Curved Cucumbers (2024)

October 4, 2021

Wenjing Guan, Assistant Professor, Department ofHorticulture and Landscape Architecture, Purdue University

Greenhouse and high tunnel grown cucumber is a high value crop. Any kind of deformed fruit can reduce the value. Disease or insect damages weaken plants that can cause deformed fruit, but what is often overlooked are the other factors not related to pest problems. This article discusses the potential reasons that may cause cucumber fruit become deformed in protected production systems.

  1. Pollination. The same as many other fruit vegetables, insufficient pollination can cause deformed cucumbers. However, in the case of greenhouse grown cucumbers, majority of the varieties are parthenocarpic, which do not need pollination. Interestingly, if pollination does occur, it can also lead to deformed fruit.
  2. Temperature. Cucumbers are best grown when temperature is above 65 °F. Lower temperature may affect flower bud differentiation and lead to development of curved cucumbers (Figure 1). We observed this symptom happened more often in early seasons in a high tunnel production system.
  3. Water. Cucumbers require a large amount of water. If water supply is insufficient or ununiform, fruit expansion rate is inconsistent that can result in poor-shaped fruit (Figure 2 and 3). We observed the symptom happened more often during hot summer. When temperature is high, fruit develop fast and they are more susceptible to ununiform water supply.
  4. Mechanical injury. Growth of expanded cucumbers can be inhibited by clips, strings, stems, and tendrils. All of them may result in deformed fruit (Figure 4). Deformed cucumbers reduce the crop value. Severely deformed fruit should be removed as soon as possible so plant energy can be allocated to a newly developed cucumber fruit.
Click image to enlarge

Curved Cucumbers (1) Figure 1

Curved Cucumbers (2) Figure 2

Curved Cucumbers (3) Figure 3

Curved Cucumbers (4) Figure 4

Curved Cucumbers (5)

Curved Cucumbers (2024)

FAQs

Why is my cucumber curved? ›

Cucumbers are best grown when temperature is above 65 °F. Lower temperature may affect flower bud differentiation and lead to development of curved cucumbers (Figure 1). We observed this symptom happened more often in early seasons in a high tunnel production system.

Can I eat misshapen cucumbers? ›

Cucumbers distorted by poor pollination are perfectly fine to eat.

What does it mean when cucumber curls? ›

Pollen requires semi-humid, warm conditions to be as its best, and when it's too dry or prolonged rains occur during flowering, cucumber ovaries may not be fully pollinated. You can hand pollinate cucumbers to achieve better pollination results, but if the weather is against you, fruits may still curl.

Why are my cucumbers round instead of long? ›

Poor pollination - If your cucumber is funny shaped, you might have a problem with pollination. If there is a lack of insects in your garden area because you have been so diligent in removing or destroying them, you might find that there is nothing to pollinate your cucumbers.

What is the name of the curved cucumber? ›

Armenial cucumbers

Another delightful cucumber that's actually, botanically, a melon is the Armenian cucumber, also called a snake melon. This large beauty has pale green skin and light colored flesh. When mature, the fruit becomes thicker in the middle than at the ends and curves gently.

Why is my cucumber plant curling? ›

Cucumber leaves curling? Temperature and humidity might be throwing a fit. Extreme heat or cold forces leaves into survival mode, curling up or drooping down. Keep the air around your cucumbers as balanced as a tightrope walker—aim for that sweet spot where they're not shivering or sweating.

How do you tell if you are overwatering cucumbers? ›

💦 Overwatering Cues

Yellow, limp leaves are the classic cry for help; they're practically waving a white flag. If the leaves sport crispy brown edges or curl up, it's a sign they're drowning in excess moisture. Wilting flowers without any baby cukes in sight?

How do you know when a cucumber is not good to eat? ›

When cucumbers have a slimy film or start to get mushy, that's a sign that they've gone bad and should be composted. “Cucumbers have a high moisture content. That is what makes them a great hydrating food.

Is it OK to eat wrinkled cucumber? ›

Avoid cucumbers that are yellow, puffy, have sunken water-soaked areas, or are wrinkled at their tips. Also, avoid those that have bulging middles. Overripe cucumbers, with large seeds and watery flesh, will have a poor taste. Slender, firm, bright, medium to dark-green cucumbers will taste the best.

Why are my cucumbers hourglass shaped? ›

Inadequate or inconsistent moisture can cause oddly shaped or poor-tasting fruit. If possible, water your cucumbers with a soaker hose or with drip irrigation to keep the foliage dry. This helps prevent leaf diseases that can affect the plant.

How often should cucumbers be watered? ›

Vine crops are heavy water feeders, so you should constantly check soil moisture. Cucumbers need about one inch of water from rainfall or irrigation each week during the growing season. Always soak the soil thoroughly when watering. Water sandy soils more often, but with lower amounts applied at any one time.

Why are my cucumbers so big but not green? ›

Cucumbers need sunlight to develop and maintain their green color. You may be able to position the fruit so that it receives enough light. If not, snip out a large leaf or two to let the sunlight in. Excessive moisture results in white cucumbers because water leaches nutrients from the soil.

Why are my cucumbers growing in a ball shape? ›

This can result from poor or inconsistent watering. I would make sure they are watered regularly. In the morning is the best time. Here's a tip to pollinate your cucumbers.

What are the curling things on cucumber plants? ›

While they may look like tentacles, the thin, curly threads that come off the cucumber are actually natural and normal growths on your cucumber plant. These tendrils (not tentacles) should not be removed.

Why is my cucumber plant leaning? ›

🥒 Why Are My Cucumber Leaves Falling Over? Adjust watering and soil moisture to prevent cucumber leaf droop. Nutrient balance is key; ensure potassium and magnesium levels. Support and protect leaves with stakes and environmental adjustments.

References

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