Calathea Fungal Leaf Spot: Remove Leaves, Spray Antifungal, Fix Watering

Your Calathea stopped folding at night (first stress sign), then developed brown/black blotches with yellow halos—classic fungal leaf spot with fruiting centers.

Immediate Action

1. Remove badly infected leaves (never >⅓ of foliage at once).
2. Spray less-damaged leaves weekly with Consan 20 or commercial antifungal until spots gone.
3. Keep leaves dry: Water from bottom (fill tray, let soil absorb 30 min, empty). Stop misting.
4. Check for pests: Spider mites? Use 3-in-1 neem oil spray for both.

Fix Underlying Causes

• Water: Distilled only. Tap water causes brown tips.
• Humidity: Raise after fungus clears (pebble tray, plant grouping).
• Light: Low-medium, no direct sun.

Fungus needs moisture. Dry leaves + bottom watering + antifungal = recovery.