What Causes Cucumbers To Turn Yellow?


If you give your cucumbers the attention they need, they will flourish. It is necessary to water cucumber plants often throughout the growing season due to their shallow roots and constant need for hydration. Many gardeners worry about what causes cucumbers to turn yellow? In order to avoid yellowing, cucumbers must be harvested often since they are quick growers. Cucumbers become yellow when they are overripe, but how can you tell when they are ripe and what causes cucumbers to turn yellow?

What Causes Cucumbers To Turn Yellow?

Ripe Cucumbers: How to Spot the Signs

Harvesting cucumbers isn’t a precise science. Cucumbers, on the other hand, are normally ready for harvest in the 50 to the 70-day range after sowing. When cucumber is a brilliant medium to dark green and firm, it is called ripe.

Cucumber harvesting should be avoided if the fruit is yellow, bloated, sunken, or wrinkled. These are beyond their prime and should be thrown away as soon as possible.

Cucumber Picking Season

Cucumbers that are still young are often consumed. Cucumbers may be picked once the seeds are soft or the seeds become too seedy. Because thin cucumbers tend to contain fewer seeds than broader ones, you may wish to remove them off the vine and buy smaller ones instead. Cucumbers are often selected based on their length, which ranges from 2 to 8 inches (5-20 cm) on average.

As a rule of thumb, cucumbers should be picked when they’re the right size for their intended usage and variety. Pickling cucumbers, for example, are significantly smaller than those that are used for slicing purposes. Cucumbers should be picked at least twice a day since they grow so fast. This article is about what causes cucumbers to turn yellow?

What causes cucumbers to turn yellow?

What causes cucumbers to turn yellow? Cucumbers have been turning yellow for some time now, and many people are puzzled as to why. Cucumbers should not turn yellow if you want them to be fresh. Yellow cucumbers are frequently overripe; if you see one, you should avoid it. Cucumbers lose their chlorophyll-derived green color when they’re overripe, resulting in a yellow hue.

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Size and yellowness make cucumbers unsuitable for human eating. A virus, too much water, or a nutritional imbalance may all cause a yellow cucumber. It is possible to grow yellow cucumbers by planting a yellow-fleshed cultivar such as the lemon cucumber, which is a tiny, yellow-fleshed type. Let’s discuss all factors in detail what causes cucumbers to turn yellow?

Late Harvesting

One of the most prevalent causes of yellowing cucumbers is over-harvesting them. Cucumbers lose their dark green hue as they develop, becoming yellow or orange in the process.

Cucumbers of this kind have a regular form, although they may be rather enormous. All they’ve done is grow for far too long now.

Leaving cucumbers on the vine for too long also reduces the number of cucumbers that may be harvested. Cucumbers produce more fruit when they are harvested often.

It’s bitter to eat cucumbers that have been on the vine too long.

The simplest solution to this problem is to harvest them earlier. The female cucumber blooms should be pollinated, and their growth should be monitored every day after that. After pollination, most plants are ready for harvest in 10 days or less.

In 50 to 70 days after planting, cucumbers are ready for harvesting, depending on the variety. Cucumbers that are ready to pick are a vivid medium to dark green color and firm to the touch.


If you over-water your cucumber plants, you risk removing calcium and nitrogen from the soil.

Cucumbers will turn yellow early in this case, much before they would be harvested.

This problem can be solved by postponing your trip to the beach. Only 2 inches of water a week are needed in the warmest heat and only 1 inch in average temps.

When watering cucumber plants, don’t leave them with damp feet since they have a shallow root system that likes it. They become yellow as a result of this.

Water thoroughly and gently two or three times each week for optimal benefits. Overdoing it deprives the soil of vital nutrients.

Because of this, a wet season might result in a poor harvest.

Improper Nutrition

Cucumbers need a precise combination of nutrients to thrive. Cucumber leaves and fruit may become yellow due to a lack of fertilization. Insufficient fertilization will cause cucumbers to remain little and yellow rather than grow to their normal size.

It’s possible to avoid this by using a balanced fertilizer at planting time, or by adding compost to the soil. During the growth season, fertilize roughly once every two weeks after blooming and then once a month after that.

Yellow cucumbers may be avoided in part by crop rotation. If you plant your cucumbers in the same spot every year, the soil will get deprived of the minerals it needs to support good growth.

You may say the same about every garden produce. It’s time to switch things up!

Lack of pollination

A lack of pollination is a typical cause of cucumbers that are misshapen and yellow. Poor pollination is most likely to blame if your plant produces a fruit with a smaller end than the rest of the cucumber.

Each flower must be pollinated several times in order for the fruit to properly develop. To get the best-shaped and-colored cucumber from your plants, you need honeybees to pollinate your plants.

Because there is visible fruit, pollination has happened, but not enough pollination has resulted in the malformed fruit. As a result, this issue may arise when pollen is killed by high temperatures.

Tomatoes that fail to become red in the heat are likewise a sign of high temperatures. Get to the bottom of why this occurs and how to get the most out of your tomatoes while they’re still green.

It is a good idea not to use pesticides in the vegetable garden to enhance pollination. Honey bees may be deterred even by organic insecticides.

Planting a wide variety of blooming herbs and annuals is another strategy to attract pollinators. In addition to flowers like zinnia, black-eyed Susans, and sunflowers, dill and basil are excellent options.

You can self-pollinate cucumber plants if you’re an ambitious gardener who doesn’t have access to adequate insect pollination.

There are two types of flowers: male and female. Pick the male flowers and sprinkle the pollen on the female flowers to get them to bloom.

What Causes Cucumbers To Turn Yellow?

To tell male flowers from female ones, look for the lack of small fruit behind them. As soon as it blooms, the female flower bears a little fruit in her stamens.

Crop Viral Diseases

Cucumber mosaic virus, for example, may cause the fruit to become a yellow-green tint over time. As a side effect, this virus makes cucumbers bitter.

Cucumber leaves are speckled and deformed as a result of this virus.

What Causes Cucumbers To Turn Yellow?

As a result of the virus’s distortion of the leaves, the plants are unable to develop and cease expanding. This might result in cucumbers with white or yellow mottling that are tiny and stunted.

It’s not as simple as delaying watering or harvesting earlier to avoid this illness.

Keep the aphids and cucumber beetles that carry the virus away from the plant by covering rows at planting time. Remove and kill any plants that are showing indications of the disease.

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Early in the growing season, remove row coverings. It is not uncommon for people to use insecticidal soap to protect their cucumbers against the cucumber mosaic virus.

Plants other than fruiting ones, such as the gloriosa lily, are also susceptible to this virus. Even weeds may be infected.

It seems that cucumber plants which grow vertically on a trellis or in the middle of the garden, tend to be less vulnerable to this fungus. This is all about what causes cucumbers to turn yellow.

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