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Harvesting and storage

Last updated: July 11, 2026 Русский Español

1. How the Pumpkin Fruit Matures

To correctly determine the harvest time, it's important to understand what happens to the fruit during its growth and maturation period. A fully grown fruit is not always a fully mature one. In pumpkins, as with many other crops, there are two main developmental stages that matter to the gardener.

Fruit Development Stages

Growth phase. During the first 30–60 days after pollination (depending on the variety and species), the fruit actively increases in size. During this time, cells divide and expand, water accumulates, and intensive synthesis of organic compounds occurs. The rind during this period is still thin and easily damaged, the flesh contains a lot of water and few sugars. Fruit growth continues until it reaches its genetically predetermined size. At the end of this phase, the fruit stops increasing in volume (Wehner et al., 2020).

Ripening (maturation) phase. After the fruit has stopped growing, a crucial stage begins that determines its flavor, nutritional value, and storage ability. During this period, the following processes occur:

1. Accumulation of dry matter and sugars. In the flesh of the pumpkin, the outflow of nutrients from the leaves continues. In fruits of the large-fruited pumpkin (Cucurbita maxima), starch accumulation actively continues right up to harvest, and during storage it hydrolyzes into sugars, improving the flavor (Wehner et al., 2020; Kotov and Adritskaya, 2016). The content of dry matter and beta-carotene can even increase during storage (Wehner et al., 2020).

2. Formation of a strong rind. The pumpkin skin becomes hard, rough, and resistant to fingernail pressure. This is a natural protective layer that prevents moisture loss and pathogen entry. In hard-skinned pumpkin species (C. pepo), the rind is particularly dense, while in large-fruited and butternut types it is relatively softer but still sufficiently strong for long-term storage (Lebedeva, 1987; Kotov and Adritskaya, 2016). Lignification and suberization of rind cells significantly reduce water evaporation and increase resistance to mechanical damage (Wehner et al., 2020).

3. Seed maturation. The seeds inside the fruit reach physiological maturity. They become hard, fully formed, and acquire the color characteristic of the variety. This trait is closely linked to full fruit maturity.

4. Reduction in water content. During ripening, the fruit loses some moisture, increasing the concentration of sugars and dry matter. This not only improves flavor but also increases resistance to rot during storage.

5. Cessation of fruit growth. As mentioned, the fruit stops increasing in size 2–4 weeks before reaching full maturity. Thus, a large fruit may still be immature, while a small one may be fully ready for harvest and storage (Pessarakli, 2016; Wehner et al., 2020).

Important: The ripening process can continue after harvest, especially for some varieties. This property is called the ability to after-ripen. Therefore, harvesting pumpkins at the stage of "full technical maturity" is not always mandatory – fruits picked slightly earlier can ripen during proper storage.

2. How to Determine Ripeness

Determining pumpkin ripeness is a skill that comes with experience, but there are clear objective signs that allow you to accurately tell when a fruit is ready for harvest. It's important to evaluate them as a whole, rather than relying on just one indicator.

Main Signs of Ripeness

1. Change in Rind Color and Pattern

In most varieties, the skin color changes as it ripens: the green hue shifts to yellow, orange, cream, or gray, characteristic of the variety. The pattern on the rind (stripes, spots, netting) becomes clearer and more contrasting. For example, in the variety 'Volzhskaya Gray 92', the fruits acquire a characteristic gray color, while in butternut pumpkins they take on a cream or brownish tint (Wehner et al., 2020; Lebedeva, 1987). However, some varieties, especially hybrids with dark green skin, may not change color, so this sign is not universal.

2. Hardness and Density of the Rind

This is one of the most reliable signs. The rind of a ripe pumpkin becomes so hard that it cannot be pierced with a fingernail or easily damaged. When tapping the fruit, a dull, solid sound is heard, unlike the ringing sound of an unripe fruit. The hard rind serves as a natural protection against moisture loss and diseases during storage (Wehner et al., 2020; Pessarakli, 2016). In species C. maxima (large-fruited) and C. moschata (butternut), the rind is generally softer than in C. pepo, but still becomes sufficiently dense by full maturity.

3. Drying and Corking of the Peduncle

In most pumpkin varieties, by the time of ripening, the peduncle begins to dry out, becomes hard, woody, and easily separates from the vine. In some species, especially butternut pumpkins, the peduncle may be thickened and not completely dry, but its color changes from green to grayish or brown. The peduncle of a ripe pumpkin acts as a "cork" that blocks the entry of microorganisms to the fruit (Wehner et al., 2020; Rana, 2018).

