Watering Red, White, and Golden Currants

Why Water Is So Important

The root system of currants is predominantly located in the upper soil layers – the bulk of the roots are found at a depth of 10–60 cm, with only a few individual roots penetrating to 2 m (Kurennoi et al., 1985; Potapov et al., 2000). This shallow root placement makes the plants sensitive to drying of the topsoil layer.

Water participates in all vital processes:

• Nutrient uptake – mineral elements are absorbed by roots only in dissolved form (Huang, 2012).
• Photosynthesis – moisture is essential for the formation of organic substances in the leaves.
• Transport of substances – water moves nutrients from roots to leaves and fruits.
• Thermoregulation – evaporation of water through leaves protects plants from overheating.
• Berry formation – during the filling period, currant berries consist of 80–85% water.

Specifics of Different Species

Although red, white, and golden currants are less demanding of moisture than black currants, their needs differ:

• Red currant has a more powerful and deeper root system compared to black currant, making it somewhat more drought‑tolerant. However, during dry periods it also needs watering, especially during fruit set and berry ripening (Kurennoi et al., 1985).

• White currant is biologically close to red currant and has similar moisture requirements.

• Golden currant is the most drought‑tolerant species among all currants (Buckingham, 2010; Dan’kov et al., 2015). Its deep root system and dense cuticle on stems, which reduces evaporation, allow it to withstand dry periods successfully. However, even golden currant yields significantly higher crops with regular irrigation, especially in the southern regions with hot and dry climates.

Consequences of Moisture Deficit

Even a short‑term water deficit can lead to serious problems:

• Reduced yield – with insufficient moisture, berries become smaller, their number decreases, and total yield drops.
• Worsened berry quality – fruits become small, sour, with thick skin.
• Weakened shoot growth – the length of annual increments decreases, affecting next year’s crop.
• Increased susceptibility to diseases – weakened plants are more easily affected by powdery mildew and other diseases.
• Reduced winter hardiness – plants that have experienced moisture deficit tolerate winter frosts less well.

Consequences of Excess Moisture

Over‑watering is no less dangerous:

• Root rot – under stagnant water, the root system suffers from oxygen deficiency (Potapov et al., 2000; Trunov and Samoshchenkov, 2012).
• Development of fungal diseases – high humidity favours the spread of grey mould (Botrytis), anthracnose, and other diseases (Buckingham, 2010).
• Collar rot – especially dangerous for red and white currants, which are more sensitive to over‑watering than black currants.

The Key Rule of Watering

The golden rule of watering currants is: water rarely but abundantly, so that water penetrates to the depth of the main root mass (30–60 cm). Frequent shallow waterings do more harm than good – they encourage root growth in the topsoil, reducing the plant's drought tolerance.

Site selection and soil preparation also affect the water regime: currants prefer moisture‑retentive but well‑drained soils where water does not stagnate (Buckingham, 2010; Dan’kov et al., 2015).

Early Spring (late April – May)

Immediately after snowmelt and the start of vegetation, plants need moisture for bud break and shoot growth. In most regions with a temperate climate, spring soil moisture reserves are usually sufficient, and additional watering is not required. However, in areas with low‑snow winters or rapid snowmelt, spring moisture deficit is possible. In such cases, it is recommended to carry out a moisture‑charging irrigation before bud break (Buckingham, 2010).

Flowering Period (late April – June, depending on region)

Red and white currants flower early – in the middle zone this is usually May. During this time, plants are particularly sensitive to both drought and frost. Moisture deficit during flowering can lead to flower drop and reduced fruit set. However, at the same time, excessive soil moisture and high air humidity promote the development of grey mould (Botrytis) and other fungal diseases (Buckingham, 2010).

Important: Watering during flowering should be done carefully, only when there is a clear soil moisture deficit, and preferably by furrow irrigation or under‑root watering, avoiding wetting flowers and leaves (Tarasov et al., 1981).

Golden currant is more drought‑tolerant and usually does not need watering during flowering, except during prolonged drought (Dan’kov et al., 2015).

Shoot Growth and Ovary Formation (June – early July)

This is one of the most critical periods. After flowering, intensive growth of annual shoots begins – on these shoots, flower buds for next year’s crop are laid (Tarasov et al., 1981). At the same time, berries form and begin to fill.

During this period, plants consume large amounts of water. Particularly high moisture requirements occur during the berry‑filling phase – about 10–15 days after flowering and until the start of ripening (Trunov and Samoshchenkov, 2012).

