Why Your Drosera aliciae Isn't Producing Dew: Light and Temperature Factors

A Drosera aliciae in a terrarium under high-output fluorescent lights (16–18 hours, 5–8 inches away) grew red leaves but produced no dew.

Light Is Adequate

Red new growth indicates sufficient light for photosynthesis (dew is a photosynthetic product).

Temperature Is Likely the Culprit

• D. aliciae is a South African mountain species preferring 70s°F days and 50s–60s°F nights.
• Temperatures above 80°F suppress dew production.
• Fluorescent lights generate heat; a terrarium traps it.

Adjustments

1. Remove from terrarium; place in a sunny south window or increase light distance to 6–8 inches.
2. Reduce photoperiod to 12–14 hours.
3. Monitor temperature; aim for mid-70s day / low-60s night.

Dew should return in a few weeks. Repotting is a last resort and will further stress the plant.