Troubleshooting
Autumn Crocus problems — and how to fix them
Autumn Crocus (Colchicum autumnale) 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.
Corm rot in wet soil
Ensure excellent drainage, especially during summer dormancy when the corm sits in the ground without protective foliage.
Slug damage to flowers
Autumn slugs can devastate the flowers; apply organic pellets as the bare flowers emerge.
Collapse of flower stems
Caused by waterlogged soil or collar rot; review drainage and avoid planting in depressions.
Leaf mottling (virus)
Yellow streaking or mosaic patterns may indicate a viral infection; remove and destroy affected plants to prevent spread.
Overcrowding
Reduces flowering over time; lift and divide corms every 4-5 years in late summer before flowers emerge.
Prevent autumn crocus problems before they start
Most autumn crocus issues are care-mismatch, not bad luck. Dial in the basics:
Autumn Crocus problems — FAQ
Why is my autumn crocus corm rot in wet soil?
Ensure excellent drainage, especially during summer dormancy when the corm sits in the ground without protective foliage.
Why is my autumn crocus slug damage to flowers?
Autumn slugs can devastate the flowers; apply organic pellets as the bare flowers emerge.
Why is my autumn crocus collapse of flower stems?
Caused by waterlogged soil or collar rot; review drainage and avoid planting in depressions.
Why is my autumn crocus leaf mottling (virus)?
Yellow streaking or mosaic patterns may indicate a viral infection; remove and destroy affected plants to prevent spread.
Why is my autumn crocus overcrowding?
Reduces flowering over time; lift and divide corms every 4-5 years in late summer before flowers emerge.