Answer: Although container-grown roses can be planted at any time the ground isn't frozen, extreme heat is stressful for the plants. Early spring and fall are the preferred times to plant, but the plants will be better off in the ground where the roots are insulated from the heat. Plant them in the cool of the evening, preferably before a rain shower. Water them in well, keep the soil evenly moist, and apply several inches of organic mulch to help keep the soil moist and cool. Shade them for the first week or two to reduce transplant stress. One idea is to make lean-to's over the plants out of bamboo poles and shade netting.
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