It’s a common problem affecting cucumbers.
Eventually, the leaves turn yellow and die.
Move potted cucumber plants to a location with afternoon shade, such as under an umbrella.
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Generally, cucumbers need high amounts of phosphorous and potassium.
Work in aged compost or add a balanced NPK fertilizer.
Insect Pests
Sap-sucking pests cause leaves to turn yellow and die off and also spread disease.
The presence of ants are a clue your cucumber plant may have aphids.
The pests leave behind a substance called honeydew that attracts ants.
Cucumber Plant Diseases
There are a few plant diseases that can cause the yellowing of cucumber leaves.
Adjusting the amount of water and sunlight often solves the issue.
The leaves of an overwatered cucumber plant are yellow or brown and wilted.
Yes, you should cut yellow leaves off a cucumber plant.
Removing yellow leaves allows the plant to put energy into creating new healthy growth.
Photo Gallery of Vegetable Problems.
Cucumber: A Brief History.
Nutrient Deficiency of Vegetable Plants.
University of Maryland Extension.
Texas A&M AgriLife Extension.
University of Minnesota Extension.
University of Minnesota Extension.
