Care

Timely Cultivation

Cultivation (or hoeing) is the foundation of soil care. Its main goals are to break the soil crust, ensure air access to the roots, and destroy weed seedlings.

Why it's needed: The soil crust that forms after rain or irrigation impedes gas exchange, slowing root growth and the activity of beneficial soil microorganisms. Regular, shallow cultivation (3–7 cm deep) restores soil structure and conserves moisture (Dankov, 2015).

How and when to do it:

• Early Spring: Harrow or lightly cultivate as soon as the soil condition allows. This breaks the crust, seals in moisture, and triggers weed growth, which can be easily removed during the next cultivation (Yaroslavtsev, 2003).
• During the Growing Season: Cultivate as needed, but there is one crucial prohibition. Never cultivate the soil during flowering, fruit set, and berry swelling (from late spring until the start of harvest). During this period, raspberry roots are particularly sensitive. Even shallow damage can reduce yield (Crandall, 1994). All major soil work in the rows must be completed before this time.
• After Harvest: Cultivation resumes but should be done shallowly and stopped by early September. The purpose of late cultivation is not to stimulate shoot growth but to prepare the soil for winter. Late cultivation can provoke the growth of new shoots that won't mature before the cold and will freeze (Yaroslavtsev, 2003; Crandall, 1994).

Combating Soil Compaction

Soil compaction is the main enemy of the raspberry root system. It occurs from walking in the rows when the soil is wet, frequent watering with a high-pressure hose, or natural soil settling. Dense soil poorly conducts air and water, leading to stunted growth and reduced yields.

• Prevention: The main rule is never work with wet soil. Cultivate and especially dig only when it has sufficiently dried out. A simple test: squeeze a handful of soil — if it crumbles, you can work; if it clumps, it's still too wet.
• Restoring Structure: In large plantings with mechanized cultivation, deep cultivation (10–12 cm) using a special subsoil cultivator (ripper) is employed in the inter-rows to combat compaction. This operation is carried out in the fall, in dry weather, so roots can recover before the next season (Crandall, 1994). In a home garden, garden forks can be used for the same purpose, carefully piercing the soil in the inter-rows to a depth of 20–30 cm.

Pre-Planting Soil Preparation and Tillage Features

The quality of the soil you plant raspberries in will determine their productivity for many years. Therefore, site preparation should begin in advance.

• Deep Digging: Before planting, dig the soil to a depth of 25–30 cm. This creates a deep, loose layer into which roots can easily penetrate. Incorporate the main dose of organic fertilizers (well-rotted manure or compost) and phosphorus-potassium fertilizers into this layer (Yaroslavtsev, 2003). This will nourish the plant for several years.
• Drainage: Raspberries do not tolerate standing water around the roots. If the water table is high (closer than 1 m from the surface) or the soil is heavy clay, drainage is necessary. You can create drainage ditches or plant raspberries on raised beds. Add sand to heavy soils when digging (Yaroslavtsev, 2003).
• Pre-Planting Weed Control: The most important task to do before planting is eradicating perennial weeds (especially couch grass and sow thistle). Doing this on an already planted site is much more difficult (Crandall, 1994). Use all available methods: thorough digging with rhizome removal, broad-spectrum herbicides a year before planting, or growing competitive cover crops. A clean start ensures easier care in the future.

Summary: Soil management for raspberries is primarily about care and timeliness. Spring — early cultivation. Summer — complete rest for the soil around the bushes to avoid disturbing roots. Autumn — light cultivation and winter preparation. And always remember: it's better to mulch one extra time than to dig one extra time.

Benefits of Mulching

A properly chosen and applied layer of mulch provides tangible benefits:

• Moisture Conservation: Mulch protects the soil from direct sunlight and wind, significantly reducing evaporation. Soil moisture under mulch remains stable longer, which is especially important during flowering and berry swelling (Crandall, 1994; Yaroslavtsev, 2003). This reduces the number of waterings needed.
• Weed Suppression: A dense layer of mulch (especially opaque ones) physically prevents weed seeds from germinating and suppresses their growth. This keeps the root zone clean without laborious weeding (Yaroslavtsev, 2003).
• Controlling Root Suckers: This is a key point for raspberries. Mulch, especially black film or a thick layer of organic materials, inhibits the growth of root suckers outside the designated row area. This simplifies shoot thinning and prevents the raspberry patch from turning into an impenetrable thicket (Yaroslavtsev, 2003).
• Temperature Regulation: Mulch protects roots from overheating in summer heat and acts as additional insulation, moderating temperature fluctuations in autumn and winter. This is particularly important in snowless winters (Yaroslavtsev, 2003).
• Improving Soil Structure: Organic mulch (compost, manure, wood chips), as it decomposes, becomes a source of humus and improves soil structure, making it looser and more fertile. It also serves as food for earthworms and beneficial soil microorganisms (Martin, 2019).

