Why Is My Cactus Turning White? Uncover the Causes Posted on September 5, 2025April 18, 2026 By Maggie Poissant No Comments on Why Is My Cactus Turning White? Uncover the Causes Cactus Is your cactus losing its vibrant green and turning white? Don’t panic! This often signals sunburn, overwatering, or even pests, but with a few simple adjustments, you can help your prickly pal recover its health and color.