Water the plant in its pot thoroughly before planting. Prepare the planting area by digging a hole twice the size of the pot. Dig compost into the base of the hole try adding some slow release fertiliser. Remove the pot and position the plant in the hole, with the top of the rootball about level with the surrounding soil. Refill the planting hole with a mixture of garden soil and compost, firming as you go. Water in well and make sure of a good water supply throught the growing season.