Yellow Leaves in Courgette (Zucchini)
Courgettes are fast-growing, prolific vegetables that can produce abundantly from a single plant
Courgette (Zucchini) care requirements
These care conditions are most relevant to yellow leaves in Courgette (Zucchini). Check each one as a potential cause.
Symptoms to look for in Courgette (Zucchini)
Yellowing typically starts on older, lower leaves, sometimes with the whole leaf yellowing before the plant shows other symptoms.
Common causes in Courgette (Zucchini)
Most often a nutrient deficiency once the plant is fruiting heavily (courgettes are hungry feeders needing potassium once flowering begins) or inconsistent watering.
How to diagnose yellow leaves in Courgette (Zucchini)
Check soil moisture first. Wet soil + yellow lower leaves = overwatering. Dry soil = underwatering. Yellowing between veins = nutrient deficiency.
How to treat yellow leaves in Courgette (Zucchini)
Resume regular high-potassium feeding once flowering and fruiting begins, and ensure watering is deep and consistent rather than sporadic.
Preventing yellow leaves in Courgette (Zucchini)
Feed with a high-potassium fertiliser once flowering begins, and mulch around the base to keep soil moisture consistent.