Red and white currants: with a lack of moisture during this period, berries grow small, yield decreases, and shoots give weak growth, reducing future yields.

Golden currant: although more drought‑tolerant, during prolonged drought during berry filling (especially in southern regions), watering significantly improves fruit quality and size (Dan’kov et al., 2015; Krivko et al., 2014).

Berry Ripening (July – August)

Ripening of berries of different varieties of red, white, and golden currants occurs in July – August. During this time, watering is needed, but the volume and frequency should be reduced.

Why: excess moisture during ripening impairs berry flavour – they become watery, less sweet, may crack, reducing their shelf life and transportability (Buckingham, 2010; Krivko et al., 2014). In addition, high humidity promotes grey mould.

Recommendation: water only during severe drought, moderately, maintaining soil moisture but avoiding over‑watering.

Post‑Harvest Period (August – September)

After harvesting, a second wave of root growth and flower bud initiation on shoots of the following year begins (Tarasov et al., 1981; Potapov et al., 2000). This is a very important stage for forming next season's yield.

Red and white currants need sufficient moisture during this period for normal bud set. If the weather is dry, 1–2 waterings are recommended (Buckingham, 2010).

Golden currant also responds positively to watering during this period, although it is less critical (Dan’kov et al., 2015).

Late Autumn (October – November) – Moisture‑Charging Irrigation

2–3 weeks before the onset of stable frosts, the so‑called moisture‑charging irrigation is carried out. Its purpose is to saturate the soil with moisture to a depth of 60–70 cm, creating a water reserve necessary for wintering and early spring growth (Potapov et al., 2000; Trunov and Samoshchenkov, 2012).

Importance of moisture‑charging irrigation:

• Improves winter hardiness – moist soil freezes less and protects roots from freezing.
• Provides a moisture reserve for spring – especially valuable in regions with dry springs.
• Promotes better shoot regrowth in spring.

Autumn watering is especially important for red and white currants, which are sensitive to winter desiccation. Golden currant is more resistant, but it also responds to autumn moisture (Dan’kov et al., 2015).

Summary Table of Water Requirements by Growth Phase

Important Note on Species

• Red and white currants – are more moisture‑loving than golden currant, and their watering needs are higher, especially during critical periods (flowering, berry filling, autumn moisture‑charging).
• Golden currant – is the most drought‑tolerant, but during berry filling in southern arid regions, watering significantly increases yield (Kurennoi et al., 1985; Dan’kov et al., 2015).

3.1. Visual Assessment of Plants

Currants themselves give signals of moisture shortage. Careful observation of the plants allows you to notice problems at an early stage.

Signs of water deficiency:

• Loss of leaf turgor – leaves become limp, droop, lose elasticity. On a hot day, this may be temporary, but if turgor does not recover by morning, it is a sure sign of moisture deficit (Buckingham, 2010).
• Yellowing and curling of leaves – during prolonged drought, leaves begin to yellow, especially at the edges, and curl into a tube.
• Smaller berries – fruits become small, fall prematurely, or ripen while remaining small and sour (Kurennoi et al., 1985).
• Cessation of shoot growth – during the active growth period (June–July), shoots stop elongating, internodes shorten (Tarasov et al., 1981).
• Premature leaf colouring – in autumn, leaves may yellow and fall earlier than usual.

Signs of excess moisture:

• Yellowing and falling of lower leaves – with water stagnation, roots suffer, and the plant begins to shed old leaves.
• Appearance of mould or moss on the soil surface near the base of the bush.
• Stunted growth – in waterlogged soil, roots experience oxygen starvation, which inhibits development (Potapov et al., 2000).
• Cracking of berries – especially characteristic of red currant with sharp fluctuations in humidity (dry then heavy watering).

3.2. Soil Methods for Determining Moisture

The most accessible and reliable method is assessing soil moisture at the depth of the main root zone (20–40 cm).

3.3. Instrumental Methods (for Advanced Gardeners)

For more precise soil moisture control, you can use:

• Soil moisture meter (tensiometer) – an instrument that measures soil moisture in centimetres of water column or as a percentage of full moisture capacity. The optimal range for currants is 70–80% of field capacity (Trunov and Samoshchenkov, 2012). Tensiometers are installed at a depth of 30–40 cm and allow monitoring of moisture in the root zone.

