Dig hole twice the diameter of the root-ball and deep enough to place the plant at original growing depth.
Amend the soil from the hole with compost and peat moss so the resulting mix will contain approximately 1/3 of each material. Wet thoroughly.
Turn the pot on the side and tap on it lightly until the plant slips out. Balled and burlapped plants should be left in the burlap.
Using a tool or knife, score vertically down the root-ball 4 or 5 times about 1″ deep. Loosen and rough up circling, matted roots.
Set plant in the hole with backfill soil mix, pressing or tamping lightly to hold plant firmly in place; making sure the top of the root-ball is even with or slightly above surrounding soil level when planting complete.
Water root-ball and surrounding soil thoroughly to settle soil and remove air pockets. For trees or specimen plants, form a berm around the hole using the remaining native soil to aid in watering.
Mulch 2″ deep with bark or straw materials.
Water frequently for the first 4-6 weeks. Adding a root stimulator to the water may reduce the rooting time and shock.
Fertilize with a slow release fertilizer after 4 weeks.