Blackcurrant Pruning and Training

1. Why Blackcurrants Need Pruning and Training

Many amateur gardeners believe that currants, being an undemanding shrub, can bear fruit perfectly well without pruning—and there is some truth to that; you will get a certain number of berries. However, this "self‑management" by nature quickly leads to thickening, smaller berries, reduced yields, and a favourable environment for diseases and pests. Therefore, regular and competent pruning is not a whim but one of the main agronomic practices ensuring the health and productivity of your garden. Let us understand why this is so important, starting from the very basics.

Fundamentals of biology: why branches need replacement

Blackcurrant is a perennial shrub whose above‑ground part consists of branches of different ages. The secret to high yields lies in their ability to regenerate. Basal shoots (often called “zero shoots”) emerge from buds at the base of the bush and grow very vigorously in the first year (Kurennoi et al., 1985; Potapov et al., 2000). It is on these, as well as on second‑ and third‑order branches, that the future crop is set.

However, it is important to remember that the productive life of each branch is limited. Specialists from the I.V. Michurin All‑Russian Research Institute of Horticulture emphasise that in most blackcurrant varieties, the bulk of the crop is formed on two‑, three‑ and four‑year‑old branches, after which their productivity drops sharply (Kurennoi et al., 1985). Branches older than 5–6 years become low‑yielding: their annual growth shortens, berries become smaller, and the crop shifts to the periphery of the bush (Tarasov et al., 1981).

It is precisely this biological cycle—the short productive period of branches—that dictates the need for pruning. Without it, the bush ages, and we lose both quantity and quality of berries.

Practical goals of pruning

Pruning and shaping the bush solve a whole range of tasks:

1. Shaping and rejuvenating the bush. This is the main goal. Annual pruning stimulates the formation of new vigorous basal shoots and promotes timely replacement of old, spent branches. In this way, we constantly rejuvenate the bush and maintain its productivity at a high level. As noted in horticultural manuals, a properly shaped bush should have 15–20 well‑developed branches of different ages (Tarasov et al., 1981).

2. Sanitary function. Regular removal of weak, broken, diseased and dried branches is a crucial sanitary measure. It prevents the spread of diseases (e.g., anthracnose or powdery mildew) and pests (such as currant bud mite or clearwing moth), which often settle precisely in weakened or damaged wood (Tarasov et al., 1981; Hill & Perry, 2011).

3. Regulating yield and berry quality. Correct pruning prevents overcrowding. A well‑lit and well‑ventilated canopy not only promotes better wood ripening but also more even berry colouring. Berries become larger and their flavour more intense. A congested bush, on the contrary, produces small and sour berries.

4. Ease of care and harvesting. A pruned, compact bush is much easier to treat against diseases and pests, and most importantly, it is much simpler and faster to pick berries from it.

Thus, pruning blackcurrants is not a one‑off procedure but a well‑thought‑out system of measures that allows you to manage the growth and fruiting of the bush throughout its life, ensuring a stable and high‑quality harvest. In the following chapters, we will examine in detail how to do this correctly and at what times.

2. Shoot Biology and Its Importance for Pruning. Optimal Pruning Times

For pruning to be not just mechanical removal of branches but a conscious tool for managing yield, it is important to understand how the blackcurrant bush lives and develops. Knowledge of a few key biological features will allow you to make the right decisions at the bush.

Peculiarities of growth and fruiting

1. Short productive cycle of a branch. This is the most important principle for pruning. As already mentioned, blackcurrant branches are most productive at the age of 2–4 years, after which their productivity declines sharply (Kurennoi et al., 1985). Therefore, the main task of pruning is to constantly stimulate the growth of new, young shoots and remove old, spent ones.

2. Bud structure: mixed type. In blackcurrants, flower buds are mixed. This means that from one such bud, not only a flower cluster but also one or two small replacement shoots develop in the following year (Kurennoi et al., 1985). This feature ensures continuous renewal of the bush. That is why on vigorous annual growths, where buds are well developed, the main crop is formed.

3. Bud awakening along the entire length of the shoot. In most modern and Siberian varieties (e.g., Golubka, Leningradskiy Velikan, Seianets Golubki), flower buds are set along the entire length of the annual growth. This property is called high early‑bearing capacity and is highly valued because it allows high yields already in the second year after the shoot grows (Kurennoi et al., 1985; Dankov, 2015).

