When planting roses from May through to August, dig a hole slightly wider and deeper than the pot, add half a handful of blood and bone in the bottom of the hole. 

Place your rose into the hole with a good margin between the graft or crown of the rose (where the branches are growing from) and the top of the soil to allow room to apply mulch over the soil. You want to make sure there is good air flow around the crown of the rose to help reduce disease later.

Press the soil down firmly around the rose with your hands, do not use your feet to press down hand pressure will be enough. Water the rose in with a seaweed tonic to reduce transplant shock and help the rose to stand up to any harsh frosts. 

Apply your mulch (compost or pea straw etc) and sit back and wait for spring growth.