Why does my anthurium have brown spots on the leaves?

What's likely going on

From the photos, this looks like an anthurium. The leaves show brown, dry patches with a lighter yellow edge.

A few common things cause this pattern:

1. Leaf burn (sun or heat) – If the plant gets a streak of strong sun through a window, or is close to a hot light or heater, the leaf tissue can literally cook, turning tan/brown with a pale edge.
2. Water damage + infection – When water sits on leaves (especially in warm, still air), fungi or bacteria can enter. This often makes round or irregular brown spots with a yellow halo. Spots usually spread slowly to other leaves.
3. Old leaves or mechanical damage – A bumped, folded, or bruised leaf can later die back in that area and look brown, but it won’t keep spreading.

Without seeing the whole setup (light, watering, airflow), it’s usually a mix of minor burn and some leaf-spot organisms that love wet leaves.

What to do

1. Remove damaged leaves
   Cut off the worst affected leaves with clean scissors, leaving a small stub rather than cutting into the main stem.
2. Keep leaves dry
   Water the soil, not the foliage. Avoid misting directly onto the leaves, especially at night.
3. Adjust light and heat
   Give bright, indirect light. If strong sun hits the leaves for hours, move the plant a bit back or use a sheer curtain.
4. Improve airflow
   Space it from other plants and, if indoors, a gentle fan on low nearby can help leaves dry faster.
5. Watch new growth
   If fresh leaves come in clean and no new spots appear, you’ve solved it. If spots keep increasing, consider a gentle copper-based fungicide, used exactly as labeled (keep away from kids and pets until dry).

How to prevent it

• Water when the top 2–3 cm of soil are dry; don’t let the pot sit in water.
• Avoid sudden blasts of hot sun on leaves.
• Don’t crowd plants; good airflow keeps leaves healthier.
• Wipe dust off leaves occasionally with a damp cloth, then dry them.

When to worry

• Spots spread rapidly to many leaves within a week or two.
• Stems turn mushy, or the plant starts to collapse.
• There’s a bad smell from the pot or black, wet-looking areas.

If any of that happens, isolate the plant from others and treat as a serious fungal/bacterial issue or consult a local plant shop or extension service with close-up photos of new spots.