Mulching Materials

The choice of material depends on your goals, availability, and cost. They generally fall into organic and inorganic categories.

Organic Mulch:

• Compost or Well-Rotted Manure: The most valuable option. It not only mulches but also fertilizes the plants. A 3–5 cm layer around the bushes provides a slow release of nutrients. However, compost may contain weed seeds (if not prepared properly).
• Straw or Hay: An excellent material for inter-rows. It creates a thick airy layer, conserves moisture well, and suppresses weeds. Disadvantages: may attract rodents and contain seeds. Straw is not recommended near the stems as it decomposes slowly and could cause damage.
• Sawdust and Wood Chips (especially ramial): Retain moisture well and last a long time. Ramial wood chips (from small branches, less than 3 cm in diameter) are considered the best choice for perennial plantings, as they enrich the soil with organic matter during decomposition without depleting it (Martin, 2019). Sawdust and chips acidify the soil, which is not harmful to raspberries but may require additional nitrogen application, as the decomposition process uses soil nitrogen. Common practice is to use them in inter-rows, rather than right next to the canes.
• Peat: Particularly useful on light sandy soils for moisture retention. It also acidifies the soil, which is favorable for raspberries.

Inorganic Mulch:

• Black Polyethylene Film: The most effective way to control weeds and restrict root suckers in the row. Film warms the soil well in spring. However, it is impermeable to air and prevents evaporation, which can lead to root overheating and reduced yield in hot weather. This method requires strict control and is not suitable for southern regions with hot climates (Yaroslavtsev, 2003).
• Non-Woven Fabrics (spunbond, agro-textile): A more modern option. They allow air and water through but prevent weed growth. Such materials typically last 3–5 years.
• Mulch Paper: A biodegradable option that decomposes into the soil, enriching it. Good for temporary use.

How and When to Refresh Mulch

The mulch layer should not be neglected. It needs to be maintained in good condition.

• Spring Renewal: Major mulching is done in early spring, before the start of the growing season. Loosen the soil, remove weeds, apply fertilizers, and only then lay down a new layer of mulch (Yaroslavtsev, 2003).
• Top-ups: During the season, the mulch layer can settle and decompose. It needs to be topped up to maintain the optimal thickness. For organic mulch, the optimal thickness is 5–10 cm. A thicker layer can hinder air access to the roots.
• Autumn Replacement (if needed): If non-decomposing materials (e.g., straw) were used, which could become a place for pests to overwinter, remove them, loosen the soil, and lay down a new layer. In other cases, simply add fresh organic mulch on top, working the old layer into the soil (Yaroslavtsev, 2003).

Important Note: Organic mulch, especially from sawdust or straw, consumes nitrogen from the soil as it decomposes. Therefore, when using such materials in spring, be sure to apply nitrogen fertilizers (urea, ammonium nitrate) at a rate of 8–10 g per 1 m² to compensate for this loss and prevent nitrogen starvation in the raspberries (Yaroslavtsev, 2003).

Summary: Mulching is a comprehensive tool that solves several problems at once: saves water, controls weeds, improves the soil, and simplifies care. The right material and timely renewal are key to the health and high productivity of your raspberry patch.

Why Weeds Are So Dangerous for Raspberries

• Competition for Moisture and Nutrients: The raspberry root system is shallow (most roots are in the 10–20 cm layer). This is the same horizon where many annual and perennial weeds actively feed. During dry periods, weeds dry out the soil faster than raspberries can access the moisture, which is especially critical during berry swelling and young shoot growth (Crandall, 1994).
• Impaired Light Conditions: Tall weeds (e.g., lamb's quarters, hemp, mugwort) shade the lower canopy of raspberries, impairing photosynthesis and reducing the formation of flower buds for the next year. This is particularly relevant for young replacement canes, which need light for proper development.
• Source of Diseases and Pests: Many weeds serve as intermediate hosts for fungal pathogens (e.g., rust) and as feeding sites for pests (raspberry beetle, aphids, spider mites). Weeds also create a microclimate with higher humidity, favoring fungal infections (Dankov, 2015).
• Complicating Care and Harvest: Weed thickets hinder spraying, trellising, and most importantly, berry picking. In neglected plantings, harvesting becomes extremely inconvenient, and some berries are lost.