• Electronic moisture sensors – more modern devices giving readings in percentages. They are convenient but require calibration for the specific soil type.

• Weather stations – for professional use. Allow tracking not only soil moisture but also temperature, precipitation, and evaporation.

3.4. Consideration of Weather Conditions and Precipitation

A simple and important method is tracking the weather:

• Precipitation: If less than 15–20 mm of rain has fallen in the last week (roughly 1–1.5 buckets of water per 1 m²) and no rain is forecast in the coming days, the plants need watering (Buckingham, 2010).
• High temperature: At temperatures above 25 °C, evaporation increases sharply, and the interval between waterings should be shortened.
• Strong wind: Windy weather intensifies soil drying (evaporation from the surface and transpiration by plants).

3.5. Specifics for Different Species

• Red and white currants – their moisture requirement is somewhat higher than that of golden currant. If in doubt, watering red and white currants is more likely to be beneficial (provided good drainage), especially during berry filling and bud set (Kurennoi et al., 1985; Dan’kov et al., 2015).

• Golden currant – is more tolerant of drought. The “pinch” method is especially reliable for it: watering is recommended only when the soil is clearly dry at a depth of 20–30 cm. Excess moisture is more dangerous for golden currant than for red currant, as it tolerates stagnant water less well (Dan’kov et al., 2015).

3.6. When to Check Moisture Most Importantly

It is recommended to regularly check soil moisture during the following critical periods:

• Before flowering (end of April – May) – if the soil is dry, water for better fruit set.
• 10–15 days after flowering – the beginning of berry filling, the most important period for moisture control.
• During ripening – especially important not to over‑water.
• After harvest (August – September) – for flower bud set for next year.
• Before winter – assessment of moisture to decide on moisture‑charging irrigation.

Brief Algorithm for Decision‑Making on Watering

1. Check the weather forecast – will there be precipitation in the coming days.

2. Inspect the plants – are there signs of moisture deficit (leaf wilt, colour change).

3. Perform a tactile assessment – take a soil sample from a depth of 20–30 cm and determine its moisture using the “pinch” method.

4. Make a decision:

• If the soil is dry (no lump forms) – water.
• If the soil is moist (firm lump, does not crumble) – no watering needed.
• During ripening – slight drying is acceptable, but do not allow severe drying.

Correct determination of the need for watering allows you to avoid two extremes – drying out and waterlogging. Both are equally harmful to bush health and fruit quality. In the next section, we will consider watering methods that will help efficiently and economically deliver water to the currant roots.

4.1. Furrow Irrigation

How it is done: Shallow furrows (10–15 cm deep) are cut between rows at a distance of 20–30 cm from the bush. Water is supplied along these furrows and gradually soaks into the soil, reaching the root system. After watering, the furrows are levelled and the soil is loosened.

Advantages:

• Water goes directly to the roots, which is especially important for red and white currants.
• Minimal risk of wetting leaves and berries, reducing the likelihood of fungal diseases (Buckingham, 2010).
• Economical method for large volumes of watering.
• Works well with irrigation on slopes (across the slope).

Disadvantages:

• Requires preparation (furrow cutting) and additional labour.
• May contribute to soil compaction in the inter‑rows.
• On sloping plots requires careful planning so that water does not run off too quickly.

Recommendations: Ideal for commercial plantations and large plots. On household plots, it is effective for strip or row planting (Trunov and Samoshchenkov, 2012).

4.2. Sprinkler Irrigation

How it is done: Water is sprayed over the plants using sprinkler units, sprayers, or nozzles, creating artificial rain. This method is widely used in both amateur and commercial horticulture (Kurennoi et al., 1985).

Advantages:

• Evenly wets the soil and the ground layer of air.
• Allows anti‑frost sprinkling (spraying water during frost threats) to protect flowers (Trunov and Samoshchenkov, 2012).
• Can be automated – timers and automatic irrigation systems can be used.

Disadvantages:

• High risk of wetting leaves and berries – promotes the development of powdery mildew, grey mould (Botrytis) and other fungal diseases, especially in rainy weather (Buckingham, 2010).
• Increases water consumption due to evaporation and wind drift.
• May cause compaction of the topsoil and crust formation.

Recommendations:

• Do not use during flowering and berry ripening (to avoid damaging flowers and impairing fruit quality).
• Best used in the evening or early morning hours so that leaves dry before nightfall (Tarasov et al., 1981).
• Suitable for regions with dry and hot climates, where leaves dry quickly.

