First, dig a hole. The hole should be larger than the rootball of the plant, particularly when planting in tough, clay soils. Doing so allows you to backfill with some good quality compost, too. Once the hole is dug, add a handful of organic fertiliser and water in thoroughly, allowing the moisture to penetrate deep into the surrounding soil. Now you’re ready for planting.
Remove your tree from its pot, inspecting for any forked or wrapped roots. Plants that have been potted for too long generally have these, and it helps to untangle or cut them out if problematic. When you’re happy, plant away, ensuring that as you backfill with the dug out soil and compost that the plant sits perfectly at ground level.
Water in again and then stake it for stability. Even moderate winds can throw young plants about, so until they have a solid footing of roots, they will need some help.