Main Weed Control Strategies

Effective weed control requires a combined approach. The ideal strategy is to prevent their mass appearance using preventative measures and, when necessary, mechanical or chemical methods.

1. Prevention: Pre-Planting Preparation

This is the most important stage. Removing perennial rhizomatous weeds (couch grass, sow thistle, bindweed) after planting raspberries is extremely difficult, as cultivation in the row is restricted and herbicide application is risky (Crandall, 1994). A year before planting, clear the site as thoroughly as possible: deep dig with rhizome removal, use broad-spectrum herbicides (as per instructions), or grow cover crops that suppress weeds. A clean start ensures easy care for years to come.

2. Mechanical Methods (Cultivation)

• Hoeing and Weeding: In spring and after harvest, when raspberry roots are less sensitive, weed the rows and cultivate the inter-rows. In inter-rows, this can be done with a hoe or cultivator to a depth of no more than 5–7 cm to avoid damaging the horizontal raspberry roots (Yaroslavtsev, 2003). In the row, weeds are removed by hand.
• Critical Timing: It is crucial to weed before weeds start flowering and seeding. One weed plant can produce thousands of seeds that will germinate for years.
• Limitations: During flowering and fruiting, mechanical cultivation in the row is prohibited due to the risk of root damage (Crandall, 1994). At this time, mulch becomes the primary tool.

3. Chemical Methods (Herbicides)

Herbicide application on raspberries requires extreme caution and strict adherence to instructions. Only products officially approved for use on this crop can be used (Dankov, 2015). Non-compliance can lead to plant death or a ban on selling the harvest.

• Selective Herbicides: These are the safest option. There are products that kill grass weeds (e.g., couch grass) without harming broadleaf crops, and vice versa. Their use requires precise dosage and timing based on the weed's growth stage (Crandall, 1994).
• Non-Selective Herbicides: Products based on glyphosate (e.g., Roundup) can only be used spot-wise, to remove particularly stubborn individual weeds, or for treating inter-rows during the complete dormancy period of raspberries (early spring before bud break or late autumn). The bushes themselves must be protected from spray drift (Funt, 2013).
• Important Caution: Using herbicides as the primary control method is not recommended. They should only supplement mechanical and agronomic practices. Over-reliance on chemicals can harm soil microflora and the plants themselves.

4. Biological Methods: Mulch and Cover Crops

These are the safest and most environmentally friendly ways.

• Mulching: As discussed in the previous chapter, a dense layer of mulch (at least 5 cm) effectively suppresses the growth of most annual weeds and inhibits perennials. This is especially important during fruiting when other methods are unavailable (Yaroslavtsev, 2003).
• Inter-Row Sowing (Green Manure): Instead of constantly fighting weeds in the inter-rows, sow them with lawn grasses (bluegrass, fescue) or clover. These plants create a dense sod that prevents weed germination, improves soil structure, and serves as green manure when mowed (Yaroslavtsev, 2003; Crandall, 1994).

Practical Recommendations

1. Spring: Early cultivation in rows and inter-rows to destroy weed seedlings. Herbicide application (if necessary) before the start of the growing season.

2. Summer (before flowering): Regular weeding in the row, maintaining mulch in good condition. Mowing grass in inter-rows (if using sod) to prevent flowering and seeding.

3. Summer (flowering and fruiting period): Weed control only through mulch. Hand-pulling large weeds that break through the mulch.

4. Autumn: After harvest, remove all spent canes and plant debris, which can serve as shelter for weeds and pests. Cultivate the inter-rows and, if necessary, sow cover crops.

Summary: Weed control in raspberries is not a one-time event but an ongoing process. The key to success is prevention (clean site before planting, using mulch) and combining methods (mechanical, chemical where justified, and biological). A clean raspberry patch is not only attractive but also the basis for stable, high-quality yields.

