry (Grossularia Mill.) — the closest relative, with which currants can cross. An example of such crosses is jostaberry (Ribes nidigrolaria) — an intergeneric hybrid of black currant, gooseberry, and spreading currant (Krivko, 2014).

3. Ribellaria — another gooseberry-currant hybrid of interest for breeding (Dan'kov, 2015). However, red and golden currants are less frequently used in such hybrids.

Takeaways for the Gardener

• Red and white currants are essentially the same species with different berry color and taste. Their cultivation and biology are absolutely identical.
• Golden currant is a separate species with different ecological preferences (drought tolerance, heat tolerance) and growth characteristics.
• Knowing these differences is critically important: what works for red currant in the temperate zone may be useless for golden currant in the steppe, and vice versa. We will discuss variety selection and suitable conditions in the following chapters.

General Habit (Appearance)

All currant species are perennial deciduous shrubs. Unlike trees, they lack a main trunk. The above-ground part consists of several skeletal branches (stems) of different ages that grow annually from the base of the bush. These branches are called basal shoots or zero-order shoots (Dan'kov, 2015; Kurennoi et al., 1985).

• Red and white currants: form bushes 1.2 to 2 meters tall. The bush shape can be compact, upright, or spreading, depending on the variety. Shoots are straight, without spines (unlike gooseberries). Bark on young shoots is light brown or grayish, on older shoots it is gray-brown and peeling (Krivko, 2014; Tarasov et al., 1981).
• Golden currant: a more vigorous and taller shrub, reaching 2–2.5 meters or more in height (Krivko, 2014). Bushes are more open. Young shoots have a characteristic golden-yellow hue, which gave the species its name. Perennial branches are grayish. Buds on shoots are less conspicuous than those of red currant.

Root System

Understanding the root structure is key to understanding the crop's requirements for soil and water.

• Red currant: has a powerful, deep-penetrating root system. The bulk of the roots are in the 30–40 cm soil layer, but individual vertical roots can go down to 1.5–2 meters (Kurennoi et al., 1985; Dan'kov, 2015). Due to this, red currant is more drought-tolerant than black currant and better withstands moisture deficits.
• Golden currant: the root system is even more powerful and deep, making this species the most drought-tolerant of all currants. It can extract moisture from deep soil layers, allowing the plant to survive even in steppe conditions (Krivko, 2014).

Important for the gardener: The deep root system of red and golden currants means they are less demanding of frequent watering, but very sensitive to soil compaction. Deep loosening and digging around the root zone can damage the roots, so soil cultivation should be done carefully, to a depth of no more than 8–10 cm (Bowling, 2000).

Leaves

Leaves are one of the most noticeable features distinguishing different currant species.

• Red currant: leaves are large, 3–5-lobed, with large teeth along the margin. The upper surface is dark green and dull, the lower surface is lighter, sometimes with slight pubescence along the veins. The characteristic "currant" scent of red currant leaves is faint or absent (Tarasov et al., 1981).
• White currant: leaves are practically indistinguishable from red currant.
• Golden currant: the leaves more closely resemble gooseberry leaves — they are rounded or ovate, with 3–5 lobes, but with blunter teeth. The leaf blade is dense, leathery, glossy, bright green. There is no characteristic currant scent. In autumn, the leaves turn brilliant orange-red or yellow, making the bush exceptionally ornamental (Krivko, 2014).

Flowers and Flowering

Currants are insect-pollinated crops (bees, bumblebees). The flowers are bisexual and self-fertile, allowing for a harvest even when planting a single variety. However, cross-pollination increases yield and berry quality.

• Red currant: flowers are small, inconspicuous, yellowish-green or reddish-brown, gathered in drooping clusters 8–12 cm long. Blooms in late April–May, simultaneously with or slightly before leaf emergence.
• White currant: flowers just like red currant.
• Golden currant: flowers are large, bright yellow, with a strong pleasant fragrance, gathered in erect clusters of 5–12 flowers. Blooms later than red currant, in May–June, and is highly decorative. Due to the long calyx tube, it is pollinated mainly by insects with long proboscises (bumblebees, some bee species) (Krivko, 2014).

Fruits and Fruiting

The main interest for the gardener is the berries.