For golden currant, sprinkling is used less often, as this species is more drought‑tolerant and does not need frequent watering (Dan’kov et al., 2015).

4.3. Drip Irrigation

How it is done: A system of tubes and drippers is laid along the rows, and water is supplied in small portions directly to the root zone of each bush. Drip irrigation is one of the most efficient and economical methods (Potapov et al., 2000).

Advantages:

• Precision: water goes straight to the roots, with no losses from evaporation or wind drift.
• Water saving: water consumption is minimal compared to other methods.
• Preserves soil structure: no crust forms, no soil compaction.
• Reduced disease risk: leaves and fruits remain dry, preventing fungal infections (Buckingham, 2010).
• Possibility of fertigation – simultaneous application of fertilisers with watering (more in section 8).
• Automation: easily connected to timers and controllers.

Disadvantages:

• Initial costs for purchase and installation of the system.
• Clogging of drippers – requires regular flushing and water filtration.
• For small plots may be economically unfeasible.

Recommendations: Drip irrigation is especially effective on small plots, in arid regions, and when growing red, white, and especially golden currant, where it is important to avoid over‑watering (Dan’kov et al., 2015). Optimal for modern gardeners seeking minimal water and labour costs.

4.4. Watering Directly Under the Root (into a Hole)

How it is done: Around each bush (at a distance of 30–40 cm from the centre), a circular or semi‑circular hole 10–15 cm deep is made. Water is poured into it from a hose, watering can, or bucket. After absorption, the hole is covered with dry soil or mulch (Buckingham, 2010).

Advantages:

• Water is directed precisely to the root, leaves and fruits remain dry.
• Simple and accessible method for small plots.
• Minimal water consumption.

Disadvantages:

• Labour‑intensive with a large number of bushes.
• If not careful, local over‑watering can occur if absorption rate is not considered.
• Loosening after watering is mandatory – to avoid crust formation (Potapov et al., 2000).

Recommendations: Most suitable for a small number of bushes in amateur gardens. Especially recommended during flowering and berry ripening to avoid wetting the above‑ground parts (Tarasov et al., 1981).

4.5. Watering Using Containers (Bottles, Pipes)

How it is done: Plastic bottles or pipes with holes buried next to the bush are filled with water, which slowly seeps to the roots. This is a simplified version of drip irrigation.

Advantages:

• Minimal cost (makeshift materials).
• Water is supplied slowly, deeply wetting the soil.
• Leaves and fruits remain dry.
• Works well under limited water supply.

Disadvantages:

• Requires regular refilling of containers (especially in hot weather).
• May be less effective on heavy clay soils due to poor filtration.
• Holes may become clogged with soil.

Recommendations: A popular method among amateur gardeners, especially for watering red and white currants on small plots. Combines well with mulching (Krivko et al., 2014).

4.6. Manual Watering with a Hose or Watering Can

The simplest method is manual watering. However, it requires care:

• Direct the stream under the root, not onto the foliage, to reduce the risk of fungal diseases.
• Water slowly so that water soaks in rather than running off the surface.
• After watering, be sure to loosen the soil or refresh the mulch layer.

Important: Avoid watering with cold water straight from a well – it can cause shock to the plants (Buckingham, 2010). Allow water to settle and warm up in the sun for at least a few hours.

4.7. Moisture‑Charging Irrigation (Special Case)

This is not so much a method as a special technique applied in late autumn. The main task is to deeply (to 60–70 cm) saturate the soil with moisture before winter. It is most often carried out:

• By furrows – water is supplied slowly to penetrate deeper.
• By sprinkling – only in dry weather, when foliage has already fallen (Trunov and Samoshchenkov, 2012).
• Under the root – with a small number of bushes.

Moisture‑charging irrigation is discussed in more detail in the section on norms and frequency of watering.

Comparative Table of Watering Methods

General Rules for All Methods

1. Water no more than 1–2 times a week, but abundantly, so that water penetrates to a depth of 30–40 cm. Shallow waterings only do harm (Buckingham, 2010).

2. Best time – early morning or evening, so that moisture does not evaporate too quickly (Tarasov et al., 1981).

3. Water should be warm – use settled water warmed by the sun. Cold water from a well or borehole can stress the plants.

4. After watering, be sure to loosen the soil (if mulch is not used) or refresh the mulch layer to prevent evaporation and crust formation.

