One such factor that contributes to the discolouration of cucumber plants is a magnesium shortage (yellow, black, white. and brown). A lack of magnesium is typically brought on by an overabundance of other minerals including potassium, calcium, and ammonium.
How to fix cucumber plant problems?
THE LEAVES ON CUCUMBERS ARE YELLOWING URGENTLY TAKE ACTION OTHERWISE THERE WILL BE NO HARVEST
This issue with the cucumber plant may be remedied by using a fertilizer that has a good overall balance. In addition, adjust the acidity or alkalinity of the soil as necessary. When looking for cucumber plants that are suffering from a zinc deficit, be on the lookout for older leaves that have yellowing between the veins.
What are the black spots on my cucumber leaves?
Leaf of a cucumber infected with anthracnose The symptoms of anthracnose include the appearance of yellow circles with dark brown rims that occasionally seem black. They are initially rather little, but as the disease progresses, they grow to become much larger.
How do I know if my cucumber plant has potassium deficiency?
Or you may sprinkle liquid iron on the plant. Yellowing of the leaf tips and margins is a sign of potassium insufficiency, which may be diagnosed by looking at the leaves. Young leaves have a tendency to be tiny and look lifeless. They also have a cupped or puckered appearance.