4. Regenerative capacity. The ability of the bush to form new basal shoots from dormant buds at the base is the basis of its longevity. In blackcurrants, this ability is well expressed, and pruning is a powerful stimulus for its awakening (Potapov et al., 2000).

How is this knowledge applied in practice?

• Stimulating new shoots. Pruning, especially shortening, causes a powerful flow of nutrients to the dormant buds at the base of the bush. This triggers the formation of strong annual shoots (“zero shoots”), which will become the basis of future harvests (Hill & Perry, 2011).
• Removing old branches. Knowing that the peak productivity occurs at 2–4 years of age, we remove without regret all branches older than 5–6 years. They have too short growth (less than 15 cm), and therefore few fruit buds (Tarasov et al., 1981; Kurennoi et al., 1985).
• Assessing the condition of the bush. Understanding the biology allows you to assess the potential of the bush. If the annual growth on branches is less than 15–20 cm, it is a clear signal that the bush is ageing and needs rejuvenating pruning.

Optimal pruning times

In most regions, the main pruning of blackcurrants is carried out during the dormant period, early in spring, before bud break (Kurennoi et al., 1985; Hill & Perry, 2011; Buckingham, 2010). This is usually the time when the threat of severe frost has passed but sap flow has not yet begun.

1. Early‑spring pruning (main).

• This is the best time for most gardeners. The bush is still “asleep” and you can clearly see its structure.
• Cuts at this time heal faster because with the onset of sap flow the plant actively “closes” the wounds.
• In regions with harsh winters, spring pruning is preferable to autumn pruning because, in case of partial frost damage to shoots, you can assess the real damage and remove only dead wood (Buckingham, 2010).

2. Autumn pruning (limited).

• Light sanitary pruning in autumn, after leaf fall, is acceptable. At this time, dry, diseased or broken branches can be removed.
• In areas with mild winters and good snow cover, some gardeners shift all pruning to autumn. However, in regions with severe and low‑snow winters, this is risky: fresh cuts may freeze.

3. Summer pruning (corrective).

• Scientific literature (Kurennoi et al., 1985) describes a summer pruning technique to stimulate growth. For example, pinching the tips of young shoots in late summer (August) promotes better ripening and winter preparation.
• In summer, weak and unpromising green shoots can also be removed so they do not waste the bush’s energy. However, the main shaping and rejuvenating pruning remains for early spring.

The golden rule: Perform the main pruning of blackcurrants early in spring, before bud swelling. All other types of pruning are supplementary and aimed at maintaining the health and shape of the bush.

3. Training Young Plantings (First 3–4 Years)

The first year of a bush’s life is the most important for its future shape and productivity. What you do during this period will lay the foundation for 10–15 years of fruiting. The main goal of training a young bush is to achieve the annual appearance of 3–4 vigorous basal shoots, so that by the 4th–5th year the bush consists of 12–15 well‑developed branches of different ages (Kurennoi et al., 1985; Tarasov et al., 1981). This is achieved by regular pruning, which stimulates the awakening of dormant buds at the base of the bush.

Planting year (first spring)

The most critical stage. Immediately after planting (in autumn or early spring), it is necessary to carry out a severe pruning of the sapling. Do not be afraid; this is vital for a good start.

How to prune: All shoots of the sapling are shortened, leaving 2–4 well‑developed buds on each. Above the ground, only a 10–15 cm length of shoot should remain (Hill & Perry, 2011; Potapov et al., 2000). When planting at an angle (45°), this measure is especially effective because it stimulates the formation of powerful basal shoots from the buried part of the stem.

Key principle: “Sacrifice the first‑year harvest for a strong bush in the future.”

Some guides (Buckingham, 2010) recommend a more gentle pruning for container‑grown saplings with well‑developed root systems, but for amateur gardeners the general rule of “severe pruning” remains reliable and clear.

Second year (first training pruning)

By the spring of the second year, several strong shoots will have grown from the retained buds. Now our task is to begin shaping the skeleton of the bush.

• Selecting shoots: From all the grown shoots, choose 3–4 of the strongest and best‑positioned ones. Remove the rest, weaker ones, at the very base (at ground level). This prevents overcrowding and allows the bush to direct its energy to the most promising branches (Tarasov et al., 1981; Potapov et al., 2000).
• Shortening: The retained shoots can be slightly shortened to stimulate branching, but for blackcurrants this is not always necessary. The main thing is the selection of strong “zero shoots”.