4. Drying and Dying of the Vine

In most pumpkins, especially large-fruited and hard-skinned types, by the time fruits mature, the vines begin to yellow, dry out, and die off. If you see that the leaves and stems have turned brown and dried up, it's a sure sign that the fruits have stopped receiving nutrition from the plant and have completed their development. However, in some varieties (especially butternut types), the vines may remain green even when fruits are ripe, so this sign is not absolute (Lebedeva, 1987).

5. Time After Fruit Set

Each variety has its own growing season – the time from emergence to full maturity. This information is indicated on the seed packet. However, timing greatly depends on weather conditions, temperature, and humidity. In cold and rainy summers, ripening may be delayed, while in hot weather it may accelerate. Therefore, you shouldn't rely only on the calendar – it's merely a secondary guide. For example, in large-fruited pumpkins, 115–130 days may pass from emergence to maturity, while in hard-skinned types it's 80–110 (Kotov and Adritskaya, 2016).

6. Additional Signs for Individual Species

Hard-skinned pumpkin (Cucurbita pepo) – by maturity, its rind becomes very hard, and the peduncle becomes rigid and ribbed.
Large-fruited pumpkin (C. maxima) – the peduncle is cylindrical, fleshy, without ribs, but also dries out. Seeds are large and smooth.
Butternut pumpkin (C. moschata) – the peduncle widens at the fruit, has a faceted shape, and the rind may be softer. Ripeness is often determined by skin color – it becomes cream or brown (Kotov and Adritskaya, 2016).

3. When to Harvest

Choosing the right time for pumpkin harvest is a balance between allowing the fruits to fully ripen and the risk of losing the crop due to unfavorable weather conditions. You should rely not on calendar dates but on physiological maturity and weather conditions.

Main Guidelines for Starting Harvest

Signs of ripeness. As we discussed in the previous chapter, harvesting should begin when the majority of fruits show signs of full maturity: hard rind, drying peduncle, color characteristic of the variety, and drying vines (Wehner et al., 2020). If you see that the plants are beginning to yellow and die off – this is a signal that the fruits are ready for harvest.

Impact of early frosts. Pumpkin is a heat-loving crop. It absolutely cannot tolerate frost. Even slight freezing (temperatures below -1…-2 °C) can damage the rind, and such fruits will store poorly, as rot quickly develops at the damaged spots (Wehner et al., 2020; Lebedeva, 1987). Therefore, the entire crop must be harvested before sustained autumn frosts set in. This is the main rule.

If frost is forecast and some fruits are not yet ripe, it's better to harvest them earlier than to lose the entire crop. Unripe pumpkins may ripen during storage (after-ripening process), but frost-damaged ones will not.

Impact of rainy weather. Prolonged rains before harvest can negatively affect storage ability. First, high soil moisture promotes the development of fungal diseases (e.g., powdery mildew and rots) on vines and fruits. Second, fruits lying on wet ground may begin to rot on the side in contact with the soil (Wehner et al., 2020; Pessarakli, 2016). If a prolonged rainy period is forecast, it's better to harvest before it begins, even if the fruits have not reached ideal ripeness.

Regional climatic features. In regions with warm and long autumns (southern latitudes), pumpkins can remain in the fields until late autumn, gradually ripening and accumulating sugars. In regions with short and cool summers (northern latitudes), harvesting is often done earlier out of necessity, without waiting for full ripeness, to save the crop from frost. In such conditions, after-ripening is especially important.

Differences between pumpkin species in harvest timing:

Hard-skinned pumpkins (Cucurbita pepo): This group includes zucchini, pattypan squash, as well as most decorative and table pumpkins with hard rinds. They ripen faster and are usually harvested earlier than large-fruited types.
Large-fruited pumpkins (C. maxima): Have a longer growing season (115–130 days). They are harvested later, in late September – October, when fruits reach maximum size and vines begin to dry (Kotov and Adritskaya, 2016). Varieties in this group store well and after-ripen. Examples: 'Volzhskaya Gray 92', 'Table Winter A-5'.
Butternut pumpkins (C. moschata): The latest and most heat-loving. They often only fully ripen in southern regions. Their fruits have thin rinds and require particularly careful handling. Harvesting is done before frost, but they can after-ripen during storage for up to 1–2 months (Kotov and Adritskaya, 2016). Examples: 'Vitamin', 'Prikubanskaya'.