In the next section, we will consider watering rates and frequency, as well as the optimal timing for watering according to the developmental phases of currants.

5.1. Watering Rates

5.2. Watering Frequency

Watering frequency is determined by weather, soil type, and plant developmental stage.

5.3. Optimal Time for Watering

5.4. Watering in Hot Weather

At temperatures above 30 °C and no rainfall:

1. Frequency – once every 2–3 days, but the rate can be slightly reduced (e.g., 2–3 buckets per bush instead of 4–5) to avoid water stagnation.

2. Time – strictly early morning or late evening.

3. Additionally – light spraying of the crown in the evening is useful to increase air humidity, but only in dry weather and provided leaves dry quickly (Buckingham, 2010).

4. Mulch – be sure to refresh the mulch layer to reduce evaporation (see section 6).

5.5. Watering in Rainy Weather

In rainy periods, watering is completely excluded. The main task is to ensure drainage of excess water:

• Check and clean drainage ditches.
• In case of water stagnation, make additional ditches to drain moisture.
• Loosen the soil around the bushes to improve aeration.

5.6. Moisture‑Charging Irrigation (Autumn)

When: 2–3 weeks before stable frosts (usually October – early November) (Trunov and Samoshchenkov, 2012).

Rate: 50–60 L per mature bush (5–6 buckets) to wet the soil to a depth of 60–70 cm (Potapov et al., 2000).

Method: furrow or under‑root watering with slow water supply is preferable. Sprinkling is less effective, as evaporation is lower in autumn, and part of the water may not have time to soak in.

Purpose:

• Moist soil freezes less, protecting roots.
• Provides moisture reserve for spring.
• Improves wintering and spring start conditions (Kurennoi et al., 1985).

Specifics for golden currant: it needs moisture‑charging irrigation less, but in arid regions and with a dry autumn, it is also beneficial (Dan’kov et al., 2015).

5.7. Summary Table of Rates and Frequency

Proper rates and frequency of watering ensure that currants receive exactly as much moisture as they need, without stress from drying out or over‑watering. In the next section, we will consider how to reduce moisture losses – effective techniques of mulching and soil management that help retain moisture and reduce the number of waterings.

6.1. Mulching – The Main Moisture‑Retention Technique

Mulching is covering the soil surface around the bushes with a layer of organic or synthetic materials. This is one of the most effective ways to reduce moisture losses (Buckingham, 2010).

6.2. Timely Soil Loosening

Purpose: loosening breaks the soil crust that forms after watering or rain and prevents capillary rise of water with subsequent evaporation. This is the so‑called “dry irrigation” – loosening conserves soil moisture almost as effectively as watering (Potapov et al., 2000).

Loosening rules:

• Depth: 5–8 cm in the near‑stem zone, 10–12 cm in the inter‑rows (Tarasov et al., 1981; Kurennoi et al., 1985).
• Frequency: after each rain or watering, as soon as the soil has dried and no longer sticks to the tool.
• Special note: loosening should be done carefully, without damaging the surface roots of currants. Red and white currant roots are particularly sensitive to damage.

Important: loosening does not replace mulching but complements it. On mulched soil, loosening is not required (Buckingham, 2010).

6.3. Weed Control

Weeds are serious competitors for moisture. They consume large amounts of water, especially in hot weather, and can reduce watering efficiency by 20–30% (Potapov et al., 2000).

Control methods:

• Mulching – reliably suppresses weeds (see above).
• Manual weeding – pull out weeds with roots, especially in the near‑stem zone (Buckingham, 2010).
• Loosening – cuts weeds at early stages.
• Herbicides – on commercial plantations. For amateur plots, mechanical methods are preferable.

Important: do not allow weeds to flower, so they do not produce seeds and spread.

6.4. Correct Site Selection and Planting

Even at the planting stage, it is important to consider factors affecting moisture retention:

• Choose level terrain or gentle slopes (up to 5–8°) so that water does not run off too quickly (Kurennoi et al., 1985).
• Avoid south‑facing slopes in arid regions – moisture evaporates faster there (Trunov and Samoshchenkov, 2012).
• Optimal groundwater depth: at least 1.5 m from the surface (Potapov et al., 2000).
• Create windbreak strips (curtains) of corn, sunflower, or other tall plants – wind increases evaporation (Trunov and Samoshchenkov, 2012).

