Worked into the surface of the soil they'll start the activity needed to feed your roses. Work your soil so it is loose, add as much organic material as you can get you hands on. After the bed has been allowed to sit for awhile and mellow, I then plant my roses. Liquids Infants eat liquids first, then move on to solids. The easiest of these is alfalfa tea , made with the unsweetened alfalfa pellets available at most feed stores.
Manure tea is another good food additive for the rose beds.
The advantage of the liquid is that the minerals and organics in it are already dissolved or finely suspended as microscopic particles. The soil organisms can start working on them right away, and some of the inorganics dissolved in the brew can readily be absorbed by growing rose roots. A little brew poured around each rose bush starts the chain reaction of converting fertilizer into useable feed for your roses. Solid Food Moving to solid food is the next step. A top dressing of manure and mulch on your spring rose beds provides a warm blanket that will slowly break down and be incorporated by those actively growing micro-organisms you have stimulated.