Watering

Rapid Growth

Zucchini is a record holder for growth rate among vegetable crops. From sowing to the first harvest, it takes only 40–60 days (Nonnecke, 1989). Such rapid growth requires a continuous supply of water—it is involved in cell division and elongation, nutrient transport, and photosynthesis. Without sufficient moisture, the plant simply cannot build its green mass at the rate encoded in its genetic program.

Large Leaves and Extensive Evaporation Surface

Zucchini develops a powerful leaf apparatus. Its leaf blade is large, with many stomata—this means high transpiration (water evaporation). On a hot day, a single adult plant can lose several liters of water through its leaves (Wehner et al., 2020). If this loss is not replenished, the plant loses turgor, leaves wilt, and the process of photosynthesis slows down.

Formation of New Fruits

Zucchini is a crop with a long fruiting period. For the plant to continuously form new ovaries, it needs a stable water regime. Young fruits are 85–95% water, and if moisture is lacking, the plant drops its ovaries or forms small, deformed fruits (Nonnecke, 1989). Research shows that with water deficiency, the mass formation of fruits sharply decreases, and the harvest loses its marketable quality (Pessarakli, 2016).

Thus, water for zucchini is not just "life support" but a primary resource for every growth stage: from emergence to the harvest of the last fruit. Without regular and sufficient watering, even in fertile soil, zucchini will not reach its yield potential.

Continuing with the next chapter: «2. Water requirements by growth phase». In it, we will analyze how the plant's need for water changes from emergence to mass fruiting.

Seedling emergence and appearance of first leaves

During this period, the main task is to ensure friendly and quick emergence. Zucchini seeds begin to germinate at a soil temperature of 8–10 °C, but the optimum is 25–30 °C (Nonnecke, 1989). For the seeds to swell and start growing, the soil in the top layer (3–5 cm) must be moist. With a lack of water at this time, germination is delayed, seedlings become uneven, and some seeds may not sprout at all.

Practical tip: before sowing, thoroughly water the furrows, and after sowing, lightly roll the soil to improve seed contact with the moist earth. Subsequently, until 2–3 true leaves appear, water moderately, but do not let the top layer dry out—the seedling root system is still weak and superficial.

Bush growth (vegetative stage)

As soon as the zucchini has formed 3–4 true leaves, rapid growth of leaves and stems begins. During this period, the plant lays the foundation for the future harvest—the more powerful the leaf apparatus, the more fruits it can "feed."

Water consumption increases, but excess water at this time is dangerous—it can provoke fungal diseases of the root system and excessive growth of green mass at the expense of future fruiting. The optimal soil moisture for zucchini during this period is about 70–75% of field capacity (Wehner et al., 2020). Watering should be generous but infrequent—enough to wet the soil layer to a depth of 25–30 cm, where the bulk of the roots are located.

Guideline: if the weather is moderately warm (20–25 °C), one good watering per week is sufficient. In hot, dry weather—twice a week.

Flowering and the beginning of fruit set

This is the most critical period in the life of a zucchini. It is during the flowering and initial fruit formation phase that moisture deficiency causes the greatest damage to the harvest (Pessarakli, 2016). Research shows that water stress at this time leads to the dropping of flowers and young ovaries, as well as a reduction in the weight of future fruits.

Soil moisture should be maintained at 75–80% of field capacity. Watering becomes more frequent—about once every 4–5 days in normal weather. It is very important that water reaches the entire root zone evenly, not just the root collar.

During this period, drip irrigation is especially beneficial—it allows you to dose water precisely to the roots, without over-humidifying the air around the flowers and without creating favorable conditions for the development of rot.

Mass fruiting

When several fruits begin to ripen simultaneously on the bush, the zucchini reaches its peak water consumption. Fruits are 95% water, so their growth directly depends on water supply. During this period, the plant requires a continuous supply of moisture—even slight drying of the soil leads to a halt in fruit growth; they become small, coarse, or misshapen (Nonnecke, 1989).

Watering frequency: in hot weather – every 1–2 days; in moderate weather – every 3–4 days. Watering rate – 20–30 liters per 1 m² (about 2–3 buckets per adult plant). The soil should be moist to a depth of at least 30–40 cm.

