Check these first
- Inspect the undersides of leaves for slugs during the evening.
- Look for shiny slime trails on the soil around the bulbs.
- Check if the soil is staying too wet for too long.
Likely causes
Slug and snail infestation
Most likelyHow to tell: You will see irregular holes in the leaves or petals and slimy trails on the soil surface. They often feed at night, leaving the plant looking ragged by morning.
What to do: Handpick the pests in the evening when they are active. You can also place copper tape around the planting area or use iron phosphate bait pellets according to the package instructions.
Excessive moisture
PossibleHow to tell: Damp, soggy soil creates the perfect humid environment for slugs to thrive. If your soil stays wet for days, it attracts more pests.
What to do: Improve drainage by adding grit or sand to the soil. Water only when the top inch of soil feels dry to the touch.
When to worry
Worry if the flowers are being eaten before they can fully open. Minor leaf damage is usually not fatal to the bulb.
Stopping it coming back
Keep the area around your bulbs clear of debris and mulch where slugs like to hide during the day.
Not sure which one it is? Photograph your autumn crocus.
This page lists the usual causes. Pocket Botanist looks at your actual leaf and tells you the likely cause, how serious it is, and what to try first. Identification and a health check are free.
Questions people ask
- Will my plant recover if the leaves are eaten?
- Yes, as long as the bulb remains healthy, the plant will grow back next season. Focus on protecting the new growth.
- Are beer traps effective?
- They can work, but they often attract more slugs from neighboring areas. Handpicking is usually more effective for small garden beds.
More problems with Autumn Crocus
Back to the Autumn Crocus guide
This article was generated with AI from the plant’s care profile and is general information, not horticultural advice. Read about how we build these guides.

