A bushy half hardy perennial in the UK, grows to around 600mm high and flowers from July onwards.
Plant out 300mm apart in May, when all fear of frosts have passed.
They prefer a warm sunny location in light, well drained soil.
Dead head regularly to encourage repeat flowering.
Cut old stems down to ground level in October.
Use cloches to protect the plants from excessive dampness in winter.
To flower under glass from April to July, grow three plants to a 150mm diameter of John Innes No1 potting compost (or similar)
Maintain a winter temperature of 7*C (45*F) and water sparingly.
Sow seeds under glass in March at a temperature of 18*C(64*F).
Prick out the seedlings into boxes/trays/cells, and harden off in a cold frame before planting out after all risk of frost has passed.