Important note: 7–10 days before the final harvest (if you plan to harvest all fruits at once), watering is recommended to be stopped—this improves the taste and extends the shelf life of the crop (Kotov & Adriţkaia, 2016).

In the next chapter, we will analyze what the water requirement depends on: how temperature, soil type, the presence of mulch, and plant age influence this. This will help you adjust your watering regime based on the specific conditions of your plot.

Air and soil temperature

The most obvious factor. The higher the temperature, the:

• more intense the evaporation of moisture from the leaf surface (transpiration),
• faster the topsoil dries out,
• higher the growth rate and, consequently, the plant's water consumption.

In hot weather (above 30 °C), zucchini can consume 1.5–2 times more water than at moderate 20–22 °C (Nonnecke, 1989). But there is also a downside: in extreme heat and dry air, stomata may close to reduce water loss, and then growth slows down. Therefore, in hot weather, watering should be not only abundant but also refreshing for the air around the plants.

The temperature of the water itself is also important—cold water (from a well or borehole) can cause root shock in zucchini and stop growth. The optimal temperature for irrigation water is 20–25 °C (Kotov & Adriţkaia, 2016).

Soil type and structure

Soils retain moisture differently, and this determines the frequency and rate of watering.

On sandy soils, without regular watering, zucchini will be constantly stressed, especially during the fruiting period. On clayey soils, the risk of waterlogging is higher, so it is important to monitor drainage and prevent water stagnation (Wehner et al., 2020).

Besides soil type, its structure is important: loose, organic-rich soil absorbs moisture better and retains it longer. Heavy, compacted soils require more frequent surface watering, as water penetrates poorly into the depth.

Precipitation

This is perhaps the most variable factor. In a rainy summer, watering can be minimized or even abandoned altogether. However, in the middle latitudes and southern regions, precipitation often falls unevenly: heavy downpours occur, followed by drought.

You should keep an eye on the weather, but do not completely replace watering with rainfall if it hasn't moistened the soil to a depth of 25–30 cm. It often happens that the top layer is moistened, but the roots remain in a dry zone. Check the wetting depth with a shovel or probe 2–3 hours after rain.

Mulching

Mulch is an "invisible helper" in water conservation. A layer of mulch (mown grass, straw, humus, black film) significantly reduces evaporation from the soil surface (Nonnecke, 1989; Балашев and Земан, 1981). In hot weather, the difference can be 30–40% water savings.

Additionally, mulch:

• protects roots from overheating,
• prevents the formation of a soil crust,
• suppresses weed growth that competes for water.

Practical conclusion: if you have mulched beds, you can water less frequently (by 1–2 days), but the watering rate should be the same so that moisture penetrates deeply.

Plant age and size

The need for water changes as the plant grows. A young zucchini with 3–4 leaves is watered moderately—its roots are still small, and excess moisture can cause rotting. But as soon as active growth of vines and leaves begins, water consumption increases sharply.

The highest water consumption is during the mass fruiting phase, when 3–5 fruits develop simultaneously on the bush and flowering continues (Тараканов and Мухин, 2003). By this time, the root system is capable of extracting moisture from a depth of 30–40 cm, but the main water uptake zone still remains in the upper horizons, so watering must be regular.

How to apply this knowledge in practice?

Keep an observation diary: note the weather, precipitation, soil and plant conditions. Rely not on the calendar but on the appearance of the plants and soil moisture at a depth of 10–15 cm. If the soil at this depth crumbles in your hand—it's time to water. If a lump retains its shape and does not fall apart—there is enough moisture.

In the next chapter, we'll move on to the main point—«4. How to water correctly»: we will analyze frequency, depth, water temperature, and also compare drip irrigation and sprinkling so you can choose the best method for your site.

Watering frequency

Zucchini does not like either drying out or water stagnation. The optimal approach is infrequent but abundant watering, rather than frequent and shallow. Why? Because the zucchini's root system develops deep and wide, and surface wetting does not reach the bulk of the roots, which are at a depth of 20–40 cm (Nonnecke, 1989).

