Apple Cactus Mottled Beige After Rain: Sunburn from Sudden South Exposure

5-Ft Apple Cactus Moved from North Indoor to South Balcony, Heavy Rain, Then Beige Mottling

Owner scrapes beige to find green underneath. Asks cause, fix, prevention.

Greg: likely sunburn. Cacti not grown in full sun burn. Even full-sun plants burn if N/S orientation changes. Not fungus. Send photo if unsure.

Cactus: Apple Leaf Hairy Structures: Cedar-Apple Rust Aecial Stage; Cedar-Apple Rust and Fruit Safety: Edible with Spot Removal; White Mold on Cactus Soil: Repotting and Drainage Fixes; Treating Powdery Mildew on Apple Seedlings; Rescuing a Stress-Damaged Columnar Cactus After Relocation; Treating White Fungus-Like Growth on a Paddle Cactus; Rescuing a Freeze-Damaged Peruvian Apple Cactus in Austin; Pruning Peruvian Apple Cactus: Scars, Timing, and Regrowth Reality; Texas Cactus Floodlight Sunburn: Orientation Matters; Treating White Fungus or Mealybugs on Large Cacti

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