In the early spring, our potted bare root plants can be lightly rooted so can be lightly rooted so can be kept in their pots for a few weeks, or planted out, avoiding frosty or waterlogged conditions taking care not to damage the emerging roots. Plant into well-prepared soil enriched with plenty of organic matter, and like herbaceous peonies, make sure that the highest bud on the crown is no deeper than 5cm (2in) below the soil surface as this will reduce flowering.
In growth, keep well fed and watered, and remove spent flowers after they have faded to promote further blooms. In each subsequent spring, apply a balanced slow-release fertiliser around the base of the plant and lightly mulch with well-rotted compost or manure but not too deeply as this can smother the roots and reduce blooming.
In late autumn the foliage usually falls from the stems like its parent tree peony at which point, cut them back to about 10-15cm (4-6in) from the soil level—or to wherever the stems die back to. Intersectional peonies are deep-rooted, and do not make good plants for containers.