Cosmos sulphureus Seeds Polidor Ref: TM01403474 SowingGerminate from March to May at 18-20C (64-68F) on the surface of a good free draining, damp seed compost. Apply a layer of compost or vermiculite, 3mm (1/8in) deep. Place in a propagator or seal container inside a polythene bag until after germination which usually takes 5-10 days. Do not exclude light, as this helps germination.GrowingTransplant seedlings, when large enough to handle into 7.5cm (3in) pots. Grow on in cooler conditions for at least 10-15 days before planting out. Plant outside after all risk of frost, 30cm (12in) apart.Aftercare FloweringcroppingPlant typeHalf-hardy Annual Price: £2.09 Quantity: