White Crust on Terracotta Orchid Pots: Mineral Deposits from Hard Water

What It Is

White coating on clay pots = mineral salts (calcium, magnesium) from hard water evaporating through porous walls. Harmless to plants.

Management

• Wipe off weekly if aesthetics matter.
• Use rain/distilled water to reduce buildup.
• Many growers accept it as "patina."

No Fungus

It's not a fungus—no treatment needed. Orchids are healthy if blooming yearly.