17 Useful Cucumber Leaves Turning Yellow [Culprits + Fixes]

Cucumber Leaves Turning Yellow? Do you want a good summer treat containing high minerals and vitamins beneficial to your body?

Cucumber is no doubt amongst tasty garden vegetables that will keep you hydrated when it’s summer. The good thing about them is they are easily cultivated with no stress.

Meanwhile, as your crops are flourishing and you notice cucumber leaves turning yellow, it is crucial to assess your cropping environment.

In today’s post we will be addressing these Cucumber crops concerns;

  • What Makes Cucumber Leaves Turn Yellow?
  • How To Treat Yellowing Cucumber Leaves
  • Yellow Cucumber Leaves Epsom Salt
  • Cucumber Leaf Diseases
  • Cucumber Leaves Drooping
  • Cucumber Wilting After Transplant
  • How To Save My Dying Cucumber Plant
  • How To Fix Overwatered Cucumber Plant
  • When My Cucumber Crop Is Inside A Container,
  • How Can I Prevent The Leaves From Going Yellow?
  • Should I Cut Off Yellow Cucumber Leaves?

What Makes Cucumber Leaves Turn Yellow?

Let’s find the potential things that make Cucumber Leaves Yellow.

1. Issues With Soil

It is typical of Cucumbers to demand soil nutrients because they are famously heavy consumers of soil nutrients. Yellow spots on cucumber leaves will definitely become visible if your crop’s feed lacks adequate Nitrogen.

Necessary components required for your crop’s growth and encouragement of leaves development include Nitrogen. For your cucumber crop leaves to maintain their healthiness and colour, you must supply them with sufficient Nitrogen.

2. Issues With Water

Both under-watering and overwatering can induce cucumber plants’ yellowing. Giving your cucumber crop 1 to 2 inches of water each week is the appropriate watering they need.

Like with any other crop, cucumbers may be overwatered, excessive water would produce oxygen-deprived cucumber roots, causing your crop’s leaves to become yellow or droop.

3. Issues With Sunlight

A bright, sunny place within your garden is the ideal location for cultivating cucumbers. Now, if your cucumber crops are not getting adequate sun exposure, their foliage will droop and develop yellow.

You should consider relocating your cucumber crops to a location where they will receive at least six hours of direct sunlight each day.

Cucumber leaves turning yellow and brown is also frequently caused by bugs as well as other garden pests.

How To Treat Yellowing Cucumber Leaves

It is crucial to determine what is causing your cucumber plant to go yellow before correcting the yellow leaves on your crop.

How To Treat Yellowing Cucumber Leaves
How To Treat Yellowing Cucumber Leaves
  • First off, you must check for any indication of Bacterial diseases or pests. The upper surface and the underneath of your cucumber leaves is a great place to start for visible pest and disease indicators.
  • After discovering little bugs underneath or on top of your crop’s leaves, you will have to pinpoint their species and also prevent their spreading.
  • Organic measures such as soap-mixed neem oil or pesticide will be effective and also stimulate your crop back to healthiness.
  • In a situation where little bugs or diseases are not the reason for your cucumber yellow leaves, you should focus more on the appropriate caring of your crop. Reassess the amount of sun exposure and your watering routine.
  • It is also crucial to examine the growing medium of your cucumber crop. If your soil happens to be the reason for yellow on cucumber leaves, you must replenish it using a 2 inches overlay of natural organic components.
  • These organic components will improve air movement to your oxygen-depleted crop roots while also supplying appropriate nutrients to your cucumber plant.
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Yellow Cucumber Leaves Epsom Salt treatment

You may find that your crop yields less and fewer cucumbers over time even though cucumbers are bountiful throughout the summer. Magnesium insufficiency is the cause of this.

If you want an indication that your crop is suffering from a sulfur shortage, you can notice it in the appearance of your crops as cucumber seedlings turning yellow.

Why do you need Epsom salt? Because it includes combined magnesium and sulfur, magnesium sulfate is another name for Epsom salt.

When you introduce it to the ground of your cucumber plants, it helps to correct shortages with one or both of the aforementioned components(Sulphur or Magnesium), which helps to cure cucumber vines turning yellow.

Epsom salt should not be used as a fertilizer, that is the most essential thing to remember.

common Cucumber Leaf Diseases

1. Alternaria Leaf Blight

Alternaria Leaf Blight is a fungal infection that is common in developing places with extreme temperatures and constant rains.

Among the indicators of this cucumber diseases yellowing of leaves; Lesions develop as little yellow blotches having a yellow or green border on the oldest leaves.

Without immediate action the infection will advance on your cucumber leaves, the lesions will enlarge and then become enormous necrotic patches, typically with spiral patterning.

Sooner, the lesions will aggregate, your leaves will droop and finally die.

After collection, crop waste must be cleared from the area as soon as appropriate or buried firmly into the ground. The use of proper preventive fungicides can assist to halt the advancement of the infection. You can manage this disease by performing the above.

2. Cercospora Leaf Spot

Another cucumber leaf disease is Cercospora Leaf Spot. It is a fungal infection that can be transmitted through water splashes and wind. Cercospora Leaf Spot is most common in tropical and subtropical cultivating areas. This fungal lives on plant waste.

On mature leaves of your crops, the first signs of this infection appear as little dots of yellow on cucumber leaves. Then Lesions grow to cover huge sections of your crop’s leaf top layer as the illness proceeds.

A black border, as well as a chlorotic region, may be seen around the lesions. Lesions on your crop’s leaves can get brittle and break in their cores.

This disease is a progressive disease, if you notice any of these symptoms on your cucumber leaves, it is an indication that your crop is suffering from Cercospora leaf spot.

The way forward with this disease is to avoid future spread and any unhealthy crops must be uprooted and burned.

Top Reasons why Cucumber Leaves Drooping?

In a matter of seconds and unexpectedly, your cucumber’s foliage could become droopy and withered from being huge and luscious. Continue reading to find out if or not it’s easily remedied and also what’s triggering cucumber vines wilting and dying.

Cucumber Leaves Drooping
Cucumber Leaves Drooping

1. Drooping Caused By Beetles

Cucumber beetles may spread bacterial wilt infection on your crop by chewing perforations on your cucumber branches, leaves, and blossoms. Each leaf gets dull and droopy as the highly deadly illness emerges and swiftly develops as your whole crop dies.

Plant a burpless cucumber type instead which cucumber bugs will avoid because the sick crop must be removed since it cannot be restored. 

2. Leaf Droop Caused By Weather

When your surrounding temperature rises beyond 29°C (85°F), this becomes heat stress for your cucumber crops. In turn, your cucumber plant leaves in particular will droop. Cucumbers dislike extreme heat.

Whenever temperature changes of your atmosphere are less than 29°C (85°F), start giving your cucumbers 1 inch of water every week to counteract heat-related drooping. Significantly raise it to 2 inches each week if it’s significantly warmer or there’s an extended long drought.

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The issue of weather drooping cucumber leaves can be aggravated by drier breezes since the big leaves of your crops end up losing more water than their roots could restore.

Why Cucumber Wilting After Transplant?

It is typically simple to determine what is triggering cucumber plant leaves wilting after transplanting since it is a regular issue. In certain cases, the crop can be saved and restored to health.

Even though a variety of factors might trigger your cucumber crops to wilt following transplantation, the following are the most typical:

1. Diseases And Bugs (Pests)

Diseases as well as bugs (pests) could be a main cause of your cucumber crop wilting after transplantation, it is based on how shortly following transplanting you notice cucumber plant issues.

It’s doubtful that diseases or bugs are the cause of wilting if wilting happens right following transplantation. The common bugs are Powdery Mildew, Mealybug, and Thrips.

However, wilting cucumber crops following transplantation could be caused by a variety of illnesses and pests such as bacterial wilt. They are actually the most prevalent cause.

2. They Were Damaged While Being Transplanted

Intertwining your cucumber root systems is the first sort of harm to be mindful of. When your cucumber crops are cultivated inside under congested settings, their root systems might tangle together. To prevent harm, be gentle while detaching them.

It is quite simple to inflict damage during transplantation because you’re not cautious. Your cucumber crops will frequently wilt as a result of this.

Try pruning your sprouts following plant growth to avoid this intertwining of root issues.

Another typical issue is root damage. When you transfer your crops outside, this is a common occurrence, especially if your crops already have a well-developed root system.

3. An Excessive Amount Of Fertilizer Was Applied

Applying fertilizer just after transplanting your cucumber crops should be done with caution. Fertilizer burn occurs on your crops when there is too much, resulting in wilted leaves.

For gently discharging fertilizer into your crop’s soil, consider applying a slow-release fertilizer for your cucumber, which will progressively degrade over time, enabling root absorption.

Slow release fertilizer is advisable because fast-release fertilizers might be difficult to use on your cucumber, particularly if your crops haven’t been properly watered.

How To Save My Dying Cucumber Plant?

Your Cucumber crops may be revived and many occurrences of wilt can be avoided if the reason is correctly identified and treated immediately.

Overwatered cucumber crops cause the majority of cucumbers wilting and dying, while infection or pests can also induce wilt. Here are some approaches to consider:

1. Your Cucumber Crops Should Be Mulched

Mulches help decrease plant conflict and reduce pest vectors by suppressing weed development.

To reduce the evaporation of your crops and conserve their soil dampness, apply a 2-inch coating of straw mulch to your cucumber ground. Doing this will save your plant from dying.