• Red currant: berries are bright red, spherical or slightly oval, up to 1 cm in diameter. They are gathered in long, showy clusters (10–20 berries). The skin is thin but tough, the flesh is juicy, tart, with many small seeds. The berries hold firmly to the clusters and do not fall off when ripe (Buckingham, 2010).
• White currant: berries are creamy white, amber, or pinkish, sweeter and more delicate in flavor than red ones. They are similar in size and shape to red currants.
• Golden currant: berries are smaller (up to 0.8–1 cm), spherical, varying in color from amber-yellow to cherry-red and dark purple, almost black. The skin is dense. They ripen in August, often unevenly on the same cluster. The taste is sweet-tart, with a light muscat flavor reminiscent of black currant. The berries tend to shatter after ripening, so they need closer attention (Krivko, 2014).

Lifespan and Longevity

• Productive period of the plantation: for red and white currants, it is 10–15 years, and with good care can reach 18–20 years (Kurennoi et al., 1985). Golden currant can bear fruit for up to 15–20 years (Krivko, 2014).
• Longevity of a skeletal branch: for red currant, it is 5–8 years (branches aged 2–5 years are most productive). Old branches (older than 6–8 years) produce small berries and should be removed. In golden currant, skeletal branches live up to 6–7 years, but their peak productivity is at 2–5 years (Tarasov et al., 1981).

Thus, when establishing a currant plantation, the gardener should understand: he is planting a perennial crop that will produce harvests for more than ten years. However, to maintain high productivity, regular rejuvenation will be required — replacing old branches with new, young shoots growing from the root. We will discuss how to do this correctly in the sections on pruning and bush formation.

4.1. Temperature Requirements (Winter Hardiness and Frost Tolerance)

This is one of the most important factors determining the cultivation range.

• Red and white currants: These are exceptionally winter-hardy crops. They can withstand frosts down to -35…-40 °C (Kurennoi et al., 1985). Mature bushes overwinter well even in harsh regions (Siberia, the Urals, Northwest Russia) under a thick layer of snow. The main danger for them is not severe frosts but late spring frosts, as red currant begins blooming early, sometimes in late April–early May (Bowling, 2000). Flowers can be damaged at temperatures of -2…-4 °C, leading to crop loss (Buckingham, 2010). However, flower buds of red currant are more resistant to frost than those of black currant.

• Golden currant: This is also a very winter-hardy species, tolerating frosts down to -35 °C (Krivko, 2014). However, it is more heat-loving during the growing season. Unlike red currant, which grows well in cool climates, golden currant thrives in regions with hot, dry summers and cold winters (sharply continental climate). Spring frosts are less dangerous for it, as it blooms later — in May–June (Krivko, 2014). It is also worth noting that golden currant can be damaged by winter thaws followed by frosts in regions with unstable snow cover, especially young shoots (Krivko, 2014).

Takeaway for the gardener: Red and white currants are suitable for most regions with cold winters, but require protection from spring frosts (e.g., choosing a site on elevated ground where cold air does not stagnate). Golden currant is an ideal choice for southern and steppe regions with hot summers and dry climates, where black currant suffers from heat.

4.2. Moisture Requirements (Moisture-loving and Drought Tolerance)

This is the second key factor that separates these species.

• Red and white currants: These species are less demanding of moisture than black currant, but are still moisture-loving crops. Thanks to their deep root system, they can draw water from lower soil horizons, making them more drought-tolerant (Kurennoi et al., 1985). However, to form large and juicy berries, they require regular, moderate watering. During dry periods (especially when berries are filling), watering is necessary. At the same time, they cannot tolerate waterlogging or stagnant water — roots may rot. The optimal soil moisture level is 70–80% of full field capacity (Kurennoi et al., 1985).

• Golden currant: This is the most drought-tolerant of all currants (Krivko, 2014). It is well adapted to hot and dry climates. Its powerful, deep root system allows it to withstand long periods without watering. In the conditions of southern Russia and the steppe zone, golden currant is one of the few berry crops capable of consistently fruiting without irrigation (Krivko, 2014). However, it does respond to watering in dry years, producing larger and sweeter berries.

• Air humidity: For red currant, moderate air humidity is preferred. Intense heat and dry winds, even with sufficient soil moisture, can cause leaf scorching and reduce yield (Kurennoi et al., 1985). Golden currant, on the other hand, is resistant to dry air, thanks to the dense cuticle and pubescence of its leaves (Krivko, 2014).

