Dianthus seeds - Dianthus barbatus Excelsior Mixed Seeds Ref: TM01402840 SowingSow in late spring/early summer outdoors in a well prepared seed bed. Sow the seeds very thinly 6mm (¼in) in drills 30cm (12in) apart, keep the soil damp until germination takes place and thin out the seedlings 15cm (6in) apart when large enough to handle.GrowingTransplant 30cm (12in) apart into flowering site in the autumn for flowering the following year.Aftercare They will grow in most soils and grow equally well in full sun or part shade.FloweringSpringcroppingPlant typeHardy Biennial Price: £1.49 Quantity: