Helianthus annuus Claret F1 Seeds - Red Sunflower Seeds Ref: TM01407050 SowingSow March to May thinly, 12mm (½in) deep in drills 30cm (12in) apart in well cultivated soil raked to a fine tilth. Germination usually takes around 21 days. Alternatively, you can sow indoors in late winter/early spring for earlier flowering. Sow individually into 7.5cm (3in) pots at 20-30C (68-86F). When well grown, gradually acclimatise to outdoor conditions before planting out after all risk of frost.GrowingWhen large enough to handle, thin seedlings to 30cm (12in) apart.Aftercare FloweringMid or late Summer to AutumncroppingPlant typeHardy Annual Price: £2.09 Quantity: