Possibly one of the most popular of all the intersectional peonies, which are a cross between the herbaceous and the tree forms. It has inherited the best qualities of both its parents, so has large, deeply cupped bright yellow flowers over a relatively long period. They appear against a backdrop of lustrous green foliage, which forms a bushy mound, and takes on autumnal tones before it drops in autumn. It's perfect for adding an exotic-looking shot of early summer colour to the border, and shows a good resistance to diseases.
This paeonia has been field grown, however in order to keep the roots hydrated and promote fresh new growth, we have potted them up. Therefore, your plant may not have a well developed root system just yet, so you should not worry if the soil falls away when you are planting it out.
How to care for Paeonia Bartzella:
In the early spring, our potted bare root plants 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 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.