Third year (second training pruning)

The principle is the same as in the second year:

• Selection: Again leave 3–4 of the strongest basal shoots that grew during the previous summer.
• Removal: Remove all superfluous weak shoots at ground level. Also remove broken and diseased branches.

Fourth year and beyond (completion of training)

By this time, the bush should have about 12–15 strong basal branches of different ages (1, 2 and 3 years old). Now the training task is considered complete.

• Maintaining balance: Every year continue to remove old, weak and extra basal shoots, leaving 3–4 of the strongest “zero shoots” to replace ageing branches (Tarasov et al., 1981).
• Beginning of rejuvenation: From the fifth‑sixth year, begin systematically cutting out 3–4 of the oldest (4–5‑year‑old) branches, replacing them with new strong shoots.

Scheme for training a young bush (visual)

Remember: the first 3–4 years are an investment in the future. The time spent will pay off with consistently high yields of large and sweet berries for many years.

4. Annual Pruning of a Fruiting Bush (Maintenance)

When the bush is formed and has entered full fruiting (usually from the 4th–5th year), the nature of pruning changes. Now the main task is not so much to create a shape but to constantly maintain high productivity, avoiding overcrowding and ageing of the bush. This is like regular technical maintenance: if not done in time, a reliable mechanism will start to fail.

Basic principle: annual replacement of old branches with new ones

As we already know, the peak productivity of a blackcurrant branch occurs at 2–4 years, after which it sharply loses potential (Kurennoi et al., 1985). Therefore, maintenance pruning is based on a simple rule: each year, remove 3–4 of the oldest branches and leave the same number of the strongest annual basal shoots (“zero shoots”) to replace them (Tarasov et al., 1981; Potapov et al., 2000).

Algorithm for annual spring pruning

Pruning is best done early in spring, before bud break. You will have a clear view of the bush’s structure.

1. Step 1. Remove old, low‑productive branches.

• Identify branches older than 5–6 years. They are easily recognised by their dark, almost black, peeling bark, as well as weak and short growth—usually less than 10–15 cm over the past season (Tarasov et al., 1981; Kurennoi et al., 1985). These branches will no longer give a good harvest and only drain the bush’s energy.
• Cut them out at the very base, at ground level, leaving no stubs. Stubs are gateways for infections and breeding grounds for pests (Trunov et al., 2012).

2. Step 2. Remove all weak and superfluous annual shoots.

• Examine the young shoots that grew last year. From all, keep only 3–4 of the strongest and best‑positioned ones (they will replace the old branches).
• Cut out at the base all other weak, thin, crooked, and inward‑growing annual shoots. There is no point in keeping them: they will not yield a good harvest and will only thicken the bush (Hill & Perry, 2011; Potapov et al., 2000).

3. Step 3. Sanitary cleaning.

• Remove all broken, dry, diseased and frost‑damaged branches, regardless of their age (Tarasov et al., 1981). This is an important preventive measure against diseases and pests.

Result of a properly pruned bush

After annual maintenance pruning, a healthy, well‑cared‑for bush should have:

• No more than 12–15 branches of different ages (usually 3–4 branches of each age: 1‑, 2‑, 3‑ and 4‑year‑old) (Kurennoi et al., 1985).
• Base of the bush no wider than 25–30 cm, without overcrowding, so that sunlight and air freely penetrate the canopy (Tarasov et al., 1981; Trunov et al., 2012).
• Annual strong growth on the retained branches (at least 30–40 cm), which is the guarantee of next year’s crop.

Important nuance: approach to varieties with different shoot‑forming ability

Some varieties (especially of the Siberian group, e.g., Golubka, Seianets Golubki) have a very high ability to form basal shoots. Others have a more moderate one. If the bush is “lazy” and produces few zero shoots, you can slightly intensify pruning to stimulate their growth. If, on the other hand, the bush produces too many shoots, they must be ruthlessly thinned, leaving only the strongest specimens (Dankov, 2015).

Annual maintenance pruning is a simple but regular procedure that, when performed correctly, guarantees that your blackcurrant bush will remain young, healthy, and consistently delight you with large and sweet berries year after year.

