With warm, rainy showers in April, black spot disease is likely to make an unwelcome appearance on roses. However, there is a clever way to keep your plants healthy and free of the fungal disease ...

The spotted yellow leaves are the result of black spot disease. Knock Out roses, in general, are quite resistant (not immune) ...

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According to Kevin Lee Jacobs, an experienced gardener and creator of A Garden for the House, cow's milk can be used if your roses fall victim to black spot disease. He said: "A spray composed of ...

Roses affected by the disease are unlikely to ... "smartest" method to tackle it using cow's milk. Kevin explained: "A spray composed of one part milk and two parts water is the best answer ...