Why Trellising and Support Are Needed

• Preserving the Harvest: Supported canes do not break under the weight of berries and do not fall to the ground, where berries get dirty and rot. This is especially important for varieties with drooping tips (e.g., 'Novost Kuzmina'), which bend almost to the ground under the weight of fruit (Yaroslavtsev, 2003).
• Improving Light Exposure: On a trellis, canes are positioned vertically or at an angle, ensuring even light distribution across all levels of the bush. This promotes better berry ripening, more uniform maturation, and higher sugar content. Good light is also crucial for setting flower buds for the next year (Yaroslavtsev, 2003).
• Disease Prevention: Vertical cane positioning improves air circulation through the canopy. Leaves and berries dry faster after rain or watering, reducing the risk of fungal infections (gray mold, anthracnose, purple blotch) (Funt, 2013).
• Simplifying Care and Harvest: Pruning, removing spent canes, pest control, and most importantly, berry picking are easier on a trellis. All berries are visible and accessible.
• Separating Canes: The trellis allows for mechanical separation of fruiting canes (last year's) from young suckers (this year's). This simplifies management (e.g., cane thinning) and helps control pests that may affect canes of different ages.

Types of Supports and Trellis Construction

There are several main methods of supporting raspberries, the choice of which depends on the variety, planting type, and gardener's goals.

1. Single Stake Support (Stool Method)

• Description: A sturdy stake (wooden or metal) is driven into the center of each bush. All fruiting canes of one bush are gathered into a bundle and tied to the stake (Yaroslavtsev, 2003).
• Advantages: Simplicity and accessibility. The bush looks tidy and is accessible for care from all sides.
• Disadvantages: Inner canes in the bundle are shaded and poorly ventilated. Canes may be damaged by rubbing against the stake in strong winds. This method is best suited for varieties with strong, upright canes.

2. Single- and Double-Trellis (Row Method)

This is the most common and effective method for larger plantings and varieties with many canes.

• Construction: Sturdy posts (2–2.2 m high) are installed along the row 5–10 meters apart. Wire (2–3 mm diameter) or strong twine is stretched between them (Yaroslavtsev, 2003).
• Single-Trellis: The wire is stretched in a single vertical plane. Canes are tied to this wire.
• Vertical Training: Canes are simply tied to the stretched wire.
• "Braid" or "Weave" Training: Fruiting canes are passed between two parallel strands of twine or wire held together by staples. Young canes grow freely on the sides. This allows for easy removal of spent canes in autumn (Yaroslavtsev, 2003).
• Double (V-Trellis): Posts are installed in pairs with a slight outward lean, forming a V-shape. Canes are tied to the wire on each side. This provides better light exposure, air access, and allows for more canes. Resulting berries are larger and yields higher (Yaroslavtsev, 2003).

3. Horizontal Trellis (Lincoln-Style)

• Description: This is a more complex construction where posts are L-shaped. Canes are bent and tied horizontally at a height of 40–50 cm from the ground (Yaroslavtsev, 2003).
• Advantages: All fruiting laterals on a horizontally positioned cane receive equal light and grow vertically upward. This leads to the formation of a large number of flower buds and, consequently, high yields. Berries are positioned at a convenient height for picking (70–80 cm). Replacement canes grow separately, simplifying management.

How to Properly Tie Canes

The tying technique is as important as the trellis construction itself.

• Timing: The main tying is done in early spring, before bud break, when canes are still flexible and easy to guide. Pruning and thinning should be completed by this time (Yaroslavtsev, 2003).
• Thinning Before Training: Leave 10–15 of the strongest and healthiest canes per meter of row (depending on variety and planting scheme) (Dankov, 2015). Remove all weak, diseased, and excess canes.
• Materials: Use soft twine, fabric strips, or special garden clips. Do not use rigid wire, as it can constrict and damage the cane bark.
• Attachment Methods:
• Weaving: The cane is simply woven between two strands of twine or wire. This is the fastest method.
• Figure-Eight Tie: Twine is attached to the support, then one end is wrapped around the cane and then around the support, forming a figure-eight. This allows the cane some freedom to grow and prevents rubbing against the support.
• Spacing Canes: When tying, try to space the canes evenly along the trellis so they don't shade each other. They can be arranged in a fan pattern or alternated, tying them to different wire levels.

Important Rule: Only tie fruiting canes (last year's). Young replacement canes (this year's) should not be tied — they should grow freely. This makes their autumn removal easier and allows them to develop better.

