Plant Problem Lab
Begonia profile

Plant + symptom guide

Begonia brown spots

Brown spots need texture and location checks. Dry window-facing spots, soft spreading lesions, and pest speckling point to different next steps.

For begonia, adjust the diagnosis around this plant profile: Begonias can crisp, spot, or drop leaves from uneven moisture, low humidity, direct sun, or mildew-prone wet foliage. Pattern and leaf texture matter.

Most likely causes

direct sun, heat, or light shockoverwatering or slow-drying soilpest pressuredirect sun or heat scorchwet-soil root stresspests

How to confirm it

Check whether spots are dry and tan, soft and spreading, or tiny and speckled.

Notice whether damage is strongest on the window-facing side.

Inspect undersides and new growth for residue, dots, or webbing.

Check whether spots are dry and sun-facing or soft and spreading.

Avoid letting water sit on fuzzy or textured leaves.

Next steps for Begonia

  1. Step 1

    Move out of harsh direct sun if damage lines up with the window.

  2. Step 2

    Isolate the plant if pest signs appear.

  3. Step 3

    Avoid cutting every spotted leaf until the cause is stable.

Recommended reading

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