Troubleshooting
Roundleaf Sundew problems — and how to fix them
Roundleaf Sundew (Drosera rotundifolia) 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.
Rot during winter
Standing water on the dormant hibernaculum causes rot. Keep merely damp, not flooded, and ensure airflow over winter.
Plant declines after a year indoors
It needs a real cold dormancy (around 0-10°C for 3-4 months). Without winter chill it weakens and dies; grow it outdoors or in an unheated space.
Green, dewless leaves
Too little light or mineral-laden water. Give full sun and use only rainwater or RO.
Leaves blacken in autumn
Normal dormancy onset, not disease — the rosette is retreating to its hibernaculum. Reduce water and leave it cold.
Prevent roundleaf sundew problems before they start
Most roundleaf sundew issues are care-mismatch, not bad luck. Dial in the basics:
Looking for roundleaf sundew in general rather than its problems? Read the full roundleaf sundew care guide — light, water, soil and feeding.
Roundleaf Sundew problems — FAQ
Why is my roundleaf sundew rot during winter?
Standing water on the dormant hibernaculum causes rot. Keep merely damp, not flooded, and ensure airflow over winter.
Why is my roundleaf sundew plant declines after a year indoors?
It needs a real cold dormancy (around 0-10°C for 3-4 months). Without winter chill it weakens and dies; grow it outdoors or in an unheated space.
Why is my roundleaf sundew green, dewless leaves?
Too little light or mineral-laden water. Give full sun and use only rainwater or RO.
Why is my roundleaf sundew leaves blacken in autumn?
Normal dormancy onset, not disease — the rosette is retreating to its hibernaculum. Reduce water and leave it cold.