[header] How to maintain roses [title] Water roses twice a week, soaking the entire root base. [step] Rose roots run deeply, so make sure you get all of the ground around the roses nice and drenched. Roses tend to do best with up to 90 inches (229 cm) of water a year, but they don't like being constantly wet. 
A good drenching in the summer months 1-2 times a week should be perfect. [substeps] Consider getting a soaker hose, which slowly lets water into the soil to drench down to the deepest roots.