Troubleshooting
Butterhead Lettuce problems — and how to fix them
Butterhead Lettuce (Lactuca sativa var. capitata 'Butterhead') is generally forgiving once you match its basics, but a few issues come up again and again. Here is what each one looks like, why it happens, and the fix.
Bolting
Hot weather or water stress sends plants into premature flowering, turning leaves bitter. Sow in cool seasons, keep moisture steady, choose bolt-resistant types and provide summer shade.
Slugs and snails
The soft leaves are a magnet for slugs, especially in damp UK conditions. Use barriers, traps, nighttime collection or wildlife-safe controls around young plants.
Tip burn
Brown, scorched leaf margins from calcium not reaching fast-growing tissue, usually due to uneven moisture or heat. Keep watering consistent and avoid heat stress.
Downy mildew
Yellow patches on top of leaves with greyish mould beneath in cool, damp weather. Space plants for airflow, water the base, and remove affected leaves.
Prevent butterhead lettuce problems before they start
Most butterhead lettuce issues are care-mismatch, not bad luck. Dial in the basics:
- Common lettuce problems — the species this cultivar belongs to
- Common butterhead lettuce problems — our other guide for the same plant
- What's wrong with my plant? — the diagnosis apps compared
- Butterhead Lettuce watering schedule
- Butterhead Lettuce light requirements
- Best soil mix for butterhead lettuce
- Butterhead Lettuce temperature & humidity
- Full butterhead lettuce care guide
Looking for butterhead lettuce in general rather than its problems? Read the full butterhead lettuce care guide — light, water, soil and feeding.
Butterhead Lettuce problems — FAQ
Why is my butterhead lettuce bolting?
Hot weather or water stress sends plants into premature flowering, turning leaves bitter. Sow in cool seasons, keep moisture steady, choose bolt-resistant types and provide summer shade.
Why is my butterhead lettuce slugs and snails?
The soft leaves are a magnet for slugs, especially in damp UK conditions. Use barriers, traps, nighttime collection or wildlife-safe controls around young plants.
Why is my butterhead lettuce tip burn?
Brown, scorched leaf margins from calcium not reaching fast-growing tissue, usually due to uneven moisture or heat. Keep watering consistent and avoid heat stress.
Why is my butterhead lettuce downy mildew?
Yellow patches on top of leaves with greyish mould beneath in cool, damp weather. Space plants for airflow, water the base, and remove affected leaves.