Approximate guidelines by growth phase:

• From emergence to flowering – once every 5–7 days in moderate weather.
• During flowering and fruiting – once every 3–4 days, and in extreme heat—every 1–2 days.

But the main thing is not the schedule, but the soil condition. Check the moisture at a depth of 10–15 cm: if the soil is dry and crumbles in your hand—it's time to water.

Wetting depth

Water should soak the soil to a depth of at least 30–40 cm (Каратаев and Советкина, 1984). Only then do the roots have full access to moisture, and the plant does not depend on every rain.

How to check: 2–3 hours after watering, dig a small hole next to the plant (but without damaging the roots). If moisture has penetrated to 30–40 cm—the rate is sufficient. If only 10–15 cm—increase the amount or duration of watering.

How much to pour under one bush: an adult plant during fruiting needs 10–20 liters of water per watering (depending on soil and weather). Per 1 m², this is about 20–30 liters.

Water temperature

Zucchini is a heat-loving crop, and watering with cold water is a real stress for it. Water from a well, borehole, or central water supply often has a temperature below 15 °C, which can cause:

• shock to the root system and growth arrest,
• weakened immunity and development of root rots,
• dropping of ovaries and flowers (Котов and Адрицкая, 2016).

Rule: use water heated by the sun to a temperature of 20–25 °C. To do this, place a barrel or other container on the site—the water will heat up during the day and can be used for evening watering. If you water from a hose, let the water run for a few minutes to warm up in the pipes under the sun.

Drip irrigation

Drip irrigation is the best choice for zucchini, especially in hot regions and with limited water access. Its advantages:

• Point water supply—moisture goes directly to the root zone, without being wasted on moistening the rows.
• Water savings—up to 40–50% compared to sprinkling and up to 60% compared to furrow irrigation (Wehner et al., 2020).
• Leaves stay dry—this reduces the risk of fungal diseases (powdery mildew, anthracnose, etc.).
• Possibility of combining with fertilizing—fertilizers can be applied through the drip irrigation system (fertigation), delivering nutrition directly to the roots.

Important nuance: with drip irrigation, it is necessary to ensure that the tape or tube is laid along the row of plants, and the emitters are located at a distance of 20–30 cm from the base of the stem. During the fruiting period, drip irrigation should be daily (if the system allows)—2–4 liters per plant per day in hot weather (Пантиелев, 1986).

Sprinkling (overhead watering)

Sprinkling is a classic method often used on large beds. It has its pros and cons.

Pros:

• moistens not only the soil but also the air around the plants, reducing overheating in hot weather,
• washes away dust and some pests from the leaves,
• suitable for large areas.

Cons:

• moisture gets on leaves and flowers, which can provoke fungal diseases,
• water is used less efficiently—some evaporates before reaching the roots,
• in hot weather, sprinkling on a sunny day can cause leaf burns (droplets act as lenses).

Practical recommendations for sprinkling:

• Water early in the morning or in the evening when the sun is not strong.
• If you water in the heat—use a fine spray to reduce evaporation.
• Avoid sprinkling if you see signs of fungal diseases—switch to root watering (Пантиелев, 1986; Каратаев and Советкина, 1984).

Comparison of watering methods

Time of day for watering

The best time to water zucchini is early morning (before 8–9 a.m.) or late evening (after 6–7 p.m.).

• Morning watering—water has time to be absorbed before the heat sets in, leaves dry out during the day, reducing the risk of diseases.
• Evening watering—evaporation is minimal, water is absorbed effectively. But it is important that the leaves have time to dry by night—otherwise, increased night humidity provokes fungal growth.

Avoid watering in the middle of the day, especially in sunny weather—it is a waste of water and extra stress for the plants.

In the next chapter, we'll analyze how exactly the plant reacts to moisture deficiency—by what external signs to understand that the zucchini is suffering from drought, and how this affects the harvest.

External signs of water stress

The first signals appear already when soil moisture drops to 60–65% of field capacity (Nonnecke, 1989). This is the threshold beyond which disruptions begin.

What you will see:

1. Loss of leaf turgor—during the hottest part of the day, leaves become limp and droop. This is a normal reaction to heat, but if they do not recover by evening—it means moisture is critically low.