Takeaway for the gardener: Red and white currants are best planted where watering is possible, especially during dry periods. They are ideal for regions with temperate climates and adequate rainfall. Golden currant is the choice for gardeners in arid regions (steppes, the south) where irrigation is unavailable or limited.

4.3. Light Requirements (Sun-loving)

All currant species are sun-loving plants. Although they can tolerate partial shade, full sunlight is required for a good harvest of sweet, large berries.

• Red and white currants: they fruit well only in sunny, open locations. In shade, berries become smaller, more acidic, yields drop, and bushes are more susceptible to diseases and pests. Moreover, in sunlight, red currant berries accumulate more sugar and ripen faster (Buckingham, 2010).
• Golden currant: also extremely sun-loving. In shade, it barely fruits, although it may retain its ornamental value. For a harvest, it needs full sun (Krivko, 2014).

Takeaway for the gardener: Plant currants in the sunniest spot on your property. Avoid low-lying areas where cold air stagnates (this is especially important for red currant, as protection from spring frosts). Light midday shade may be acceptable in very hot southern regions to protect leaves from scorching, but not at the expense of sunlight.

4.4. Soil Requirements

• Red and white currants: prefer fertile, loose, well-drained soils. They grow best on light and medium loams, as well as sandy loams with good water-holding capacity (Kurennoi et al., 1985; Krivko, 2014). Optimal pH is 6.0–7.0 (slightly acidic or neutral). They grow poorly on heavy, clayey, as well as highly acidic, waterlogged, or drying sandy soils.
• Golden currant: is the least demanding of soils. It can grow on rocky, gravelly soils, on slopes of ravines, and also tolerates slight salinity (Krivko, 2014). Optimal pH is 6.0–7.5. On poor but well-drained soils, golden currant performs better than on heavy, waterlogged clays.

Takeaway for the gardener: If you have heavy, clayey, or acidic soil, red currant will require serious soil preparation (adding sand, organic matter, liming). Golden currant will forgive more mistakes.

Summary Table: Ecological Preferences

Cultivation Regions (Brief Overview)

• Red and white currants: optimal for regions with temperate or cool climates and adequate moisture (Northwest, Central Russia, the Baltic States, Northern Europe). In southern regions with hot and dry climates (e.g., the steppes of Kuban, the Lower Volga region), these species suffer greatly from heat and dry air, so their cultivation is only possible with regular irrigation and the selection of tolerant varieties (Krivko, 2014; Dan'kov, 2015).
• Golden currant: ideal for southern, steppe, and arid regions (the North Caucasus, Crimea, Central Asia, southern Siberia), where it is the main currant species in commercial and amateur horticulture (Krivko, 2014). In northern regions with short summers, it can also be grown, but may not fully ripen and produce lower yields due to its longer growing season.

Now that we know each of these crops requires specific conditions, in the next chapter we will examine exactly how they grow and develop, so that our agronomic actions are informed and timely.

5.1. Life Cycle of the Bush

Currant is a perennial shrub, but each individual branch (stem) has its own limited lifespan. The whole bush is a community of branches of different ages.

• First year: A basal shoot (zero-order shoot) grows from a bud at the base of the bush. It actively grows in length and thickness but does not flower.
• Second and third years: This shoot begins to branch. Flower buds are formed on its lateral growths and on fruiting structures (spurs, fruit twigs). Fruiting begins.
• Peak productivity: For red and white currants, the greatest yield comes from branches aged 3–5 years (Tarasov et al., 1981). Golden currant is most productive on branches 2–5 years old (Krivko, 2014).
• Aging: After 5–6 years (for golden currant, after 6–7 years), branch growth weakens, berries become smaller, and yield declines. Old branches gradually die off.
• Renewal: At the same time, new vigorous basal shoots grow annually from dormant buds at the base of the bush, ensuring continuous fruiting for many years (up to 15–20 years).

Key takeaway for the gardener: The currant harvest is the result of the work of shoots from the last 2–5 years. Therefore, the main task in pruning is to regularly remove old branches (older than 5–6 years), making room for young ones that will produce the main harvest in the future.

5.2. Annual Development Cycle (Phenology)

Understanding the sequence of development phases helps to apply fertilizers, water, and treatments on time.