Horizontal Trellis with Regulated Periodicity of Fruiting (RPF) Technology

This technology, developed for commercial plantations, deserves special mention. Its essence lies in alternating a "growth year" (where only young canes are grown) and a "fruiting year" (where only fruiting canes are kept) (Yaroslavtsev, 2003). The horizontal trellis is ideal for this method.

• Advantages: Complete separation of young and fruiting canes. In the "fruiting year," up to 20–25 canes per meter of row can be kept, increasing yield 2–3 times compared to traditional methods. Berries are large and clean. This method also facilitates mechanized harvesting.

Summary: Trellises and proper training are not just a way to support the bush but a powerful agronomic practice that increases yield and simplifies care. Choosing the right trellis construction and timely, proper training are key to plant health, berry quality, and ease of work in the raspberry patch.

What Are Root Suckers and Why Manage Them

Root suckers (or root sprouts) are young shoots that develop from adventitious buds located on the horizontal roots of the raspberry (Dankov, 2015). They are the primary means of vegetative propagation. Depending on the variety and growing conditions, the number of suckers can range from a few to dozens per bush.

Uncontrolled sucker growth leads to negative consequences:

• Overcrowding: Too many shoots per unit area create competition for light, water, and nutrients. Consequently, all shoots (both fruiting and young) receive fewer resources, leading to reduced yields and berry quality (Yaroslavtsev, 2003).
• Poor Microclimate: Dense thickets are poorly ventilated, creating favorable conditions for fungal diseases (gray mold, purple blotch) and pest proliferation (raspberry beetle, spider mites) (Funt, 2013).
• Complicated Care and Harvest: In overgrown raspberries, pruning, trellising, pest/disease control, and harvesting are extremely difficult. Some yield is lost, and the quality of remaining berries declines.
• Depleting the Mother Plant: A large number of suckers diverts a significant portion of nutrients and water from the main bush, weakening it and reducing the longevity of the plantation.

Biological Basis: Why Raspberries Produce Suckers

Understanding the reasons for sucker production helps manage the process.

• Varietal Characteristics: There are varieties with high (e.g., 'Kirzhach', 'Lazarevskaya'), medium ('Novost Kuzmina', 'Gusar'), and low ('Kaliningradskaya', 'Tarusa') sucker-producing ability (Yaroslavtsev, 2003). Consider this factor when choosing a variety for your site.
• Plant Age: Young plants (first 2–3 years) produce fewer suckers than mature ones. The peak of sucker production occurs during the 4th–7th year of the bush's life.
• Growing Conditions: Excessive nitrogen nutrition, overly frequent watering, and root damage during cultivation stimulate the formation of more suckers.
• Planting Depth: If planted too deep, the root collar is buried, and extra suckers may grow from dormant buds on the stem, complicating control.

How to Manage Root Suckers

Managing suckers is an ongoing process involving several approaches.

1. Removing Excess Suckers

This is the primary and most effective control method. It is done in several stages throughout the growing season.

• Timing: Start removing suckers in spring as soon as they reach 5–10 cm in height (Yaroslavtsev, 2003). Removal at this stage is called thinning. Repeat the procedure as new suckers appear, usually 2–3 times during the season (May–June) (Dankov, 2015).
• How to Remove Properly: The most reliable method is to cut the sucker below the soil level, trying to remove the part of the root from which it is growing. If you simply cut it off above ground, a new, even stronger shoot will grow from the remaining underground part. Do this work manually using pruners or a sharp knife (Yaroslavtsev, 2003).
• Row Thinning: For row planting, it is recommended to keep the row strip 30–40 cm wide, within which the shoots should grow (Dankov, 2015). Remove all suckers appearing outside this strip (in the inter-rows). Optimal density is 10–15 shoots per meter of row for fruiting (Yaroslavtsev, 2003).

2. Using Chemical Methods (Desiccation)

This method is mainly used in commercial raspberry growing to suppress young shoot growth in the fruiting year.

• Essence of the Method: When young shoots reach 5–15 cm in height, they are sprayed with special preparations (e.g., high concentrations of ammonium nitrate solution or other desiccants). This kills or strongly inhibits the growth of young suckers while the fruiting canes are unaffected (Dankov, 2015).
• Result: All nutrients and moisture are directed towards berry development. Yield can increase 1.5 times, berries become larger, and harvesting is easier due to the absence of interfering suckers. However, this method requires high skill and precise adherence to application guidelines, so it is rarely used in home gardens.