Conclusion: The optimal time for pumpkin harvest arrives when the majority of fruits have reached physiological maturity (by signs), the weather is dry and sunny, and nighttime temperatures do not drop below freezing. If there is a threat of frost, harvesting is done immediately, regardless of the stage of ripeness. It's advisable to choose a dry, clear day so that the fruits are not wet – moisture on the rind promotes the development of rot during storage.

4. How to Properly Harvest the Fruits

Proper harvesting is not just about picking fruits from the garden bed. The duration of storage directly depends on how carefully you perform this operation. Pumpkins are easily damaged, and even a small scratch or abrasion can become an entry point for rot-causing bacteria and fungi (Wehner et al., 2020; Pessarakli, 2016).

Main Harvesting Rules

1. Use Pruners or a Knife

Never pull or twist a pumpkin off the vine! This almost always leads to tearing the peduncle at the base, disrupting the natural "lock" – the abscission zone through which microorganisms cannot pass. Pulling often damages the upper part of the fruit, and such a fruit will not store long (Wehner et al., 2020).

Cut the fruit with sharp pruners or a knife, leaving a peduncle at least 3–5 cm long. The longer the peduncle (within reasonable limits), the lower the risk of infection. However, an excessively long peduncle may damage neighboring fruits during storage, so the optimal length is 4–6 cm (Wehner et al., 2020; Pessarakli, 2016). The cut should be clean, without frayed edges.

2. Proper Handling of Heavy Fruits

Large pumpkins can weigh 10–20 kg or more. They should be carried by supporting them from below with both hands, as if handling precious cargo. The following are strictly prohibited:

Holding the pumpkin by the peduncle – it may break off, causing the fruit to fall and break.
Rolling the pumpkin along the ground – this may damage the rind and cause microcracks.
Throwing pumpkins against each other or on the ground. Every fall, even from a small height, causes internal damage (bruising) to the flesh, which may not be visible externally but will lead to rapid rotting.
Stacking heavy pumpkins in multiple layers. Lower fruits may crack or deform under the weight of those above, especially if not fully ripe (Pessarakli, 2016).

3. Sorting Immediately After Harvest

Immediately after harvesting, conduct primary sorting. This will save time and space in storage. Divide the fruits into three groups:

For long-term storage: fully ripe, with hard rinds, without a single spot or damage. Peduncle dry and intact.
For short-term use (within 1–2 weeks): fruits with small scratches, unripe (can be used for processing or animal feed), cracked from impacts.
For processing (juice, porridge, candied fruits): frost-damaged, broken, with signs of rot or disease.

Damaged fruits should not be hoped to be saved – they will rot and spoil the neighboring ones.

4. Cleaning from Soil

If pumpkins have been lying on wet ground, there may be clods of dirt on their surface. They should be carefully removed, for example, with a dry cloth. But never wash pumpkins before storing them! Water can penetrate into microcracks, causing rot. Dirt can be brushed off with a dry brush or simply allowed to dry and then shaken off (Wehner et al., 2020; Pessarakli, 2016).

5. Field Drying (if weather permits)

In dry and warm weather after harvest, you can leave the fruits in the field or in a ventilated place for 2–3 days. During this time, their surface will dry well, and minor scratches (if any) will heal (suberization), increasing storage ability. However, if rain or frost is possible, it's better to move the fruits under cover immediately (Wehner et al., 2020).

5. After-Ripening

After-ripening is the process by which fruits harvested before full physiological maturity continue to ripen in storage. This is not "ripening" in the sense of growth, but biochemical changes that improve the flavor, texture, and nutritional value of the fruit. Understanding this process will help you properly use a not-fully-ripe crop and get the most out of each fruit.

