This is one of the best hardyfor the sunny garden, filling in the gap when the peonies and early perennials are over and the late perennials are not yet in their prime. A bushy plant up to 3 feet (90 cm) high, it is covered with trumpet for many weeks from midsummer. One of the best varieties is ‘Loveliness’, with satiny rose-pink ; ‘Silver Cup’ is pink with a silver gleam; ‘Mont Blanc’, a shorter plant with pure white flowers, is perhaps the best of all. The pink ones need careful placing.
They look well among peony foliage with shrub roses in the background, and there might be a group of purple-leaved plants in front, such asmaximum ‘Atro-purpureum’, or the silver-leaved Stochys olympica. Alternatively, them among evergreen shrubs such as x burkwoodii to cheer them up after they have flowered.
Theare best sown in spring where they are to flower, and they are nice large , so you can see what you are doing. Any garden soil suits them. Thin them when the are large enough, and water if necessary. Deadhead the plants from time to time if you have the patience, but leave a few seedheads to themselves for an early crop next year.