1. Start of vegetation: In spring, when the average daily temperature rises above +5…+8 °C, buds swell. In red currant, this period occurs early, right after snowmelt.

2. Flowering: Red and white currants bloom in late April–May, often before the leaves fully unfold (Kurennoi et al., 1985). Golden currant blooms later — in May–June (Krivko, 2014). The flowering period lasts 10–15 days. Flowers are bisexual, self-fertile, but cross-pollination yields a higher harvest and larger berries.

3. Shoot growth and bud formation: Active shoot growth begins in May and continues until mid-summer. By the end of June–early July (depending on the region), shoot growth slows down. This is a critical moment! At the end of July–August, red and white currants undergo differentiation (formation) of flower buds on the current year's growth and on fruiting structures (Tarasov et al., 1981). These buds will provide next year's harvest.

4. Berry ripening: In early varieties, berries ripen 60–70 days after flowering. For red currant, this is usually late June–July (Buckingham, 2010). Golden currant ripening is stretched — from mid-July to August (Krivko, 2014).

5. Preparation for winter: After harvest and the cessation of shoot growth (August–September), the plant accumulates nutrients, shoots mature (lignify), and the dormant period begins.

Key takeaway for the gardener: The most important period for forming the future harvest is late July–August. At this time, flower buds are laid in red and white currants. If the plants experience a lack of moisture or nutrients during this period, next year's harvest will be poor. Ensure adequate watering and fertilization at this time (Bowling, 2000).

5.3. Types of Buds and Fruiting Structures

To prune currants correctly, one must distinguish between types of buds and know where berries form.

• Growth buds (vegetative): Only shoots (leaves, branches) grow from them. They are smaller and pointed.
• Flower buds (generative): Flowers and berries develop from them. They are more rounded and larger.

5.4. Types of Fruiting (Comparison)

5.5. Types of Shoots

It is important to distinguish basal shoots from lateral shoots:

• Basal shoot — grows from a bud at the base of the bush (from underground). This is the future new stem.
• Lateral shoot — grows from a bud on a previous year's or older shoot.

Key takeaway for the gardener: In red and white currants, pruning is aimed at:

1. Annual removal of 2–3 of the oldest branches (older than 5–6 years) right at the base.

2. Removing weak and overcrowding shoots.

3. Leaving 2–3 of the strongest basal shoots each year to replace the old ones.

For golden currant, the pruning logic is similar, but it should be remembered that it tends to produce fewer basal shoots, so replacing old branches should be stimulated by timely pruning (Krivko, 2014).

Understanding these physiological foundations is the key to proper care. In the next chapter, we will discuss what all this is ultimately for: the chemical composition of the berries and their benefits.

6.1. General Chemical Composition

All currant species contain a complex of substances typical of berry crops:

• Sugars: Mostly glucose and fructose. Content ranges from 5 to 17%, depending on the species, variety, and growing conditions (Bowling, 2000; Dan'kov, 2015).
• Organic acids: Malic, citric, and tartaric acids give the berries a refreshing tart taste. Their content ranges from 1 to 3% (Dan'kov, 2015). It is these acids that define the characteristic "currant" flavor.
• Pectin substances: Present in significant amounts, especially in red currants (up to 0.5–1.2%). Due to pectins, the berries gel well, making them ideal raw material for jams, jellies, and preserves (Bowling, 2000).
• Vitamins: Currants are a known vitamin concentrate. Vitamin C (ascorbic acid), vitamin P (rutin), B vitamins (B1, B2, B9 — folic acid), provitamin A (carotene), vitamin E (tocopherol), and vitamin K.
• Micro- and macroelements: Potassium, calcium, magnesium, phosphorus, iron, as well as manganese, zinc, copper, iodine (especially in black currant, but also present in red) (Dan'kov, 2015).
• Biologically active substances: Anthocyanins (coloring pigments), catechins, leucoanthocyanins, tannins (have anti-inflammatory and astringent properties) (Krivko, 2014).

