Choose a location in full sun to partial shade, though plants will flower best with at least 6 hours of direct sunlight. The soil should be rich, moisture-retentive, and well-draining - incorporate plenty of well-rotted organic matter if the soil is particularly poor.

Dig planting holes twice as wide as the root ball and at the same depth, spacing plants 45-60cm (18-24in) apart to allow for their mature spread. Position plants at the same level they were growing in their pots, backfill with soil, and firm gently to eliminate air pockets. Water deeply immediately after planting, and apply a 5-7cm (2-3in) layer of mulch around the base, keeping it away from the stems.

During their first growing season, keep soil consistently moist but not waterlogged, watering deeply when the top few cms of soil feel dry. Young plants may need staking until they establish strong root systems, particularly in exposed sites. While established plants are relatively drought-tolerant, newly planted, or divided specimens, will need regular watering until their root systems establish.