When After-Ripening is Necessary

After-ripening is required in the following cases:

Harvesting due to threat of frost. If you are forced to harvest early due to the arrival of cold weather, the fruits almost always have after-ripening potential (Wehner et al., 2020). The main thing is that the fruits have reached at least the stage of technical maturity (stopped growing, begun to change color, but the rind has not yet fully hardened).
Unripe fruits. If there are fruits left on the vine that did not have time to ripen by autumn, they can be picked and sent for after-ripening. They will not store as long as fully ripe ones, but their flavor and quality will improve significantly.
Varieties with a long after-ripening period. Some varieties of large-fruited and butternut pumpkins reach their maximum flavor quality only several weeks or months after harvest. For example, in large-fruited pumpkins, the starch accumulated in the fruits gradually hydrolyzes into sugars, making the flesh sweeter and more aromatic (Kotov and Adritskaya, 2016).

How After-Ripening Occurs

The after-ripening process is a continuation of the biochemical reactions that began in the plant, but now they proceed using the fruit's own resources. In the pumpkin, the following processes continue:

1. Conversion of starch to sugars. This is especially characteristic of large-fruited pumpkins (C. maxima) and some butternut types. During storage, the sugar content increases, and the flesh becomes sweeter and juicier (Wehner et al., 2020; Kotov and Adritskaya, 2016).

2. Change in flesh color. In some varieties, the orange color of the flesh becomes more intense due to an increase in beta-carotene and other pigments.

3. Seed maturation. Even after harvest, the seeds inside the fruit may continue to mature if stored at a sufficiently warm temperature. However, this is not the goal for table pumpkins.

4. Reduction in moisture. Gradual evaporation of moisture through the peduncle and rind leads to an increase in the concentration of dry matter, which improves flavor and densifies the flesh.

Conditions for Successful After-Ripening

To make after-ripening effective, certain conditions must be created:

Temperature. The optimal temperature for after-ripening is from +20 °C to +27 °C, with relative humidity around 80–85% (Wehner et al., 2020; Pessarakli, 2016). Under such conditions, fruits ripen faster and better. If the temperature drops below +15 °C, the process slows down, and at +10 °C and below it may stop.
Humidity. High humidity (70–80%) is necessary so that fruits do not lose too much moisture, otherwise they may wilt. However, it's important to ensure good ventilation to avoid mold formation.
Time. The after-ripening period depends on the degree of fruit maturity at harvest and temperature. On average, it takes 1 to 4 weeks. Unripe fruits may after-ripen for up to 2 months in warm conditions.

Which Varieties After-Ripen Particularly Well

The ability to after-ripen greatly depends on the species and variety:

Large-fruited pumpkins (C. maxima) after-ripen best. The conversion of starch to sugars is active during the first 1–2 months of storage. Varieties like 'Table Winter A-5', 'Volzhskaya Gray 92' acquire their true sweetness precisely during after-ripening (Kotov and Adritskaya, 2016).
Butternut pumpkins (C. moschata) after-ripen well. They are heat-loving and often do not have time to fully ripen in cool climates. In warm storage, they can ripen and accumulate sugars for 1–2 months. Additionally, their flesh becomes more oily.
Hard-skinned pumpkins (C. pepo) after-ripen less well; their flavor and storage ability depend more on ripeness at harvest. However, they can also improve slightly in flavor when stored in warmth (Wehner et al., 2020).

Important: if you notice a fruit starting to rot, or spots appearing on it, immediately remove it from the after-ripening area to prevent infection from spreading to healthy fruits. Regularly check the crop.

Practical Tip

After harvest, if the weather is dry and warm, you can leave the pumpkins in the sun for 2–3 days – this will both dry them and kickstart the after-ripening process. If it's cold or damp, immediately place them in a warm room (e.g., a shed or room) with a temperature around +25 °C and ensure ventilation. After 2–4 weeks, when the fruits become firmer and more aromatic, they can be moved to a cooler place for long-term storage.

6. Storage Conditions

Properly organized storage is the key to having your pumpkins delight you with fresh flavor until spring. Pumpkins belong to the group of vegetables that, under certain conditions, can be stored for several months, and some species – even until the next harvest (Wehner et al., 2020).

Main Storage Parameters

1. Temperature

This is the main factor affecting storage duration. Pumpkins are a heat-loving crop and need a specific temperature regime during storage. The optimal range for most winter varieties is from +10 °C to +15 °C. At lower temperatures (below +10 °C), pumpkins may develop a physiological disorder – "chilling injury." This manifests as sunken spots on the rind, softening of the flesh, loss of flavor, and rapid spoilage (Wehner et al., 2020; Nonnecke, 1989).

