Quick diagnosis: location and color
| What you see | Most likely cause |
|---|---|
| Dark brown to black spots spreading from the middle of the leaf or along veins, mostly lower leaves, wet soil | Root rot |
| Lighter tan-brown spots with irregular edges and yellowing around them, hits new growth hardest, leaves dropping | Bacterial leaf spot |
| Bleached tan-to-brown patches on top of the leaf, sun-facing side only, sharp edges | Sunscorch |
| Crispy brown edges and tips working inward, soil bone-dry, leaf curling | Underwatering / dry air |
1. Root rot: dark spots from the center
The most common and most dangerous cause. Fiddle leaf figs hate sitting in wet soil; suffocating roots die, and the damage shows up as dark brown or black blotches that start near the midrib or veins and spread outward — usually on the lower, older leaves first, often several leaves at once.
Confirm it: the soil is still damp days after watering, the pot smells sour, and unpotted roots are brown and mushy instead of firm and tan.
Fix: Unpot, trim every rotten root, cut off the worst-spotted leaves, and repot into fresh, fast-draining mix in a pot with drainage. Then water only when the top 5 cm is dry — for most homes that’s every 7–10 days. Full walkthrough in the root rot rescue guide, and if you’re unsure which watering mistake you’re making, see overwatering vs underwatering.
2. Bacterial leaf spot: spreading tan spots with yellow halos
Bacterial spot looks like root rot’s lighter-colored cousin: tan to medium-brown lesions with ragged, irregular margins and a yellow halo of dying tissue around each spot. The distinguishing tell — it attacks new growth as hard as old, whereas root rot concentrates on lower leaves. Affected leaves often drop quickly.
Fix: There’s no cure for infected tissue, so act like a surgeon: remove every spotted leaf (yes, even if that’s many), stop misting, keep water off the foliage, improve airflow, and give the plant as much bright indirect light as you can. If more than half the leaves are infected, repotting into fresh soil and cutting back hard gives the best odds.
3. Sunscorch: bleached patches on the sun side
Fiddle leaf figs love bright light but burn in harsh direct sun they weren’t acclimated to. Scorch shows as light tan, sometimes reddish-brown, crisp patches on the upper surface of leaves facing the window — never on shaded leaves. Common after moving the plant outdoors or right up against summer glass.
Fix: Pull the plant back from direct sun or filter it with a sheer curtain. Trim badly burned leaves. If you want it in more sun, acclimate over 2–3 weeks with gradually longer exposure.
4. Dryness: brown edges working inward
Underwatering and dry air brown a fiddle leaf’s leaf from the outside in — crispy margins and tips rather than interior spots, often with curling and eventually leaf drop. The pot feels light and the soil pulls away from its walls. This is the same mechanism behind brown tips on any houseplant.
Fix: Water thoroughly until it drains, then keep the schedule consistent — fiddle leaf figs resent drought-flood cycles more than most plants. Keep humidity above about 40% and away from heating vents.
Rot, bacteria or burn? One photo settles it
These four problems get misdiagnosed constantly — and the wrong fix (more water for rot, less for thirst) makes things worse. Scan the spotted leaf with FloraCure and the AI identifies the cause with a confidence score, rates the severity, and gives a treatment plan with specific products. A watering reminder then keeps your fig on the steady schedule it demands.
Coming soon to Google Play →Prevent brown spots coming back
- Water only when the top 5 cm of soil is dry, and always let excess drain fully.
- Use a chunky, fast-draining mix — never let the pot sit in a full saucer.
- Give bright, indirect light near an east or filtered south window; acclimate to any brighter spot.
- Keep water off the leaves and don’t mist — wet foliage invites bacterial spot.
- Don’t move it around: fiddle leaf figs spot and drop leaves from stress alone.
