Onion Tops Turning Yellow
Leaves problem · common pattern reported by gardeners · verify locally
What you'll see
- Leaf tips yellow
- Yellowing down the leaf
- Foliage flops
Most common causes
- Normal maturation (bulbs ripening)
- Fungus (purple blotch)
- Overwatering
- Onion thrips
How to fix it
- If bulb is ready, harvest
- Check for thrips (tiny insects)
- Let soil dry between watering
Prevention: Rotate onion beds Good drainage Inspect for thrips weekly
More Onion problems
Grow Onion with confidence
Open the Onion growing guide → · Planting calendar · Pest & problem diagnoser
ZoneFig content reflects widely published extension-service and gardening guidance. Symptoms and causes are common patterns, not a diagnosis for any individual plant — verify locally and treat conservatively.