Sow in trays of good quality, moist seed compost, 3mm (1/8") deep, in a propagator on a windowsill or in a greenhouse at approximately 18-21ºC (65-70ºF). For best results chill the seed in air tight plastic bags in a fridge for 2-3 weeks before sowing. Transfer seedlings when large enough to handle into further trays spacing them 5cm (2") apart and grow on. Plant outside in late May-June, when frosts have finished, about 40cm (16") apart. Sow in August-September & overwinter undercover for earlier flowers the following year.
Ideal for beds and borders, patio pots and containers. Attractive to butterflies, bees and birds. Suitable for cutting and dried flowers. Prefes full sun.