Prior to any transplanting anything, mark the north side of the plant with a string or piece of cloth. After it is dug, place it in the same direction and it will adjust to new surroundings far more rapidly and with greater success than if it is planted in an opposing direction. Additionally, it is unwise to apply fertilizer to newly transplanted specimens. They need time to adjust to new surroundings and must rest a bit before doing much growing. To give fertilizer to a recent transplant is akin to giving a man in ICU a three course dinner… it is not a good idea.
After choosing a new location dig the hole and I have found it must be larger than you think it needs to be… three times the size of the root ball. Make a small mound in the center of the new hole to prevent air pockets from forming as you plant. To enable you to move the transplant easily perhaps give it a good soaking several days before the dig and try to choose an overcast day when rain is predicted.
Dig around the transplant, cutting in a circle. As you dig, lift and probe occasionally to see if the plant is indeed moving and note where roots may still be anchored. Take as much soil as can be lifted so the root system is least disturbed.
For roses, place it slightly higher in the hole as it will settle several inches after planted. The bud system should therefore be an inch above ground level. Point the exposed roots and rootlets outward and add ½ cup of bone meal around the root system. Fill with soil, water well and wriggle to eliminate air pockets, which will bubble up. Lastly prune the spindly growth leaving good strong canes and prepare to enjoy the show later in the season!