For hard-skinned and large-fruited pumpkins (C. pepo, C. maxima): optimal temperature is +10…+13 °C.
For butternut pumpkins (C. moschata): they are more heat-loving, so the storage temperature can be slightly higher – +13…+15 °C (Pessarakli, 2016; Kotov and Adritskaya, 2016).

At temperatures above +15 °C, pumpkins begin to respire more intensively, leading to moisture loss, wilting, and weight reduction. Also, microorganisms develop more actively in warm storage. Therefore, it's important to find a cool but not cold place.

2. Air Humidity

There is some contradiction here: for some species, low humidity is important, for others – moderate. However, for most table pumpkins, it is recommended to maintain relative air humidity within 50–70%. At higher humidity (above 80%), the risk of mold and bacterial rots increases. At too low humidity (less than 40–50%), fruits begin to dry out, lose turgor, and shrivel (Nonnecke, 1989; Wehner et al., 2020).

For large-fruited pumpkins (e.g., 'Hubbard'), humidity of 70–75% is recommended (Nonnecke, 1989).
For butternut pumpkins – lower, around 50–60% (Pessarakli, 2016).
For hard-skinned – 50–70% (Wehner et al., 2020).

The optimal balance: humidity should not be too high (otherwise rot) but also not too low (otherwise drying out). Good ventilation helps regulate this parameter.

3. Ventilation

Fresh air and its circulation are essential for successful storage. Pumpkins release carbon dioxide and moisture during respiration. If air stagnates, humidity increases, creating conditions for mold and disease development.

Ensure natural supply and exhaust ventilation in the storage area.
Do not store pumpkins in tightly closed plastic bags or boxes without ventilation.
It's best to use shelves, wooden slatted crates, or simply spread the fruits on dry straw or shavings on the floor, but with gaps for air circulation (Pessarakli, 2016).

4. Lighting

Pumpkins, like most vegetables, do not need light during storage. Moreover, excess light can cause greening of the rind (if not fully ripe) and stimulate germination processes. Therefore, store pumpkins in a dark place – a cellar, basement, or dark pantry.

5. Arrangement of Fruits

Proper arrangement is the art of not damaging pumpkins against each other.

In a single layer. Large pumpkins are best laid out on shelves or the floor in a single layer, so that they do not touch each other. This prevents the spread of rot from one fruit to a neighbor and ensures good air circulation.
Peduncle up. This position allows moisture to evaporate from the peduncle rather than the flesh, slowing the development of rot at the base.
On a bedding. The bottom of the shelf or floor can be covered with dry straw, shavings, sawdust, or paper – this absorbs excess moisture and protects fruits from dampness.
No pressure. Do not place heavy boxes with other vegetables on top of pumpkins – this will cause deformation and dents, which will become centers of rot.

7. What Factors Affect Storage Ability

Storage ability (the ability of fruits to maintain their consumer qualities for a long time) is not a random or genetically predetermined value. It is the result of the interaction of many factors at all stages of cultivation and harvest. Understanding these factors will help you avoid many problems and extend the consumption period of your harvest.

1. Varietal Characteristics

This is the most important factor, genetically determined. Different species and varieties of pumpkins have different storage abilities (Wehner et al., 2020; Nonnecke, 1989).

Large-fruited pumpkins (Cucurbita maxima): Overall, they are the most storable. Varieties such as 'Hubbard', 'Sweet Meat' can be stored for up to 6–11 months. However, different varieties within this group vary: for example, 'Turban' stores for about 3 months, while 'Hubbard' – up to 6 (Wehner et al., 2020).
Butternut pumpkins (C. moschata): Have good storage ability, especially after 1–2 months of storage, when their flavor becomes richer. Varieties like 'Butternut' can be stored for up to 5 months (Wehner et al., 2020).
Hard-skinned pumpkins (C. pepo): This group includes small-fruited varieties, often used as ornamentals. Their storage ability is generally lower – they store for 2–4 months (e.g., acorn squash) (Nonnecke, 1989; Wehner et al., 2020).

Practical conclusion: If you want to store pumpkins until spring, choose large-fruited or butternut pumpkin varieties with long storage life. Information on storage ability is usually indicated on seed packets.

2. Degree of Ripeness at Harvest

This factor is inseparable from the previous ones. As we discussed in Chapter 2, full ripeness is characterized by the formation of a dense rind and a woody peduncle. These structures protect the fruit from pathogen entry and moisture loss.