3. Prevention: Mulching and Root Restriction

• Mulching: As mentioned, a dense layer of mulch (especially black film or agro-textile) effectively suppresses sucker emergence outside the row. This facilitates manual thinning, as suckers appear only where light is accessible (Yaroslavtsev, 2003).
• Root Restriction: For complete control over raspberry spread, physical barriers can be used. When planting, bury sheets of slate, corrugated iron, or thick film along the trench walls (or around the plot perimeter) to a depth of 40–50 cm (Yaroslavtsev, 2003). This prevents roots from spreading sideways. However, this method requires high initial investment and is not always practical.

Alternation: Technology with Regulated Periodicity of Fruiting (RPF)

This approach, based on sucker control, deserves special attention. It is used both in large farms and in home gardens.

• Principle: Two plantations (or two sections within one plantation) are established. In one year, on one plot, only young canes are grown (growth year), while on the other, the crop is harvested from fruiting canes (fruiting year). The following year, the plots switch roles (Yaroslavtsev, 2003).
• In the Fruiting Year: All young suckers are removed as soon as they appear. This allows maximum resources to be directed towards the crop, which becomes very high.
• In the Growth Year: All young suckers are left to form powerful canes that will produce the next year's crop. They are regularly watered, fed, and not pruned.
• Advantages: Complete separation of functions allows for a yield 2–3 times higher in the fruiting year compared to traditional methods, and also facilitates pest and disease control (Yaroslavtsev, 2003).

Summary: Managing root suckers is not just fighting a "weed" but a strategic element of managing the productivity of the raspberry patch. Timely removal of excess shoots allows the plant not to waste energy and to direct it towards forming large, sweet berries. By controlling suckers, the gardener controls the harvest.

Protection from Heat and Drought

Raspberries do not tolerate prolonged drought and high temperatures well. In hot, dry weather, plants experience severe water stress, leading to:

• Berry Shrinking and Quality Decline: Berries become dry, sour, and small (Funt, 2013).
• Weak Shoot Growth: Young replacement canes, which will provide next year's crop, grow weakly with short internodes. This reduces future yields (Crandall, 1994).
• Poor Flower Bud Formation: Under moisture deficit, the plant sets fewer flower buds, which will also affect next year's harvest (Funt, 2013).

How to Protect:

• Regular Irrigation: This is the most important protection against heat. During hot periods, the raspberry's need for moisture increases sharply, especially during flowering and berry swelling. Watering should be abundant enough to wet the root zone (to a depth of 30–40 cm). On average, in hot weather, water 1–2 times a week at a rate of 30–40 liters per 1 m² (or 3–4 buckets per bush).
• Proper Watering Time: Water early in the morning or evening to reduce evaporation losses. In hot weather, overhead watering (sprinkling) can cause leaf scorch, so root watering or furrow irrigation is preferable.
• Mulching: As discussed, mulch protects the soil from overheating and significantly reduces moisture evaporation. A 5–10 cm layer of mulch is a reliable insurance against drying out.
• Variety Adaptation: In hot regions, choose varieties tolerant to high temperatures. For example, the variety 'Heritage' flowers and fruits better at higher temperatures (up to +29°C) than some others (Funt, 2013). In regions with very hot summers, preference is given to varieties that do not suffer from "sunscald" of the fruit — where white, dry patches appear on the berries (Funt, 2013).

Protection from Winter Frosts

The winter hardiness of raspberries varies by variety. Most varieties withstand frosts down to -30…-35°C in a state of deep dormancy. However, sharp temperature fluctuations, snowless winters, and late spring frosts can be detrimental (Dankov, 2015).

• Main Danger: Freezing of buds, especially at the tops of canes, and damage to the root system when the soil freezes to the depth where roots are located. Raspberry roots are significantly less frost-hardy than the above-ground parts (Dankov, 2015).
• Critical Period: The highest risk of winter damage occurs in late winter – early spring, when frosts are interrupted by thaws, and then cold returns. During this period, plants lose their hardiness, and even mild frosts can kill buds (Yaroslavtsev, 2003).

