Delphinium Seeds (Larkspur Seeds ) ajacis Seeds Kingsize Scarlet Ref: TM01407243 SowingSow April to May or September to October. Sow outdoors where they are to flower. Prepare the ground well and rake to a fine tilth before sowing. Sow 3mm (1/8in) deep, in rows 30cm (12in) apart.<p>Alternatively, sow in late summer in 7.5cm (3in) pots in a cool greenhouse and then overwinter plants in cool, well lit conditions. Plant out the following spring after all risk of frost, 30cm (12in) apart in full sun.GrowingWhen large enough to handle, thin out seedlings to 23cm (9in) apart.Aftercare Prefers a light, well drained soil in full sun.FloweringSummercroppingPlant typeHardy Annual Price: £1.69 Quantity: