You already understand the importance of cultivating and the importance of feeding the plants.
Fertilizers
Two of the best foods for roses and easiest to use, are bone dust and dried sheep manure, which you can buy at the seed store. These you may dig into the soil as you cultivate, being sure not to let the fertilizers directly touch the roots.
Enemies of Roses
1. Rose Bugs.
2. Aphids.
3. Rusts and Mildews.
4. Borers and other chewing insects.
There are several different kinds of beetles, called rose bugs, which come up out of the ground where they have spent the winter, just at the time of the most abundant and beautiful blooming.
In the Middle Atlantic States they stay in a place about two weeks.