2. Leaves darken and become dull—the characteristic shine is lost, the blade becomes darker and looks "dry."

3. Leaf edges dry out and curl upward—this is a protective reaction: the plant tries to reduce the evaporation area (Балашев and Земан, 1981).

4. Growth arrest of new leaves and vines—new shoots appear but do not elongate, internodes shorten.

5. Dropping of flowers and small ovaries—this is the most alarming signal. With a lack of water, the plant "sacrifices" the future harvest to preserve the life of the main bush.

With prolonged or severe stress, zucchini may produce bitter fruits. This is due to the accumulation of cucurbitacin—a substance normally found in roots and leaves, but under stress, it moves into the fruits, making them inedible (Nonnecke, 1989).

How yield is reduced

Moisture deficiency affects yield in several ways:

Research confirms: the most sensitive period is flowering and initial fruit growth. If the plant experiences drought at this time, even subsequent abundant watering cannot fully compensate for the loss of yield (Pessarakli, 2016).

How to check if there is enough water

A simple field test—take a handful of soil from a depth of 10–15 cm (from under the bush) and squeeze it in your fist:

• The soil clumps into a lump, does not crumble, leaves a wet mark on the palm—moisture is sufficient.
• The soil rolls into a lump but crumbles with light pressure—moisture is close to the lower limit of optimum, it's time to water.
• The soil crumbles in your hand, does not form a lump—the soil is dry, watering is urgently needed (Каратаев and Советкина, 1984).

You can also look at leaf behavior: if by the morning of the next day after a hot day the leaves have not recovered their turgor—there was not enough moisture, and watering should have been done earlier.

What to do if signs of stress are already visible

1. Water urgently, but gradually. If the soil is very dry, a sudden abundant watering can cause fruit cracking and root shock. It is better to give water in two stages with an interval of 2–3 hours—first 5–7 liters under the bush, then another 10–15 liters.

2. Water at the root, avoiding leaves—they are already weakened, and wet leaves in the heat can get burned.

3. Mulch the soil if you haven't done so before—mulch will sharply reduce evaporation and help retain remaining moisture (Wehner et al., 2020).

4. If possible, shade the plants during extreme heat—for example, with light agrotextile or old sheets on arcs. This will reduce water loss through transpiration by 20–30%.

5. At the next watering (in 2–3 days), combine it with fertilizing with a potassium fertilizer—potassium helps the plant better regulate water exchange and increases resistance to stress (Котов and Адрицкая, 2016).

Important takeaway

Moisture deficit is not just a growth slowdown. It is a cascade of disruptions: from dropping flowers to losing fruit taste. It is much easier to maintain soil moisture at a stable level than to restore the plant after a drought. And here, systematic monitoring and understanding of the signs we've just described come to the rescue.

In the next chapter, we will analyze the opposite situation—«6. Excess moisture». We will learn why overwatering can be even more dangerous than drought, how it affects the roots, and what diseases it provokes.

Oxygen starvation of roots

The zucchini's root system needs access to oxygen for respiration. Water displaces air from soil pores, and the roots begin to suffocate. With prolonged waterlogging (more than 12–24 hours), the following occurs:

• death of root hairs—the main zone of water and nutrient absorption,
• slowing of root respiration—energy metabolism is disrupted,
• accumulation of toxic metabolic products in root tissues (Wehner et al., 2020).

Signs of oxygen starvation: leaves lose turgor, become pale, with a yellowish-green tint, even though the soil is wet. The plant looks "wilted," although there is plenty of water around—a paradox, but the roots simply cannot absorb it.

If you overwatered the zucchini once—it may recover when the soil dries out. If you overwater systematically—the roots begin to rot, and the plant can no longer be restored; you'll have to pull it out and replant (Балашев and Земан, 1981).

Diseases that "love" wet soil

Waterlogging creates ideal conditions for the development of fungal and bacterial infections that affect the root system, the stem base, and fruits.

Fungi and bacteria develop rapidly in conditions of excessive humidity. Spores spread with water splashes during watering or rain—another argument against overhead watering during rainy periods.

