White Residue on Flytraps and Nepenthes: Perlite Dust, Not Pests

Venus Flytrap with white residue

Diagnosis: Perlite Deposits

The white powdery coating on your flytrap's leaves is almost certainly perlite residue from soil splash during heavy rain or top watering. As the water evaporates, tiny perlite particles dry on the leaf surface.

Solution

Simply wipe it off with a damp cloth or rinse gently with distilled water. It's harmless and purely cosmetic.

Nepenthes White Dots

Could be the same (perlite splash) or something else (mineral deposits, early fungal spores, or even scale insects). A clear photo would allow accurate identification.

Prevention

• Water from the tray (bottom watering) to minimize splash.
• Top-dress pots with live sphagnum or coarse sand to reduce soil splash.
• Use pure water—tap water minerals can leave similar deposits.