Set plants 12 to 18 inches apart. Choose a sunny or lightly shaded location (many varieties, including the pastels, prefer partial shade as they tend to fade in direct sun), and in soil that is well-drained and moisture-retentive – but not likely to become waterlogged.
Water well during periods of drought; we also recom mend a summer mulch to conserve moisture. Annual applications of a fertilizer high in phosphates are also recommended. If slugs pose a problem, apply slug bait around the crowns just before or as shoots begin to emerge. Cut flower stems after blooming. Divide reblooming types every 2 years.