Sow on the surface of moist, good quality seed compost (do not cover seed with compost) in a propagator on a windowsill or in a greenhouse at approximately 18-21ºC (65-70ºF). Transfer seedlings when large enough to handle into further trays spacing them 5cm (2") apart, or in individual pots and grow on. Plant outside in late May-June, when frosts have finished, about 40cm (16") apart. Or plant on into a decorative pot for indoor use.
Ideal for beds and borders, patio pots and containers, greenhouses. Attractive to bees. Suitable for cut flowers. Prefers full sun. Feed with a potassium rich feed throughout the summer to enhance blooms.