6.5. Planting with Deepening (for Black and Red Currants)

When planting black currant, it is recommended to deepen the root collar by 6–8 cm to stimulate the formation of additional roots and increase the root system volume (Kurennoi et al., 1985). For red and white currants, deepening is less – 3–5 cm. For golden currant – up to 6–8 cm (Dan’kov et al., 2015).

How this helps retain moisture: a more powerful and deeper root system allows plants to extract moisture from deeper soil layers, increasing drought tolerance.

6.6. Snow Retention (Winter)

Snow is a natural moisture reservoir. Proper snow retention increases soil moisture reserves in spring by 30–50% (Tarasov et al., 1981).

Snow retention techniques:

• Leave tall plant curtains (sunflower, corn) for winter.
• Place branches, brushwood, or shields across the prevailing wind direction.
• On sloping plots, make snow banks across the slope.

Specifics for currants: red, white, and golden currants are more winter‑hardy than black currants, but snow retention is useful for all species, especially in low‑snow winters (Dan’kov et al., 2015).

6.7. Dense Planting and Narrow‑Strip Placement

In commercial horticulture, dense planting schemes for currants are used with distances between bushes of 0.6–0.8 m and row spacing of 2–2.5 m (Kurennoi et al., 1985; Trunov and Samoshchenkov, 2012). With such a scheme, plants close up faster, forming continuous strips that:

• Reduce evaporation from the soil surface.
• Create a microclimate with higher air humidity.
• Shade the soil and prevent weed growth.

On small plots, this principle can also be applied: plant bushes more densely, but do not allow crown thickening to avoid diseases (Buckingham, 2010).

6.8. Choosing Varieties with Increased Drought Tolerance

For regions with hot and dry climates, preference should be given to golden currant, which is the most drought‑tolerant among all currant species (Dan’kov et al., 2015; Krivko et al., 2014).

Among red and white currants, there are also varieties that tolerate dry conditions better (e.g., varieties derived from Ribes petraeum) (Kurennoi et al., 1985). When choosing a variety for your region, check its drought tolerance at local nurseries.

6.9. Summary Table of Moisture‑Retention Methods

6.10. General Recommendations

1. Always mulch: even a simple layer of mown grass or humus 5–7 cm thick significantly reduces evaporation (Buckingham, 2010).

2. Do not loosen mulched soil – this disturbs the mulch structure.

3. Renew mulch in spring and autumn to maintain its protective properties.

4. Remove weeds at the seedling stage before they develop a strong root system and start actively taking moisture.

5. In arid regions, use drip irrigation combined with film or agrotextile – this is the most effective combination for moisture conservation (Trunov and Samoshchenkov, 2012).

6. Consider species specifics: for golden currant, mulching is especially useful, as it is already drought‑tolerant, and mulch helps retain moisture during the most critical periods – berry filling and bud set (Dan’kov et al., 2015).

Proper soil moisture management is not only about watering but also a set of measures to conserve it. Using these techniques, you can reduce watering frequency by 30–50% and still provide plants with sufficient moisture.

7.1. Symptoms of Moisture Deficit

7.2. Symptoms of Excess Moisture

Excess moisture is often more dangerous than deficiency, as it leads to root damage and fungal diseases (Trunov and Samoshchenkov, 2012).

7.3. Comparative Table of Symptoms

7.4. Specifics for Different Currant Species

7.5. Algorithm of Actions When Symptoms Are Detected

Step 1. Identify the problem

• Inspect the plant: leaves, shoots, berries.
• Check soil moisture using the “pinch” method (see section 3).

Step 2. Choose a solution

Step 3. Observe the response

• After adjusting watering, plant condition should improve within 3–5 days.
• If no improvement – the cause may be diseases, pests, or other issues (Buckingham, 2010).

7.6. Prevention of Moisture Problems

Prevention is better than cure. To avoid extremes in watering:

1. Regularly check soil moisture using the “pinch” method, especially during critical periods (flowering, berry filling, autumn).

2. Always mulch the near‑stem circles – this smooths out moisture and temperature fluctuations.

3. Ensure good drainage when planting – on heavy soils add sand or plant on raised beds.

4. Water rarely but abundantly – this encourages deep root growth and increases drought tolerance.

5. Consider the weather – adjust watering according to rainfall and temperature.

6. Consider species specifics – golden currant needs less water than red and white.

Understanding the symptoms of moisture deficit and excess is a key skill for the gardener, allowing rapid response to problems and maintaining plant health. In the next section, we will look at combining watering with fertilisation (fertigation) – an effective way to simultaneously provide plants with moisture and nutrients.