On warmer days, cucumbers that have been mulched might droop a little, however, they will recover fast once the temperatures drop at nighttime.

2. Properly Water Your Cucumber Plant

In hot weather, water your cucumber often regularly since the soil dries up faster. Overwatering might be responsible for your cucumber dying if the soil seems moist or soggy.

Once you discover your soil to be moist or soggy, you must limit the amount of water you use and allow your soil to dry gradually.

1 to 2 inches of water each week is sufficient to maintain the upper 6 inches of your cucumber crop’s soil equally wet.

To know how urgent your cucumber needs watering, touch the ground around your cucumber’s root. When more than the topmost 1 inch of it’s soil seems parched, you should water instantly.

3. Your Crops Should Be Nourished

A lack of nitrogen enriched nutrient can cause wilting, yellowing foliage and eventually death of your cucumber plant, whereas nitrogen nutrient administration results in lush, green leaves.

To discourage your cucumbers against withering off, use a quarter cup of 21-0-0 nitrogen nutrient to each of your cucumbers as your crops start to shoot out vines. Water the nutrient into the crop’s soil once it has been sprinkled 6 inches away from the crops.

How To Fix Overwatered Cucumber Plant?

First and foremost, cease watering your crop and let it dry up. It may take many days to finish this activity. Wait until you’re certain the roots and soil have dried before watering your cucumber plants again.

  1. Plants that are overwatered experience difficulty transferring water. In addition, excessive sun contact can cause the cucumber plant’s top limbs to dry up and perish.
  2. It is feasible to preserve your cucumber crops if they have gotten a fungal infestation through overwatering. However, immediate detection and response will be required.
  3. Remove your cucumber crop from sun exposure if you are developing it in a vessel or pot. The top leaves are protected by putting them inside the shade.
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When My Cucumber Crop Is Inside A Container, How Can I Prevent The Leaves From Going Yellow?

You can keep up with the below measures to preserve your cucumber crop inside a planter (container) looking fresh and green.

1. Pesticides Should Be Used On A Regular Basis

Since fruit is tasty, pests will be drawn to it. To preserve your cucumber crop bug-free, disinfect it on a constant schedule.

2. Provide Your Cucumber Crop with the Required Nutrients

On a consistent basis, you should treat your crop with organic nutrients to keep it green. To avoid overfeeding, review the nutrient instructions.

3. When Planting, Utilize The Appropriate Equipment

When growing your cucumber crop inside a planter, you’ll need two essential pieces of equipment.

The very first course of action is to double-check that the container has a discharge opening at the base. A medium that drains well sufficiently for your plant is the next essential effective tool.

4. Constantly trim your crop.

Trimming your cucumber crop on a constant schedule allows air to flow all through its stem and leaflets. Mold with mildew could grow on and throughout your crop if airflow cannot move adequately.

To prevent the disease from spreading from one crop toward the next, you must clip off yellow cucumber plant leaves

as soon as you see them.

Should I Cut Off Yellow Cucumber Leaves?

The fast and easy response is that it is safe to remove yellow cucumber leaves. Remove all yellow leaves on your Cucumber crops and prune their vines to control their development and increase their reproduction, or blossoming.

All throughout the developing season, trim the outer stems, leaves, blossoms, plus the fruit of your Cucumber crops as warranted. Proceed by pruning your cucumber vines by cutting off each and every dead or yellowing part.

Mature leaves of your crops should be pruned to let sunshine reach growing fruit, also to prevent yellow on cucumber leaves as well as to increase circulation of air.

Cucumber vines have many branches that grow from a common stem. All sprouts that grow from your crop’s primary vine stem should be removed. Make a trim as near to the primary stem of your cucumber plant as feasible as it can be from the top of the sprout.

When you trim your Cucumber crops and remove yellow leaves, it keeps the alignment between your crop’s vine development and fruit yield in check.


Q: What Do Overwatered Cucumber Leaves Look Like?

Overwatering is frequently shown by leaf yellowing. Overwatered leaves become shriveled and brittle, and they eventually break off.

Q: Do Cucumbers Like Full Sun?

Cucumbers need to be cultivated in direct sunshine.

Q: What Fertilizer Is Best For Cucumbers?

Cucumbers require a fertilizer with balanced nitrogen content, as well as a significant proportion of phosphorus and potassium.

Q: Are Coffee grounds Good For Cucumber Plants?

Coffee grounds inside the soil will encourage cucumber crops to develop faster and stronger.


Cucumber Leaves Turning Yellow is critical to keep an eye on the condition of your cucumber crop.

You may accomplish this by treating your crop for pests and diseases on a regular basis, removing all cucumber plant going yellow, utilizing the correct equipment while potting your crop, and supplying your crop nutrients and vitamins on a constant schedule.

You’ll have healthy cucumbers ready in no time when you implement these guidelines.