Choose a sunny, well-drained spot, as these plants thrive in full sun and free-draining soil. Before planting, soak the bare roots in water for a few hours to rehydrate them. Dig a hole deep and wide enough to accommodate the roots without bending them, spacing multiple plants 20–30cm (8-12in) apart.
Position the crown just below the soil surface for deciduous cultivars. Backfill with soil, firm gently, and water well. Keep well-watered during the growing season, applying a balanced liquid fertiliser each month from spring until the plant flowers.
Towards the end of September cut back on the watering and feeding to allow the foliage to toughen up, and in cold, exposed areas protect the crown of the plant with a deep, dry winter mulch.