Sowing – Sow outdoors where they are to flower. Prepare the ground well and rake to a fine tilth before sowing. Sow 20mm (3/4in) deep, in rows 30cm (12in) apart.

Growing – When large enough to handle, thin out seedlings to 23cm (9in) apart.

Aftercare – For earlier flowering sow seed, 1cm (1/2in) deep, 3 seeds per 7.5cm (3in) pot, in free draining, damp seed compost. Place at 15-20C (68-77F) until after germination. Gradually acclimatise to outdoor conditions before planting out after risk of frost. Before planting into containers, ensure plants are well rooted in their pots.

Flowers – June to September