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Rose Rust in July: Not Just Spring Disease Anymore

Mini Rose Rust Outbreak in Summer: Identification and Treatment

New rose owner (since April): 3 of 4 mini roses show rust-like symptoms in July. Online says rust = spring. Asks: lookalike diseases? If rust, treatment?

Weather Changed the Rules

Rust = damp/rainy conditions (typically spring)
But weird weather = rust anytime
PNW example: July just getting warm sun, Black Spot rampant
Rust color unique = easy diagnosis
No other rose disease looks like rust

Treatment

Any Black Spot fungicide works on rust
Garden sulfur = organic option
Spray base too (spores fall there)

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