5. Rejuvenation of Old Neglected Bushes

Sometimes a blackcurrant bush grows for years without proper care. It turns into an impenetrable thicket of old, diseased and intertwined branches, berries become smaller, and yields drop to a minimum. However, do not rush to uproot such a plant. Blackcurrant has excellent regenerative ability, and even a heavily neglected bush can be rejuvenated and restored to full life. This will take time and decisive action, but the result is worth it.

Signs of a neglected bush

Before picking up the pruners, assess the condition of the bush. The following signs indicate the need for rejuvenation (Hill & Perry, 2011; Tarasov et al., 1981):

• The bush is heavily thickened, branches are intertwined and grow chaotically.
• Old branches (older than 5–6 years) with dark, peeling bark predominate.
• Annual growth on branches is very weak—less than 10–15 cm.
• Berries are small, harvest is sparse.
• Many dry, broken or diseased branches.

Two approaches to rejuvenation

Depending on the degree of neglect and your patience, you can choose one of two approaches. Both are based on the principle: “remove old, unproductive wood and give way to young shoots.”

6. Special Forms: Standard and Espalier Forms

The classic bush form of blackcurrant is the standard for commercial and amateur horticulture. However, there are alternative training methods that may interest experimenting gardeners or those who wish to combine utility with ornamentality. These are the standard and espalier forms. They require more attention and skill but open up new possibilities.

Standard form

The standard form involves growing currants as a small tree with a single vertical trunk (standard) 40–80 cm tall and a compact crown at its top.

How to create a standard form. The most reliable method is grafting a cultivar cutting of blackcurrant onto a tall (60–80 cm) standard of golden currant (Ribes aureum) or another vigorous rootstock (Bowling, 2000). Grafting is a complex procedure not accessible to everyone. An alternative is artificial formation of a standard from a single shoot, but it is more labour‑intensive and less reliable because the bush will produce root suckers that must be constantly removed.

Advantages:

• High ornamental value—the tree‑bush looks elegant.
• Ease of harvesting—berries hang in plain sight, no need to bend down.
• Good illumination and ventilation of the crown, reducing disease risk.

Disadvantages:

• Difficulty of creation (requires grafting or constant removal of suckers).
• Lower winter hardiness—the standard may freeze in severe winters, especially if it is above the snow cover.
• The bush ages faster because there is no constant renewal of basal shoots. The lifespan of a standard bush is shorter than that of a bush form (usually 8–10 years).

Pruning features. For the standard form, it is important to maintain a compact crown. Each year, remove old branches inside the crown, thin it, and cut out all suckers appearing at the base of the standard or on the standard itself. Prune as for a normal bush, in early spring.

Espalier form

The espalier form is growing currants in a single vertical plane on a wire support (trellis). Most often, the bush is formed as a fan, directing branches in different directions along the wires.

How to create an espalier form. When planting, place the sapling in the centre of the future trellis. In the first 2–3 years, form the bush in a fan pattern: leave 4–6 strong shoots, directing them evenly to the sides and tying them to the bottom wire. As they grow, tie the shoots to the upper wires. It is most convenient to use a ready‑made trellis with 2–3 rows of wire at heights of 50–60 cm, 90–110 cm and 130–150 cm. In the literature, such systems are described for raspberries, but they are also applicable to currants (Potapov et al., 2000; Trunov et al., 2012).

Advantages:

• Maximum illumination of all branches.
• Excellent ventilation, which prevents the development of powdery mildew and other fungal diseases.
• Very convenient harvesting—all clusters are in plain sight.
• Possibility to densify plantings because bushes take up less width.

Disadvantages:

• Requires costs for installing supports (posts, wire).
• Needs regular tying of shoots.
• More complex pruning because you need to maintain the given plane and direction of growth.

Pruning features. Pruning espalier currants is aimed at maintaining the fan shape. Remove all branches extending beyond the plane, as well as shoots growing inward. Replace old branches with new basal shoots, but direct them to the required sides and tie them to the wire. The principle of rejuvenation (removing branches older than 5–6 years) remains, but replacement shoots are immediately fixed on the trellis.

Is it worth trying?

For most gardeners, the classic bush form is the simplest and most reliable way to obtain a stable harvest. It does not require additional costs or complex agronomic techniques. Standard and espalier forms are more for enthusiasts and collectors who are willing to devote more time to plants. If you want to try something new and decorate your garden, these forms are quite suitable. However, remember that they require more careful care, especially in terms of frost protection and regular tying.