Important: diseases caused by excess moisture are difficult to cure. Prevention is much more effective: properly organized watering and drainage.

Decreased root activity and overall growth

Under waterlogging, roots not only suffocate but also stop absorbing nutrients from the soil. Especially affected are:

• Nitrogen—its uptake drops, and green mass growth stops,
• Potassium and phosphorus—their uptake is blocked, leading to weakened flowering and fruit set (Котов and Адрицкая, 2016).

The balance of microelements is disrupted—in wet soil, iron and manganese become unavailable to the plant, chlorosis appears (leaf yellowing). Fruits become watery, lose taste, and do not store well.

External signs of waterlogging

Unlike drought (leaves droop and become gray-green), in excess water, the symptoms look different:

• Leaves become pale, yellowish-green, sometimes with dark spots.
• Lower leaves turn yellow and drop prematurely.
• The stem base darkens and becomes soft, mold may appear.
• Growth of new shoots slows down, the plant "sits in place."
• Fruits are small, watery, and may crack.

If within a few days after rain or watering the leaves do not regain turgor, and the soil is still wet, not just moist—this is an alarm signal.

How to avoid waterlogging

1. Assess the soil before watering. Check moisture at a depth of 10–15 cm. If the soil is wet and water squeezes out when compressed—watering is canceled.

2. Ensure drainage. On heavy clay soils, be sure to make ridges or raised beds—water will drain rather than stagnate. You can add sand or humus to improve structure.

3. Loosen the soil after every heavy rain (as soon as it dries slightly). This restores air access to the roots and accelerates the evaporation of excess moisture (Wehner et al., 2020).

4. Use drip irrigation with dosage—it allows you to precisely control the volume of water and avoid overwatering.

5. If the area is in a lowland and constantly flooded—plant zucchini on raised beds 20–30 cm high. This will protect the roots from prolonged flooding.

What to do during prolonged rains

If prolonged rains have set in and the soil is saturated with moisture:

• Stop all watering until the top layer dries out.
• Loosen the rows to improve aeration.
• Remove lower yellowed leaves—they themselves create increased humidity around the bush.
• At the first signs of fungal diseases, treat the plants (according to instructions) with biofungicides or copper-based preparations (Пантиелев, 1986).

Key takeaway

Optimal watering is not "more" but "exactly as much as needed." Overwatering leads to root dysfunction, diseases, and loss of fruit quality. It is better to under-water than to over-water—with under-watering, the zucchini will recover, but with overwatering, it often dies irreversibly.

In the next chapter, we will analyze «7. How to save water»—practical techniques that allow you to reduce the number of waterings without compromising the harvest. This is especially relevant for regions with limited water access and in hot years.

Mulching—the main tool for saving

Mulch is the most effective and simple way to reduce the number of waterings by 20–40% (Nonnecke, 1989; Wehner et al., 2020). How does it work?

• Reduces evaporation from the soil surface by 1.5–2 times.
• Reduces root overheating—in hot weather, the soil under mulch is 5–8 °C cooler than on an open bed.
• Prevents the formation of soil crust—improves water penetration deep.
• Suppresses weed growth that compete for moisture.

Which materials are suitable:

The mulch layer should be at least 5–8 cm to effectively retain moisture. Mulch the root zone up to a diameter of 50–60 cm (approximately the width of the bush's crown).

Important: do not put a thick layer of mulch right at the stem—leave a gap of 5–7 cm for ventilation to prevent rotting (Балашев and Земан, 1981).

Organic matter—a moisture accumulator in the soil

Sandy soil loses water quickly, clayey soil retains it but often forms a crust. The ideal option is humus-rich, loose soil with a high organic matter content. It:

• absorbs water like a sponge,
• slowly releases it to the roots,
• improves root aeration.

What to do:

1. Annually apply organic fertilizers under zucchini—rotted manure, compost, humus (30–50 kg per 10 m²). This not only feeds the plant but also significantly increases the soil's water-holding capacity (Каратаев and Советкина, 1984).

2. Use green manure (mustard, phacelia, vetch) as a predecessor—they loosen the soil and enrich it with organic matter after incorporation.