6.2. Comparative Characteristics of Species

6.3. Medicinal and Preventive Properties

Regular consumption of all currant species has a pronounced positive effect on the body:

• Strengthening the cardiovascular system: Vitamin P (rutin) and anthocyanins strengthen capillary walls, make them more elastic, reducing the risk of varicose veins and hypertension. Red currant is recommended for kidney diseases and for strengthening blood vessels (Dan'kov, 2015).
• Boosting immunity: Ascorbic acid (vitamin C) stimulates the immune system, helps the body fight infections, especially during the spring vitamin deficiency period (Bowling, 2000).
• Normalizing digestion: Pectins help eliminate toxins and heavy metal salts, improving intestinal peristalsis. Organic acids stimulate appetite and gastric secretion.
• Diuretic and anti-inflammatory action: Currants are recommended for edema, kidney diseases, and urinary bladder issues (due to potassium and organic acids) (Dan'kov, 2015).
• Antioxidant protection: Carotene (in golden currant), catechins, and anthocyanins neutralize free radicals, slowing the aging process and reducing the risk of cancer (Krivko, 2014).
• Anti-cold action: The berries (especially as fruit drinks and compotes) have diaphoretic and antipyretic effects, helping with colds and flu.

6.4. Culinary Uses

• Fresh berries: White and golden currants can be eaten fresh due to their sweetness. Red currant is more often used as an addition to salads, desserts, or as a sour note in sauces.
• Jams, preserves, jellies: Due to the high pectin content, especially in red currant, the jam becomes jelly-like. For white currant jam, apples or other berries are often added to improve texture.
• Compotes and fruit kissels: All species make refreshing compotes and fruit kissels that can be preserved for winter.
• Freezing: Currants freeze well, retaining all their beneficial properties. Frozen berries can be used for baking, sauces, and compotes.
• Drying: The berries are dried for making vitamin teas and decoctions (especially useful for the winter period).

Gardener's tip: If you plan to process the harvest, pay attention to varieties with high pectin content (for jellies) or varieties with sweeter berries (for fresh consumption). Variety selection is largely determined by how you plan to use the berries.

Thus, red, white, and golden currants are not just garden ornaments but valuable berry crops that can meet both culinary and medicinal-preventive needs. By growing them, you gain access to a useful product practically year-round in various processed forms. In the next chapter, we will summarize and determine in which regions and conditions each of these crops will thrive best.

7.1. General Growing Principles

Before discussing regional specifics, it is important to understand the basic principles common to all currant species:

1. Choosing the right location: A sunny, wind-protected site without stagnation of cold air (especially important for red currant, which blooms early). Groundwater should be no closer than 1.0–1.5 m from the surface.

2. Soil preparation: The soil is prepared in advance (2–3 months before planting). Organic fertilizers (manure, compost) and phosphorus-potassium fertilizers are applied. Acidic soils are limed (optimal pH 6.0–7.0). Digging depth is 30–40 cm (Kurennoi et al., 1985).

3. Planting: The best time is autumn (September–October) or early spring. Saplings are planted with the root collar buried 5–7 cm to stimulate the formation of additional roots and basal shoots (Kurennoi et al., 1985).

4. Pruning: The main principle is to form a bush of 12–15 branches of different ages, regularly removing old (older than 5–6 years) and weak shoots. Detailed pruning schemes are described in specialized guides (Bowling, 2000; Buckingham, 2010).

5. Watering and fertilizing: Currants are demanding of moisture and nutrients. Regular watering, especially during flower bud formation (late July–August), and annual fertilization with mineral fertilizers are the keys to abundant harvests.

However, these general principles can vary greatly depending on the region. Let's examine this in more detail.

7.2. Red and White Currants: Comfort Zone

7.3. Golden Currant: Comfort Zone

7.4. Summary Table: Growing Strategy by Region

7.5. Practical Selection Recommendations

1. If you have a hot, arid region (south, steppes):

• Your choice is golden currant. It will grow without problems and produce good harvests even without watering. If you want red currant, be prepared for regular watering and choose special drought-tolerant varieties.

2. If you have a cool, humid region (Northwest, Center, Baltic States):

• Your choice is red and white currants. They will feel at home. Golden currant is also possible, but for a stable berry harvest, more effort and an early-ripening variety are needed.

3. If you have a severe but snowy winter (Siberia, Urals):

• Both red and golden currants are sufficiently frost-hardy. But for golden currant in Siberia, it is essential to choose early varieties to ensure berries ripen in the short summer.

4. If you have limited space or want to grow currants in containers:

• Red and white currants are relatively compact and grow well in containers (Buckingham, 2010). Golden currant is more vigorous, so for container growing, it is better to choose dwarf forms or be prepared for larger container volumes.