An expert rosarian offers advice on how to block or minimize powdery mildew, black spot, rust and more in San Diego gardens.
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British gardeners urged to follow '11am watering rule' or risk roses being ravaged by spring disease and pests
Across the UK, rose lovers are being warned that watering at the wrong time this spring could invite black spot and pests. A new ‘11am rule’ hints at a simple change that transforms their chances.
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