7. Sanitary Pruning

Sanitary pruning is not so much a shaping or rejuvenating technique as a mandatory preventive procedure aimed at maintaining the health of the bush. Its purpose is to remove all diseased, damaged and weakened parts of the plant that can become sources of infection or breeding grounds for pests. This is the simplest but at the same time the most important operation in caring for blackcurrants, which cannot be ignored (Hill & Perry, 2011; Buckingham, 2010).

When to carry out sanitary pruning

Unlike formative pruning, which is performed strictly in early spring, sanitary cleaning can be done throughout the growing season:

1. Early spring (before bud break). This is the main and most convenient time. After winter, all frost‑damaged, snow‑broken and dry branches are clearly visible. They are removed first, before sap flow begins (Tarasov et al., 1981; Bowling, 2000).

2. During the season. If you notice dry, diseased or broken branches on the bush in summer, do not postpone their removal. The sooner you remove the source of infection, the lower the risk of infecting the entire bush.

3. In autumn (after leaf fall). Autumn sanitary pruning is preparation for winter. Remove all remaining dry, broken and obviously diseased branches so they do not become shelters for pests over winter.

What is subject to sanitary removal

During sanitary pruning, all branches and shoots showing signs of trouble are removed:

• Dry branches. They break easily and have dead, peeling bark. Such branches are no longer alive and only take up space.
• Broken branches. Mechanical damage caused by wind, snow or careless handling are open gates for infection. They must be removed, cutting below the break point to healthy wood.
• Diseased branches. The presence of suspicious spots on the bark or wood, cracks with gum exudation, or if the branch is covered with an unusual coating—all these are signs of disease (e.g., anthracnose, septoria or powdery mildew). Such branches are cut out and destroyed (Buckingham, 2010; Tarasov et al., 1981).
• Weakened and overcrowding shoots. Although they are not always diseased, weak, thin, crooked shoots, as well as those growing inward or lying on the ground, are also subject to removal. They will not yield a good harvest, yet they drain the bush’s energy and contribute to overcrowding (Kurennoi et al., 1985).
• Pest‑damaged branches. If you see signs of insect activity (e.g., galls from bud mite, tunnels of clearwing moth or traces of other pests), such branches must also be cut out and burned (Tarasov et al., 1981).

Sanitary pruning technique

1. Tool. Use sharp secateurs for branches up to 2–3 cm in diameter. For thicker branches, use a garden saw or loppers. The tool must be clean and sharp—this ensures a smooth cut and reduces injury to the plant.

2. Cut. Branches should always be cut out at the very base, at ground level, leaving no stubs. Stubs are unsightly, do not heal, and through them diseases enter the bush (Trunov et al., 2012; Potapov et al., 2000). Exception—if you deliberately leave stubs to stimulate regrowth (this applies to radical rejuvenation, see Chapter 5), but in sanitary pruning this is not used.

3. Treatment of cuts. For small cuts (up to 1 cm in diameter), treatment is not necessary; they heal quickly. Larger cuts should be covered with grafting wax or a special healing paste to protect against infection (Potapov et al., 2000; Kurennoi et al., 1985).

Where to put the cut branches

All cut diseased, dry or damaged branches must be collected and mandatorily burned or buried away from the garden (Tarasov et al., 1981; Trunov et al., 2012). Never put them in a compost heap: disease spores and pest larvae can survive there and later infect other plants. Healthy, strong annual shoots removed during thinning can be shredded and used as mulch for other crops or also burned for ash.

Rule for the gardener: Sanitary pruning is the simplest and most accessible way to protect your currant plantation from diseases and pests. Regular performance will help you keep bushes healthy and strong without using unnecessary chemicals.

8. Pruning Features Depending on the Variety

Although the basic principles of pruning blackcurrants are universal, it is important to consider that different varieties can differ significantly in their biological characteristics. What is good for one variety may be ineffective or even harmful for another. Therefore, a knowledgeable gardener always adapts his actions to the specific variety growing on his plot.

Why are varietal features important for pruning?

Differences between varieties manifest in several key parameters directly affecting the pruning strategy (Dankov, 2015; Kurennoi et al., 1985):

1. Regenerative capacity. Some varieties produce many basal shoots (“zero shoots”) annually, others much fewer. This determines how aggressively you need to thin the bush.

