White Powder on Palm: Mealybugs or Mineral Deposits?

Identifying White Residue on Palms

A white powdery substance at the base of stems and on leaf undersides suggests:

• Mealybugs: Soft, cottony, waxy coating; insects visible with magnifier.
• Mineral deposits: Hard, crusty, from hard water or fertilizer salts.

Diagnosis & Treatment

1. Touch it: mealybugs feel cottony; minerals feel gritty.
2. If mealybugs: spray all surfaces with alcohol-soap mix (1:8 alcohol:water + drop soap). Repeat weekly.
3. If minerals: flush soil thoroughly; wipe leaves with damp cloth.

Rosemary Care Bonus

Rosemary needs full sun, excellent drainage, and infrequent watering. Feed lightly in spring. Indoors, it often fails due to low light and overwatering.