A good mulch is a must in Dallas in the summer. A mulch preserves moisture in the soil, protects the roots from heat and slows weed growth. Apply several inches of mulch in the later spring and replenish during the season as materials break down. Pine bark, hardwood mulch, pine needles, shredded oak leaves, and similar organic materials are suitable for mulch. Mixtures of these materials are best, as they tend to pack less and permit easy transmission of water and fertilizers.
Nurseries have mulch material if no other source is available.
Principal insects on roses are aphids and thrips. Some recommended sprays are Orthene, Malathion, and Mavrik. Follow label directions carefully and explicitly. Do not spray in hot weather. Spray rose beds after they have been well soaked.