Roses are an excellent choice for Tucson’s relatively dry climate. However they do like a more acid soil than occurs naturally in Tucson. The solution: grow them in containers with quality soils like ‘Black Gold’ and the FoxFarm Ocean Forest Potting Soil. They do well in the ground if peat moss or a high quality composted mulch like the Master Nursery Bumper Crop is added to the existing soil, along with soil sulfur. They also love Tony’s Earth’s Original Organics fertilizer. Issues with powdery mildew and black sport occur with far less frequency than they do in other parts of the country.
Having trouble growing roses in the full sun in Tucson? Just follow the recommendations mentioned in the paragraph above and add water. Water daily for container roses, and about twice a week for well-established roses in the ground. Use of a coarse coconut mulch topper helps hold the moisture also.