Insert twiggy prunings early in the season to provide invisible and effective support. Avoid overly wet or waterlogged conditions in winter and apply a thick 5-7cm (2-3in) mulch around the base of the plant in Spring, taking care not to cover the crown.

For best blooms, feed every two weeks during the growing season with a high-potash fertiliser. Cut back old stems to ground level in late winter new growth emerges. These plants may need winter protection in colder regions - a dry mulch of straw or fleece will protect the crown. Remove spent blooms regularly to extend the flowering period well into autumn.