3. In heavy clay soils, add sand and humus—water permeability improves, and water does not stagnate.

Drip irrigation—saving up to 50% of water

As discussed in Chapter 4, drip irrigation is the most rational way to supply water to zucchini. Its advantages in terms of saving:

• No losses from evaporation—water goes directly to the roots and is not wasted on wetting empty spaces.
• Reduced consumption by 40–60% compared to sprinkling and up to 70% compared to furrow watering (Wehner et al., 2020).
• Ability to adjust the rate—you know exactly how much water each plant received.

Tip for saving: with drip irrigation, use a soil moisture meter (tensiometer or simple indicator). This will allow you to turn on the system only when the moisture drops to a certain level and not waste water "just in case" (Пантиелев, 1986).

Rainwater harvesting

Rainwater—soft, warm, ideal for zucchini. A collection system can be simple and effective:

• Install rainwater barrels under the slopes of greenhouse roofs, sheds, or residential buildings.
• Use large containers (IBC totes) to collect water from the roofs of large greenhouses—from 100 m² of roof, one good downpour can collect up to 5–6 m³ of water.
• Organize overflow between containers and use the water for watering during dry periods.

This is free water that you will use at the most needed moment.

Smart watering techniques

Furrow watering (into grooves between beds)—a more economical option than sprinkling. Water slowly seeps into the root zone and evaporates less. However, it requires careful leveling of the beds and is not suitable for loose sandy soils.

Proper watering depth—another way to save. If you water superficially (to 5–10 cm), water evaporates quickly, and the roots remain dry. If you water infrequently but abundantly (to 30–40 cm), moisture stays in the deep layers, and the surface remains drier, which reduces evaporation losses and inhibits weed growth (Nonnecke, 1989).

Watering time—also a saving measure

Evening watering is more effective than morning watering in terms of water saving: evaporation is minimal, and almost all the water reaches the roots. But it is important that the leaves dry by night—otherwise, the risk of fungal diseases increases.

Morning watering—if you can water early in the morning (before 8:00 a.m.), when there is no heat yet, evaporation is also low. Choose the time that is convenient for you—the main thing is that watering does not fall in the middle of a sunny day, when up to 30% of water simply evaporates without reaching the roots (Котов and Адрицкая, 2016).

Moisture control—a precise weapon

Instead of watering "by eye," learn to determine whether water is really needed.

• Simple method: take a handful of soil from a depth of 10–15 cm and squeeze it in your fist. If the soil crumbles—it's time to water. If it holds its shape—there is enough moisture.
• Moisture meter—an inexpensive device that measures soil moisture and helps to turn on watering only when necessary.

This will eliminate unnecessary waterings and save water and your time.

Comparison of water saving methods

The main principle of saving

"Water not more often, but smarter." Instead of increasing the frequency of watering—increase the soil's ability to retain moisture and reduce its losses. Then you can maintain optimal moisture levels with less water consumption, and the zucchini will reward you with stable and abundant fruiting even in dry years.

In the final chapter, we will analyze «8. Typical mistakes when watering»—what most often goes wrong, and how to avoid the most common traps that can ruin all your work.

❌ Mistake 1. Watering with cold water directly from a well or borehole

Why it's wrong: Zucchini is a heat-loving plant. Water with a temperature below 15 °C causes root stress, slows growth, and provokes root rot. A cold "shower" for zucchini is like an ice bath for a human.

How to fix: Install a barrel or other container on the site to settle and heat the water. The sun will heat it to the optimal 20–25 °C during the day. If you use a hose from the water supply—let the water run for a few minutes to warm up in the pipes, or at least direct the stream to the ground next to the bush, not directly under the root (Nonnecke, 1989).

❌ Mistake 2. Watering often, but superficially (to 3–5 cm)

Why it's wrong: Zucchini roots are located at a depth of 20–40 cm, and surface wetting does not reach the bulk of them. The plant is forced to develop roots in the top layer, where moisture evaporates quickly, and at the slightest drought, it finds itself without water.

How to fix: Water infrequently but abundantly, so that water penetrates to a depth of 30–40 cm. Guideline—20–30 liters per 1 m² per watering (2–3 buckets per adult bush). Check the wetting depth 2–3 hours after watering (Каратаев and Советкина, 1984).