8.1. Advantages of Fertigation

Combining watering with fertilisation provides several important benefits:

• Uniform distribution of nutrients – fertilisers go directly to the active root zone, rather than being spread on the surface, where they may be unavailable to plants or washed away by rain (Potapov et al., 2000).
• Fertiliser saving – with fertigation, fertiliser uptake increases by 30–50% compared to surface application. This is because nutrients immediately enter solution and are available for root absorption (Huang, 2012).
• Reduced stress – nutrients are supplied gradually, in small doses, eliminating the risk of root “burn” from excessive fertiliser concentration (Trunov and Samoshchenkov, 2012).
• Labour saving – combining two operations (watering and fertilisation) saves time and effort.
• Possibility of precise dosing – especially important with drip irrigation, where you can set the exact fertiliser concentration for each growth stage (Buckingham, 2010).

8.2. Which Fertilisers to Use for Fertigation

For fertigation, use water‑soluble fertiliser forms that completely dissolve in water and do not clog drippers or sprayers.

8.3. Fertigation Schedule by Growth Phases

It is important to choose fertiliser composition according to the growth phase of currants. Requirements for nitrogen (N), phosphorus (P), and potassium (K) change during the season (Kurennoi et al., 1985; Tarasov et al., 1981).

(Sources: Kurennoi et al., 1985; Potapov et al., 2000; Trunov and Samoshchenkov, 2012)

8.4. Fertigation Methods

8.5. Fertigation Specifics for Different Species

8.6. Precautions When Fertigating

1. Do not exceed the concentration – too strong a solution can cause root burn (especially on sandy soils, where salts concentrate). The optimal concentration for most fertilisers is 0.5–1.5 g per 1 L water (Potapov et al., 2000).

2. Apply fertigation after the main watering – first supply clean water (to wet the soil), then fertiliser solution, and again clean water (to flush the system and evenly distribute nutrients) (Trunov and Samoshchenkov, 2012).

3. Alternate fertigation with ordinary waterings – do not fertilise at every watering. For mature bushes, 1 fertilisation every 2–3 weeks is sufficient (Buckingham, 2010).

4. Do not fertigate in dry weather – if the soil is very dry, first water with clean water, and only after 2–3 hours apply fertilisers to avoid root burn.

5. Consider soil acidity – on alkaline soils, some microelements (iron, manganese) may be unavailable. Use chelated forms of microelements (Huang, 2012).

8.7. Organic Fertilisers with Watering

For gardeners who prefer organic options, combinations of watering with organic fertilisers are possible:

• Manure infusion (1:10) – diluted infusion is added to irrigation water. Rate: 1–2 L of infusion per 10 L water.
• Poultry manure infusion (1:20) – more concentrated, requires strong dilution.
• Ash infusion (200–300 g ash per 10 L water) – steep for 2–3 days, then use for under‑root watering.

Important: Organic infusions must be strained before use in drip irrigation systems to avoid clogging drippers. For under‑root watering, they can be used without filtration (Kurennoi et al., 1985).

8.8. Typical Fertigation Mistakes

8.9. Recommendations for Seasonal Fertigation Schedule

Below is an approximate schedule for a mature plantation of red/white/golden currants (for the middle zone):

(Sources: Kurennoi et al., 1985; Trunov and Samoshchenkov, 2012)

Fertigation is a modern and efficient method that allows simultaneous saving of water, fertilisers, and time. With proper use, it significantly increases the yield and quality of berries of red, white, and golden currants.

9.1. Common Mistakes in Watering Currants

9.2. Frequently Asked Questions (FAQ)

9.3. Brief Reminder for Watering Currants

9.4. Three Main Principles of Successful Watering

To summarise, remember three key rules that will help you avoid most problems:

1. Rarely, but abundantly. One deep watering per week is better than daily shallow ones.

2. Check, do not guess. Use the simple “pinch” method – it is more reliable than any watering calendars.

3. Always mulch. Mulch is your best helper in moisture retention, weed control, and soil improvement.

By following these recommendations, you will be able to provide red, white, and golden currants with the necessary amount of moisture at each developmental stage, obtaining stable and high yields of tasty and healthy berries. Happy gardening!