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myGarden.org

Protecting

From begin March to end March    · each 1/2 year

Mulch is very important for roses. While it keeps weeds down, its primary value is to inhibit water evaporation from the soil. Mulch will help maintain soil moisture levels, keeping the soil cooler in the summer when roses are more vulnerable to heat stress. A thick organic mulch freshly spread under the bushes in early spring while the plant is still dormant also reduces fungal disease problems, since fungal spores are often deposited on rose leaves by splashing rain bouncing up off infected soil. Spread two to four inches of some attractive organic material on the soil around the base of each rose bush in the late winter, at least a month before expected last frost. Although the soil around the roses will warm up more slowly, fungal disease problems will be forestalled. 
Use wood chips, shredded bark, pine needles, cottonseed or cocoabean hulls, chopped leaves, ground corncobs or peat nuggets for mulch. The new landscape fabric makes an excellent first layer for mulching around a rose plant. Lay the textile material on the soil first, then cover it with the organic material for a more attractive look. Keep the textile and the organic mulch about two inches away from the main stem of the bushes.