❌ Mistake 3. Watering too often (every day)

Why it's wrong: Constant moisture in the top layer without drying creates ideal conditions for the development of fungal diseases: root rot, powdery mildew, bacteriosis. In addition, frequent watering leaches nutrients from the root zone and increases water consumption.

How to fix: Allow the soil to dry between waterings. Check moisture at a depth of 10–15 cm: if the soil crumbles in your hand—it's time to water. If it clumps—wait (Wehner et al., 2020).

❌ Mistake 4. Overhead watering on a sunny day (sprinkling in the daytime)

Why it's wrong: Water drops on leaves in the heat act like lenses, focusing sunlight. This causes burns—brown spots appear, leaves turn yellow. In addition, water on leaves and flowers in the heat evaporates sharply, creating a greenhouse effect.

How to fix: Water at the root, avoiding getting on the leaves. If you use sprinkling—do it early in the morning (before 8–9 a.m.) or in the evening (after 6–7 p.m.), when the sun is not strong (Пантиелев, 1986).

❌ Mistake 5. Watering directly at the stem (in the center of the bush)

Why it's wrong: The zucchini stem at the base is the most vulnerable part. Constant water in this zone leads to rotting of the root collar, the development of stem rot, and plant death.

How to fix: Water not right under the stem, but around the perimeter of the root zone, at a distance of 20–30 cm from the trunk. Moisture will reach the lateral roots, which are the main consumers of water (Котов and Адрицкая, 2016).

❌ Mistake 6. Ignoring mulch

Why it's wrong: Without mulch, the soil overheats and quickly loses moisture through evaporation. You have to water 1.5–2 times more often, and water literally goes "nowhere."

How to fix: Mulch the bed with a layer of 5–8 cm (straw, grass, humus, black film). This will retain moisture, reduce the number of waterings, and protect the roots from overheating. The effect is noticeable within 2–3 days (Nonnecke, 1989).

❌ Mistake 7. Watering in rainy weather "out of habit"

Why it's wrong: Many continue to water according to schedule even when it's raining. This leads to waterlogging, oxygen starvation of the roots, and disease development.

How to fix: Rely on the condition of the soil, not the calendar. After rain, check the moisture at a depth of 10–15 cm. If the soil is wet—watering is canceled. Rain does not always soak deeply, but often sufficiently moistens the top layer (Wehner et al., 2020).

❌ Mistake 8. Forgetting about watering during the fruit formation period

Why it's wrong: Zucchini builds its fruits primarily from water. During mass fruiting, the need for moisture is maximum. If you regularly under-water at this time, the fruits stop growing, become small, hard, lose taste, and sometimes ovaries drop (Pessarakli, 2016).

How to fix: During the active fruiting phase, water regularly—every 2–4 days depending on the weather, not allowing the soil to dry out at a depth of 30 cm. This is the most critical period, where "the miser pays twice."

❌ Mistake 9. Watering immediately after a severe drought

Why it's wrong: If the soil has dried out severely and cracked, a sudden abundant watering causes a sharp expansion of tissues, leading to fruit cracking. Zucchini can "burst" literally within a day.

How to fix: If the soil is severely dry, give water in two stages with an interval of 3–4 hours: first 5–7 liters under the bush (to moisten the top layer), then another 10–15 liters (for deep wetting). This approach minimizes stress and prevents fruit damage (Балашев and Земан, 1981).

Checklist: are you doing everything right?

If there are more than two "No" answers—it's time to adjust your approach. Zucchini will surely reward you with improved yields.

The main things to remember about watering zucchini

1. Water infrequently but abundantly—water must reach the roots at a depth of 30–40 cm.

2. Don't use cold water—heat it to soil temperature.

3. Don't flood the stem—water around the perimeter of the bush.

4. The fruiting period is critical—don't miss waterings.

5. Mulch is the best helper—reduces the number of waterings by 30–40%.

6. The golden rule: always check soil moisture before watering—if the top layer (10–15 cm) is still wet, watering can wait.

These simple principles will help you grow a healthy, abundantly fruiting zucchini even in difficult weather conditions.