Protection Methods:

• Bending Canes: This is the primary and most effective protection against winter frosts. Canes are bent to the ground and covered with snow. Snow is the best natural insulator. Canes laid on the ground are carefully tied in bundles and pinned to the ground with metal hooks, bending them as low as possible (to a height of 25–30 cm from the ground) (Yaroslavtsev, 2003). This must be done in autumn, before severe frosts set in, while the canes are still flexible. This work is usually done in September–October, before complete leaf fall (Yaroslavtsev, 2003). Snow-covered canes are protected from freezing (Dankov, 2015).
• Snow Retention: In regions with snowless winters or strong winds, snow retention is necessary. Use shields, create windbreaks, and in winter, shovel snow from the inter-rows onto the rows (Yaroslavtsev, 2003; Dankov, 2015).
• Burying in Snow: After snow cover is established, additionally cover the bent canes with snow taken from the inter-rows. Ensure the canes are completely covered. If an ice crust forms, break it up (e.g., with a rake), as it impedes gas exchange and can cause suffocation or mechanical damage to the canes (Yaroslavtsev, 2003).
• Choosing Hardy Varieties: In regions with severe winters, select varieties that winter well in the local climate without requiring complex cover. For example, varieties bred for local conditions, or everbearing (primocane-fruiting) varieties where the above-ground part can simply be mowed down for winter (Yaroslavtsev, 2003).

Protection from Wind

Strong wind, especially combined with low humidity, dries out canes and leaves, can damage and break stems (especially during fruiting), and in winter, can blow snow off the site. Wind also reduces the activity of pollinating insects (Funt, 2013).

How to Protect:

• Choosing a Sheltered Location: When establishing the raspberry patch, choose sites protected from prevailing winds by natural or artificial barriers (building walls, fences, dense shrubs) (Dankov, 2015).
• Windbreaks: In large plantings, create protective forest belts from fast-growing trees and shrubs (e.g., birch, willow) on the south and west sides (Dankov, 2015).
• Trellis: As noted, the trellis is the best way to protect canes from wind. Properly supported canes do not bend or break under gusts.
• Bending for Winter: In winter, bent canes are less susceptible to wind desiccation and better hold snow.

Protection from Spring Frosts

Raspberry flowers are very sensitive to frost. For most varieties, the critical temperature is -2…-1°C during the budding and flowering stages. Flower damage leads to crop loss.

Protection Methods:

• Site Selection: Low-lying areas (so-called "frost pockets") are more susceptible to frost. Therefore, choose elevated or well-ventilated sites for raspberries, where cold air can drain away (Dankov, 2015).
• Covering: On small plots, use temporary covers of agro-fabric or film at night during forecasted frosts.
• Sprinkler Irrigation: On a commercial scale, overhead irrigation is used to protect against frost. When the irrigation system is turned on as the air temperature drops to 0°C, the water freezing on the flowers releases heat and protects them from damage. This method is effective down to -5°C (Crandall, 1994).
• Smudging: An older, less effective method — creating smoke screens that slightly raise the temperature of the ground-level air layer.

Important: If raspberry flowers are damaged by frost, they will wilt, turn black, and fall off. There will be no crop on these canes. However, this is not a reason to destroy the cane — it may still produce a crop on lateral branches if they survived.

Protection from Snow Load

In regions with heavy snowfall, heavy, wet snow can break unsupported canes or bent stems. Snow that sticks to branches during thaws and then freezes is particularly dangerous.

How to Protect:

• Proper Training: The trellis prevents snow accumulation and cane breakage.
• Shaking Off Snow: During heavy snowfalls, shake snow off the bushes to avoid overloading and breaking branches.
• Bending: Properly bent canes are more likely to survive heavy snow, as the snow cover distributes the load evenly.

Summary: Protecting against adverse weather is a set of measures that starts with proper site and variety selection and ends with timely seasonal operations. The main principles: prevent overheating and drying out in summer, ensure reliable snow cover in winter, and protect flowers from spring frosts. Proper preparation for weather stress is insurance for your harvest.

Winter (Dormancy Period)

In winter, raspberries are in a state of deep dormancy. The main task for the gardener during this period is to ensure the preservation of canes and the root system until spring.

Key Tasks:

• Snow Retention: In regions with snowless winters, it is important to retain snow to cover bent canes and protect roots from freezing. Install shields or shovel snow from the inter-rows onto the rows (Dankov, 2015).
• Monitoring Snow Cover: Ensure that bent canes are completely covered with snow. If an ice crust forms, break it up to prevent disrupting gas exchange and injuring canes (Yaroslavtsev, 2003).
• Rodent Protection: In snowless winters or with abundant mice and hares, cane protection may be needed — wrapping stems or using repellents.

