Planting Container-Grown Roses
Plant container roses during any part of the growing season.
Before you plant a container-grown rose, gradually reduce its water (a process called hardening off) for a week. But on the day you plant, make sure the container soil (and the soil in the planting hole) is moist. Reducing its water beforehand will help prepare the rose for the transplant, and watering at planting time will help keep the root ball together and reduce stress caused by the surrounding dry ground soil absorbing moisture away from the roots.
1. Remove the bottom: Lay the container on its side. Cut off the base of the compressed fiber pot with a small saw. Try not to damage any of the roots.