The most common cause of yellow pepper leaves is a nutrient deficiency, particularly of nitrogen. Symptoms include:
Leaves turning yellow, starting from the bottom of the plant and moving upwards Stunted growth and reduced flowering/fruiting Older leaves turning yellow first
To fix: Apply a balanced vegetable fertilizer or compost to provide a range of nutrients
Use a nitrogen-rich fertilizer like ammonium sulfate or blood meal to boost nitrogen levels Test soil pH and amend if needed to improve nutrient availability
Watering Issues Over or under-watering can both lead to yellow leaves. Signs include: Leaves wilting and turning yellow Leaves turning yellow randomly across the plant
To fix: Water when top inch of soil is dry, providing about 1 inch per week Ensure good soil drainage to prevent waterlogging
Pests Sucking pests like aphids and spider mites can cause leaves to yellow. Look for: Leaves turning yellow and wilting Presence of bugs on undersides of leaves