Early Spring (Before Bud Break)

As soon as the snow melts and positive temperatures are established, the most critical period begins. The work done at this time largely determines the current year's harvest.

Key Tasks:

• Lifting Canes: If canes were bent down for winter, carefully lift and straighten them (Yaroslavtsev, 2003).
• Sanitary Pruning and Thinning: Perform final pruning. Remove all frozen, broken, diseased, and weak canes. Thin the remaining ones, leaving 10–15 of the strongest fruiting canes per meter of row (Dankov, 2015).
• Training: Tie the remaining fruiting canes to the trellis (Yaroslavtsev, 2003).
• Fertilizing: Apply nitrogen fertilizers to stimulate growth (8–10 g/m² active ingredient) (Yaroslavtsev, 2003).
• Disease Control: Conduct preventive spraying (e.g., 5–10% urea solution or Bordeaux mixture) to destroy overwintering stages of fungal diseases (Funt, 2013).
• Cultivation: Lightly cultivate the soil to break the crust and conserve moisture.

Spring (Growth and Flowering Period)

During this time, active shoot growth begins, leaves unfurl, and buds appear. Raspberries are particularly vulnerable to frost and pests.

Key Tasks:

• Frost Protection: Monitor the weather forecast and use covering material or sprinkling if frost threatens (Crandall, 1994).
• Watering: In the absence of rain, water raspberries, especially during budding and flowering, to ensure good pollination and fruit set.
• Sucker Thinning: Begin removing excess root suckers. Perform the first thinning when suckers reach 5–10 cm in height (Yaroslavtsev, 2003). Repeat as new suckers appear, 2–3 times.
• Pest Control: Monitor and, if necessary, treat for pests (raspberry beetle, raspberry cane fly, gall midge). Follow treatment timing carefully to avoid harming pollinating bees.
• Mulching: Refresh the mulch layer to conserve moisture and suppress weeds (Yaroslavtsev, 2003).

Summer (Flowering, Fruiting)

Summer is the period of active fruiting. The main task is to provide plants with moisture and nutrients for high-quality fruit development and to protect it from birds and diseases.

Key Tasks:

• Watering: Regular and abundant watering during berry swelling and ripening. Watering is especially critical in dry weather when berries are filling. Moisture deficit at this time drastically reduces yield and berry quality (Funt, 2013).
• Fertilization: If no fertilizer was applied in spring, a side dressing with a complete mineral fertilizer (emphasizing potassium and phosphorus) can be done to improve berry flavor and shoot maturation.
• Bird Protection: During berry ripening, cover bushes with protective netting — this is essential, especially for large, sweet-fruited varieties (Buckingham, 2010).
• Removing Spent Canes: Immediately after harvest (or as they mature), cut off all two-year-old fruiting canes at the base. This improves light penetration and air circulation, directing the plant's energy towards growing young canes (Yaroslavtsev, 2003).
• Weed Control: In summer, the primary weed control tool is mulch, as mechanical soil cultivation in the row is prohibited (Crandall, 1994).

Autumn (Preparing for Winter)

In autumn, the plant finishes its vegetation and prepares for winter. The gardener's tasks are to help it transition into dormancy and protect it from the coming frosts.

Key Tasks:

• Removing Remaining Canes: If not done earlier, cut off all spent canes. Also remove all weak, diseased, or unpromising young canes, leaving only the strongest ones (Yaroslavtsev, 2003).
• Fertilizing: Apply phosphorus and potassium fertilizers to increase winter hardiness (20–40 g/m²) (Yaroslavtsev, 2003). Do not apply nitrogen fertilizers in autumn.
• Soil Cultivation: Lightly cultivate the inter-rows and, if necessary, dig the soil in the rows to a depth of no more than 10–15 cm to disturb pest overwintering sites (Yaroslavtsev, 2003).
• Bending Canes: In September–October, before severe frosts arrive, bend the fruiting canes to the ground and secure them. Bend carefully, trying not to break them (Yaroslavtsev, 2003).
• Mulching: If necessary, refresh the mulch layer to protect roots from freezing and accumulate moisture.

Summary: The seasonal care calendar is not a rigid schedule but a flexible action plan adjusted according to weather and plant conditions. The main rule is regular observation and timely execution of key agronomic practices. Remember: every season is important for raspberries, and how you manage autumn and winter preparation determines the quality of the following spring and summer.