Centaurea seeds (Cornflower seeds ) cyanus Dwarf Blue Midget Seeds Ref: TM01407164 SowingOptimum Germination Temperature: 65-70F (18-20C). Sowing Depth: ¼in (6mm). Sowing Time: Sow March to April or August to September for overwintering. The seed should be sown outdoors where it is to flower in spring or autumn and thinned out to 12in (30cm) apart.<p>Sown in the late summer/early autumn to produce even better plants for flowering next summer, and final thinning should be left until the spring so that the plants are about 45cm (18in) apart.GrowingSpace the plants 30cm (12in) apart in full sun in ordinary garden soil.Aftercare FloweringSummercroppingPlant typeHardy Annual Price: £1.69 Quantity: