Troubleshooting
Cistus-Flowered Sundew problems — and how to fix them
Cistus-Flowered Sundew (Drosera cistiflora) 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.
Tuber rot during dormancy
If any moisture reaches the dormant tuber over summer, it will rot. After growth dies back, cease all watering and leave the pot dry in a warm spot (25–35°C) until autumn. Do not check or disturb the tuber unnecessarily.
Failure to flower
Insufficient winter sunlight is the main cause. Ensure the plant receives at least 6 hours of direct sun. The plant also needs a cool growing season (below 20°C); warm indoor temperatures prevent bud formation.
Fungal stem rot at soil level
Poor drainage or over-humid, stagnant air around the stem causes Botrytis or Pythium. Use the sandy, free-draining mix described, ensure good ventilation, and water from below only.
Prevent cistus-flowered sundew problems before they start
Most cistus-flowered sundew issues are care-mismatch, not bad luck. Dial in the basics:
Looking for cistus-flowered sundew in general rather than its problems? Read the full cistus-flowered sundew care guide — light, water, soil and feeding.
Cistus-Flowered Sundew problems — FAQ
Why is my cistus-flowered sundew tuber rot during dormancy?
If any moisture reaches the dormant tuber over summer, it will rot. After growth dies back, cease all watering and leave the pot dry in a warm spot (25–35°C) until autumn. Do not check or disturb the tuber unnecessarily.
Why is my cistus-flowered sundew failure to flower?
Insufficient winter sunlight is the main cause. Ensure the plant receives at least 6 hours of direct sun. The plant also needs a cool growing season (below 20°C); warm indoor temperatures prevent bud formation.
Why is my cistus-flowered sundew fungal stem rot at soil level?
Poor drainage or over-humid, stagnant air around the stem causes Botrytis or Pythium. Use the sandy, free-draining mix described, ensure good ventilation, and water from below only.