2. Early‑bearing and fruiting pattern. In some varieties, flower buds are set along the entire length of annual growth (typical of many Siberian varieties), in others—mainly in the middle and upper part of the shoot. This affects whether you should heavily shorten annual shoots.

3. Longevity of fruit formations. In most blackcurrant varieties, fruit spurs (ringlets) live 1–3 years, after which they die. However, in some varieties this period may vary, affecting the frequency of branch replacement.

Main variety groups and their pruning

9. Care After Pruning

Pruning is a serious intervention in the life of a plant, a kind of surgical operation. As after any operation, the blackcurrant bush requires special care to recover faster, heal wounds, and direct all its energy to the growth of new shoots and setting the future crop. Proper actions after pruning are no less important than the procedure itself.

Immediately after pruning (early spring)

Right after you finish pruning, the bush needs your help.

1. Protection of cuts. As mentioned in Chapter 7, large cuts (more than 1 cm in diameter) should be covered with grafting wax or a special healing paste (Potapov et al., 2000; Kurennoi et al., 1985). This prevents the entry of fungal spores and pathogenic bacteria through open wounds. Small cuts quickly dry out and heal on their own.

2. Fertilising. Pruning stimulates vigorous growth of new shoots, and this requires significant nutritional resources. To help the bush, early in spring, immediately after pruning, fertilisation is necessary (Bowling, 2000; Hill & Perry, 2011; Buckingham, 2010).

• Organic fertilisers. Apply 1–2 buckets of well‑rotted compost or manure under each bush. This not only provides nutrition but also improves soil structure. Well‑rotted farmyard manure can also be used.
• Mineral fertilisers. Blackcurrant is a nitrogen‑loving crop. To stimulate shoot growth, apply nitrogen fertilisers, e.g., ammonium nitrate or urea (at a rate of 30–40 g per 1 m²). It is also useful to add a complex fertiliser containing phosphorus and potassium (e.g., nitrophoska) (Potapov et al., 2000). Always check the dosages on the product label.
• Important: Avoid fertilisers containing chlorine (e.g., potassium chloride). Currants are very sensitive to chlorine; it can cause root burn and growth inhibition (Hill & Perry, 2011; Bowling, 2000).

3. Watering. In early spring, the soil is often moist from meltwater, but if winter was low‑snow or spring dry, the bush will need watering. Water the bush abundantly (30–50 litres) so that the soil is moistened to the depth of the main root mass (up to 40–50 cm). Moist soil accelerates the dissolution of fertilisers and helps the plant to start growing faster (Trunov et al., 2012).

4. Mulching. After fertilising and watering, mulch the root zone (within a radius of 50–60 cm from the centre of the bush) with a layer of organic matter 5–10 cm thick (Bowling, 2000; Buckingham, 2010; Potapov et al., 2000). Suitable mulch materials include:

• rotted sawdust or wood shavings;
• peat;
• mown grass (without seeds);
• straw;
• compost.

Mulch helps retain moisture in the soil, prevents weed growth, and, as it gradually decomposes, serves as an additional source of nutrition.

Care during the season (spring–summer)

During the growing season after pruning, pay attention to the bush.

1. Regular watering. Blackcurrant is very moisture‑loving (Bowling, 2000; Dankov, 2015). It is especially important to ensure adequate watering during the period of active shoot growth (May–June) and during berry filling. In dry weather, water the bushes 1–2 times a week, pouring 30–50 litres under each bush. It is better to carry out infrequent but abundant waterings than frequent and shallow ones.

2. Soil loosening. After watering or rain, when the soil dries slightly, shallowly (5–8 cm) loosen the soil around the bush, trying not to damage surface roots. Loosening breaks the soil crust and improves oxygen access to the roots.

3. Weeding. Regularly remove weeds in the root zone and between rows. Weeds are competitors for moisture and nutrition, as well as shelters for pests and diseases.

4. Pinching green shoots (optional). In late summer (August), you can pinch the tips of the most vigorous green shoots of the current year (Kurennoi et al., 1985). This promotes better ripening and winter preparation, and also stimulates branching for the following year.

5. Pest and disease control. After pruning, the bush is weakened, so it is especially vulnerable to pests and diseases. Regularly inspect the bushes and, at the first signs of infestation, take measures (use approved biological products or folk remedies). Preventive treatments in early spring (before bud break) and after flowering are also very effective (Buckingham, 2010; Bowling, 2000).

