Here is a great way to feed the rose bushes and keep them healthy and promise more blooms.:bl ooming::bl ooming::bl ooming:
Save your food cans. open both ends. Dig a small hole between every two plants or about 1 foot away from every one large plant, In the direction the water would flow to your rose bush. Push the can in the ground with about 1" sticking up. (I leave an inch sticking up so I can find it easier).
Add rose food in the cans and fill with water every time you water. This carries the food straight to the roots of the rose bush and yeah!!! Beautiful roses everytime.