Unripe fruits have a thin, easily damaged skin. During storage, they quickly lose turgor, shrivel, and become easy prey for rot bacteria (Wehner et al., 2020; Pessarakli, 2016).
Overripe fruits also store less well – their flesh may become loose, and the rind may crack.

Practical conclusion: Fruits that have reached full physiological maturity (by all signs from Chapter 2) store best. After-ripening of slightly earlier-picked fruits is possible, but their storage ability will be lower.

3. Mineral Nutrition Conditions

Plant nutrition during the growing season directly affects fruit quality and storage ability. Excess or deficiency of elements affects tissue density.

Nitrogen (N): Excess nitrogen fertilizers (especially during fruit formation) stimulates excessive vegetative growth and reduces fruit quality. The flesh becomes more watery, the rind thinner and weaker. This directly reduces storage ability (Wehner et al., 2020; Mondal et al., 2020).
Potassium (K): Adequate potassium nutrition, conversely, promotes the formation of a dense rind, improves flavor, and increases disease resistance. Applying potassium in the second half of the growing season increases storage ability (Wehner et al., 2020).
Phosphorus (P): Phosphorus participates in metabolism, promotes better tissue maturation, and consequently increases fruit storage ability (Mondal et al., 2020).

Practical conclusion: To obtain storable pumpkins, avoid high doses of nitrogen fertilizers after the start of fruiting. Pay attention to potassium-phosphorus fertilizers.

4. Weather Conditions During the Growing Season

Growing conditions can either promote good storage ability or negatively affect it (Mondal et al., 2020; Pessarakli, 2016).

Sunny and warm weather: Sunny days promote active photosynthesis, accumulation of sugars and dry matter, as well as fruit ripening. Such pumpkins store better.
Rainy and cool weather: Excess moisture during ripening reduces dry matter content, makes the flesh more watery, and increases the risk of fungal diseases that infect fruits while still in the field.
Temperature fluctuations (frost): As mentioned, even light frosts damage the rind and make fruits unsuitable for long-term storage (Wehner et al., 2020).

5. Mechanical Damage

This is one of the strongest negative factors. Every scratch, dent, crack is an open door for infection. During harvest and transport, pumpkins are easily damaged.

Even microcracks invisible to the eye on the rind can cause moisture loss.
Deep abrasions and punctures are quickly colonized by rot microorganisms that infect the flesh and render the fruit unusable (Wehner et al., 2020; Pessarakli, 2016).
Impacts from falls, strong compression during carrying, or improper stacking also lead to bruises, which over time manifest as darkening of the flesh.

6. Diseases

Pumpkins can be affected by various diseases, many of which manifest during storage. Infection can get onto the fruits while still in the field and develop during storage. Some of the most common pathogens:

Fungi of the genus Fusarium (Fusarium spp.) – cause fruit rots, especially at high humidity (Mondal et al., 2020).
Fungi of the genera Rhizopus, Aspergillus and others – cause soft rots.
Bacterial rot – also develops when rind integrity is compromised.

Practical conclusion: Timely harvesting in dry weather, disease prevention in the field (spraying, removal of diseased plants, crop rotation), and especially – protecting fruits from damage are key to preventing diseases during storage. Carefully inspect fruits before storage – questionable ones should not be sent to the common storage area.

8. Typical Mistakes

Long-term experience of gardeners shows that most problems with pumpkin storage arise from several recurring mistakes. Knowing them will help you avoid disappointment and preserve your harvest until spring.

Mistake 1. Too Early Harvest

What it is: Harvesting fruits that have not yet reached full maturity – when the rind is soft, easily scratched by a fingernail, and the peduncle is juicy and green.

Consequences: Such fruits have a thin, not fully formed protective rind. They quickly lose moisture, shrivel, and become limp. Additionally, their resistance to diseases is reduced – pathogens penetrate more easily through the thin skin. Unripe pumpkins store significantly worse than fully ripe ones (Wehner et al., 2020; Pessarakli, 2016). Often they do not ripen to the desired condition even during storage.

How to avoid: Wait for all signs of ripeness to appear (Chapter 2). Rely on hard rind, drying peduncle, and color characteristic of the variety.

Mistake 2. Harvest After Frosts

What it is: Leaving pumpkins in the field until the first autumn frosts and harvesting already frozen fruits.