What not to do after pruning

• Avoid over‑watering. Although currants like water, stagnant moisture at the roots is harmful. Do not flood the bush, especially if the soil is clayey and poorly drained.
• Do not over‑feed with nitrogen in the second half of summer. Nitrogen stimulates green mass growth. If applied in summer, shoots will grow until autumn, will not have time to ripen and will freeze in winter. Nitrogen fertilisation should be done only in early spring. In summer and autumn, emphasis should be on phosphorus‑potassium fertilisers, which promote wood ripening and increase winter hardiness.

Care schedule after pruning

Proper post‑pruning care is the key to rapid recovery of the bush and its high productivity in the next season. Treat this stage with all seriousness, and your currant plantation will reward you with abundant harvests of large and sweet berries.

10. Common Mistakes and Questions (FAQ)

Pruning blackcurrants, for all its apparent simplicity, often raises questions and doubts among amateur gardeners. Beginners are afraid of doing harm, and experienced gardeners sometimes make typical mistakes out of habit or inattention. To help you avoid common problems, we have collected the most frequent questions and analysed typical mistakes.

Frequently Asked Questions (FAQ)

Question 1. Is it mandatory to prune blackcurrants? Can I leave it to grow “as is”?

Answer. You can leave the bush without pruning, but it will quickly become thick, berries will become small and sour, and yields will drop. Without pruning, the bush lives “its own life”, ages and gets more diseases. Pruning is not a whim but a necessary agronomic technique that allows you to manage the health and productivity of the plant (Kurennoi et al., 1985; Hill & Perry, 2011).

Question 2. How to distinguish an old branch from a young one?

Answer. It is very simple:

• Young shoots (1 year). Light, flexible, bark smooth, light brown or yellowish.
• Branches 2–3 years old. Bark becomes grey‑brown.
• Old branches (older than 4–5 years). Bark dark, almost black, peeling, many lichens on shoots. Growths are short (less than 15 cm) (Tarasov et al., 1981; Bowling, 2000).

Question 3. Can I prune currants in autumn?

Answer. The main pruning is recommended in early spring (before bud break). This is safer for the plant, especially in regions with harsh winters. In autumn, only sanitary pruning is allowed—removing dry, diseased, broken branches, as well as those lying on the ground (Buckingham, 2010; Bowling, 2000).

Question 4. What to do if the bush has no young basal shoots (“zero shoots”) at all?

Answer. This often happens with varieties of the European group or on old, exhausted bushes. To stimulate the growth of new shoots, apply strong rejuvenating pruning: cut out 2–3 of the oldest branches at the base and shorten the remaining branches by one‑third or even half their length. This will awaken dormant buds at the base of the bush (Hill & Perry, 2011; Potapov et al., 2000).

Question 5. I have very long annual shoots on my bush. Should I shorten them?

Answer. Shortening annual shoots (pinching) in blackcurrants is a controversial technique. In vigorous varieties of Siberian origin, it can be used to stimulate branching. In varieties where fruit buds are located in the upper part of the shoot, shortening may reduce yield. If you still decide to shorten a shoot, remove only the very tip (3–5 cm) with underdeveloped or weak buds (Kurennoi et al., 1985; Dankov, 2015).

Question 6. Can I prune currants during flowering or fruiting?

Answer. During flowering and fruiting, the bush spends all its energy on the crop. Pruning at this time is highly undesirable—it is a great stress for the plant. The only exception is the removal of dry or diseased branches (sanitary pruning) if there is a threat of spreading infection.

Question 7. What is a “variety with high regenerative capacity”, and how does it affect pruning?

Answer. These are varieties that annually produce many new shoots from the root (e.g., 'Golubka', 'Seianets Golubki' and other Siberian varieties). They need to be actively thinned, leaving only 3–4 of the strongest shoots and removing the rest. Otherwise, the bush quickly thickens (Dankov, 2015; Kurennoi et al., 1985).

Question 8. What to do if the bush is affected by reversion (double blossom)?

Answer. Reversion is a dangerous viral disease that cannot be cured. Affected bushes stop fruiting. The only measure is to uproot and burn the diseased plant to save neighbouring bushes. Healthy bushes should be regularly inspected and, at the first signs (flowers become double, leaves elongate), the infected plant should be immediately removed (Buckingham, 2010; Bowling, 2000).

