Powdery Mildew on Euonymus: Not a Normal Trait

White Powder = Disease, Not Variety Characteristic

Euonymus 'Aureo-variegata' gets whitish powder annually. Nursery said "occasionally normal." Girlfriend says it disappears in winter (Jan). 3 hrs sun, east wall.

Fact Check

No Euonymus has natural white powder. It's powdery mildew—a fungus blocking photosynthesis, weakening plant. Cool weather (Jan) suppresses it.

Control Program

1. Spring: Spray horticultural oil.
2. Reduce watering—wet foliage favors mildew.
3. If persistent: Apply fungicide (Armicarb 100) in spring.