The Q&A Archives: Spraying Roses with Water

Question: How come if you accidentally spray roses with water they suffer for it, and if it rains they do fine? This question has bothered me for some time. Is it the chemicals in our drinking water? What a thought.

Answer: Water in the Southwest contains alot of mineral salts, which can stay on the foliage after the water evaporates and "burn" the foliage. However, spraying roses with water is sometimes recommended by rosarians, for example, to keep them dust-free, because spider mites thrive on dusty plants, or to knock off aphids. Spray early in the morning before the sun heats up. Don't spray in the evening, as the plants don't have time to dry, and the dampness promotes fungal diseases.

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