Common pruning mistakes

1. Mistake: “Pity” for old branches.

• Many gardeners are reluctant to cut out old, thick branches, thinking they will still yield. This is the main mistake leading to bush ageing. Old branches do not produce large berries but drain energy from young shoots. They must be ruthlessly removed.

2. Mistake: Leaving stubs.

• When cutting out branches, gardeners sometimes leave stubs 3–5 cm high. This is unacceptable! Stubs do not heal, become “gateways” for infections and breeding grounds for pests (clearwing moth, flat‑headed borer). Branches should be cut strictly at ground level.

3. Mistake: One‑time “stumping” pruning.

• Radical rejuvenation (deep pruning of all branches) is an effective technique, but it is applied only to heavily neglected bushes. If applied to a healthy bush, you will lose the harvest for 1–2 years. For normal bushes, it is better to use annual maintenance pruning (Chapter 4).

4. Mistake: Wrong timing.

• Pruning in cold or wet weather (especially in autumn) increases the risk of wound infection. The best time is early spring, when the ground has thawed but buds have not yet swollen.

5. Mistake: Using dull or dirty tools.

• A dull secateur leaves ragged, “frayed” cuts that take a long time to heal. A dirty tool can transfer infection from a diseased bush to a healthy one. Keep your tools clean and sharp.

6. Mistake: Lack of post‑pruning care.

• After cutting branches, the gardener forgets that the bush now needs enhanced nutrition and watering. Without fertilisation, the bush will recover poorly and will not give good growth.

Brief summary

To ensure that pruning blackcurrants brings only benefits, remember three main rules:

1. Regularity. Perform pruning every year, not occasionally.

2. Timeliness. Do the main pruning in early spring.

3. Confidence. Do not be afraid to cut out old and weak branches. Remember: old branches are yesterday, young ones are the future harvest.

By following these simple recommendations, you will ensure your blackcurrant bushes health and longevity, and yourself a stable and tasty harvest for many years.

References

1. (2003). ‘Currants and Gooseberries’, in Cornell Guide to Growing Fruit at Home. Ithaca, NY: Cornell Cooperative Extension, pp. 84-89.
2. Bowling, B.L. (2000). ‘Minor Crops’, in The Berry Grower's Companion. London, UK: Timber Press, pp. 221-250.
3. Buckingham, A. (2010). ‘Black currants’, in Grow Fruit. New York, NY: DK Publishing, pp. 239-246.
4. Hill, L., Perry, L. (2011). ‘Ribes, Elderberries, and Other Bush Fruits’, in The Fruit Gardener’s Bible. North Adams, MA: Storey Publishing, pp. 89-100.
5. Даньков, В.Васильевич., Скрипниченко, М.Михайловна., Логинова, С.Федоровна., Горбачёва, Н.Николаевна., Щербакова, Г.Васильевна., Долженко, Т.Васильевна. (2015). ‘Смородина [Currant]’, in Ягодные культуры [Berry crops]. Санкт-Петербург: Лань, pp. 101-111.
6. Кривко, Н.П. (2014). ‘Ягодные культуры и технология их выращивания [Berry crops and their cultivation technology]’, in Плодоводство [Fruit growing]. Санкт-Петербург: Лань, pp. 271-317.
7. Куренной, Н.М. (1985). ‘Культура ягодных растений [Berry plant culture]’, in Плодоводство [Fruit growing]. Москва: Агропромиздат, pp. 337-385.
8. Потапов, В.А., Фаустов, В.В., Пильщикова, Ф.Н. (2000). ‘Ягодные культуры [Berry crops]’, in Плодоводство [Fruit growing]. Москва: Колос, pp. 408-428.
9. Тарасов, В.М., Фаустов, В.В., Никиточкина, Т.Д. (1981). ‘Обрезка смородины, крыжовника и малины [Pruning currants, gooseberries, and raspberries]’, in Практикум по плодоводству [Fruit growing workshop]. Москва: Колос, pp. 298-300.
10. Трунов, Ю.В., Самощенков, Е.Г., Дорошенко, Т.Н. (2012). ‘Ягодные культуры [Berry crops]’, in Плодоводство [Fruit growing]. Москва: КолосС, pp. 386-412.