Drosera binata Losing Tentacles and Spider Mite Treatment

Why Did My Drosera binata Lose All Tentacles?

A Drosera binata (single-fork form) lost all tentacles and dew after being kept in a west-facing window with 4 hours of sun. The grower considered 80°F "cool," but the window likely exceeded 100°F, causing severe leaf damage.

Causes of Tentacle Loss

• Heat stress: West windows can overheat, especially in summer. Tropical sundews rarely experience such temperatures in nature.
• Dehydration: Even brief soil drying causes irreversible leaf wilt.
• Pests: Spider mites cause similar symptoms; check for fine webbing.

Recovery Steps

1. Move to bright light with temperatures below 90°F.
2. Keep soil constantly wet with mineral-free water.
3. Inspect for spider mites; if found, treat immediately.
4. Wait for new growth—damaged leaves won't recover.

Spider Mite Treatment

For spider mites on Nepenthes and other plants, use a permethrin-based insecticide or Bayer 3-in-1 Rose Spray (contains a miticide and fungicide). Follow label directions. Nepenthes tolerate it well.

Pinguicula moctezumae Sunburn

A follow-up revealed a Pinguicula moctezumae placed in direct morning sun (8 AM–12 PM) turned white and dried. Mexican butterworts grow in dappled shade; they cannot handle full outdoor sun. Indoors, a partly sunny window works because glass filters UV. Reduce light and heat; the plant may be dead.

— Jeff Dallas & Jacob Farin, Sarracenia Northwest