Causes of Pepper Leaves Turning Yellow
Pepper Plant Leaves are Yellow Due to a Lack of Water and Nutrients
One of the two most common reasons for yellow leaves on a pepper plant is either under watering or a lack of nutrients in the soil. In both of these cases, pepper plants will also be stunted and will commonly drop the pepper flowers or fruit. If you think this is the reason your pepper plant leaves are yellow, increase watering and apply some balanced fertilizer.
Disease Can Cause Pepper Plants with Yellow Leaves
Another thing that can cause pepper plant leaves to turn yellow is disease. Diseases like bacterial leaf spot, wilt and phytophthora blight can cause yellow leaves on a pepper plant. Typically, these diseases will have some other effect on the pepper leaves, such as brown leaf spots in the case of bacterial leaf spot, or wilted leaves in the case of wilt and phytophthora blight. Unfortunately, most diseases that affect peppers are untreatable and the plant must be discarded; you won’t be able to plant another nightshade vegetable in that location for a full year.
Yellow Leaves on a Pepper Plant Caused by Pests
Pests can also cause pepper plants with yellow leaves. Pests like mites, aphids and psyllids will suck on the plant and divert nutrients and water. This will cause the pepper plant leaves to turn yellow. If you suspect that the yellow leaves on your pepper plant are caused by pests, treat the plant with an insecticide. Neem oil is a good choice, as it only kills harmful pests and does not affect people, animals or beneficial insects. While pepper plants with yellow leaves are frustrating, they don’t need to be. Check your plants carefully and in no time at all, the yellow leaves on your pepper plant will be a thing of the past.
