Orchid Leaves Turning Brown: Insects, Watering Timing, or Bacterial Rot?

Progressive Leaf Loss: Not Normal Aging

One bottom leaf browning could be natural aging. But three leaves sequentially? Something's wrong. The pattern suggests an active problem requiring investigation.

Three Primary Suspects

1. Insect Infestation: Check leaf undersides for white fuzzy spots (mealybugs) or brown/white bumps (scale). Treat with alcohol wipes and monitor weekly.

2. Water Timing: Watering late afternoon/evening leaves moisture in leaf bases overnight—perfect for fungal growth. Water mornings only.

3. Bacterial Infection: Darkening, expanding areas at leaf bases indicate bacterial rot—often fatal. No effective treatment once systemic.

Diagnostic Steps

Identify your orchid type for specific care. Meanwhile, switch to morning watering, inspect for insects, and monitor leaf bases for spreading darkness.