Consequences: Even light freezing (temperatures below 0 °C) damages fruit tissues. Sunken spots may appear on the surface, and softened areas inside. These damages are an excellent environment for rot microorganisms. Such fruits do not store – they spoil within a few weeks (Wehner et al., 2020; Nonnecke, 1989).

How to avoid: Monitor the weather forecast. Harvest the entire crop before sustained frosts set in. If frost occurs unexpectedly and fruits are still in the field, try to cut them immediately and let them warm up at room temperature – but their storage ability will already be reduced.

Mistake 3. No Peduncle When Cutting

What it is: Pulling or twisting the pumpkin off, or cutting it "at the root," without leaving part of the peduncle.

Consequences: The pumpkin has no natural "lock" – an abscission zone that would heal by itself, as in watermelons or melons. When pulled or cut at the very base, an open wound is created through which bacteria and fungi easily enter, causing rot (Wehner et al., 2020; Pessarakli, 2016). The fruit may begin to rot from the top.

How to avoid: Always cut the pumpkin with sharp pruners, leaving a peduncle at least 3–5 cm long. This creates a natural barrier to infection.

Mistake 4. Storage in a Damp Room or on a Concrete Floor

What it is: Putting pumpkins in a cellar or basement with high humidity, where it's damp and air stagnates. Or storing fruits directly on a concrete or dirty floor.

Consequences: High humidity (above 70–80%) and poor ventilation promote the development of mold and rot. Additionally, a concrete floor cools and creates condensation, which also provokes rot. Pumpkins lying on a wet surface are quickly affected by fungal diseases (Wehner et al., 2020; Mondal et al., 2020).

How to avoid: Ensure good ventilation in the storage area and maintain humidity within 50–70%. Place fruits on a dry bedding (straw, shavings, wooden grids, or shelves). Do not store pumpkins on a concrete floor – put boards or plywood underneath.

Mistake 5. Rind Damage (Scratches, Dents)

What it is: Careless handling during harvesting and transport: rolling on the ground, throwing, stacking in multiple layers, contact with sharp objects.

Consequences: Any damage to the rind – scratch, dent, crack – becomes an "entry point" for infection. Even microcracks lead to moisture loss and subsequent rotting. Often damage does not appear immediately but after several weeks of storage (Pessarakli, 2016; Wehner et al., 2020).

How to avoid: Handle pumpkins as carefully as possible. Do not hold them by the peduncle, do not throw or roll them. Stack only in a single layer on soft bedding. During harvesting, do not allow fruits to bump against each other.

Mistake 6. Storing Wet Fruits

What it is: Harvesting in rainy weather or immediately after rain, storing wet pumpkins.

Consequences: Drops of water on the fruit surface create an ideal environment for the development of mold and bacterial rots. Moisture penetrates microcracks and accelerates decomposition processes.

How to avoid: Harvest only on a dry, sunny day. If you were forced to harvest wet fruits (in case of frost threat), be sure to let them dry in a dry, ventilated room for several days before storage (Wehner et al., 2020).

Summary

Proper pumpkin harvesting and storage is a step-by-step process where each stage is important for the final result.

1. Let the fruits ripen: wait for a hard rind, drying peduncle, and characteristic color. Do not cut too early.

2. Harvest before frost: monitor the forecast to prevent fruits from freezing.

3. Cut carefully: leave a 3–5 cm peduncle, do not pull or twist.

4. Sort: separate healthy fruits from damaged ones. Store only flawless specimens.

5. After-ripen if necessary: unripe fruits can undergo after-ripening in a warm place.

6. Ensure proper conditions: cool temperature (+10…+15 °C), moderate humidity (50–70%), good ventilation, no light, single-layer placement on bedding.

7. Prevent mechanical damage: handle fruits gently, do not throw or roll them.

8. Protect from dampness: store only dry fruits, do not wash them before storage.

By following these simple rules, you can preserve your harvest until spring, and sometimes even longer (Wehner et al., 2020; Nonnecke, 1989). Remember that pumpkin storage ability is the result of care for the plant at all stages: from variety selection to proper storage. Good luck and bountiful harvests!

References

Abbey, L. (2016). ‘Cucurbits Physiological Stages of Growth’, in Pessarakli, M. (ed.) Handbook of Cucurbits. Growth,Cultural Practices, and Physiology. New York, NY: CRC Press, pp. 151-170.
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