Camellia Oedema: Water Blisters, Not Disease

Rust-Colored Spots on Camellia Leaves—Underside Then Top

Newly transplanted camellia shows small oval/circular rust spots, mostly underside. Matches oedema (edema)—physiological, not pathogenic.

Cause

Excess water in leaves + high humidity → cell pressure bursts epidermal cells → corky, rust-colored blisters.

Outcome

• Harmless—does not spread or weaken plant.
• Cannot be “cured” on affected leaves.
• New growth will be normal if watering/humidity managed.

Management

• Avoid overhead watering.
• Improve air circulation.
• Water at soil level, morning only.

pH may be off for new transplants, but oedema is a water management issue.