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A floriferous plant generally grown as a half hardy annual in the UK, the flowers appear from mid August, and continue on until the first frosts.
They require a soil that is not too rich in nutrients, rich soils tend to encourage leaf growth at the expense of flowers.
Most varieties require some sort of support e.g. stakes, and require deadheading regularly to promote continuous flowering.
Week 14; Sow seeds in pots/trays of seed compost and germinate at a temperature of 18°-21°C (64°-70°F)
Germination normally takes three or four days.
Week 16; Prick out plants into 70mm (3") pots of potting compost and gradually harden them off in a coldframe.
Week 22; Plant them out 600mm (24") apart in full sun or dappled shade.
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