Sunflower Seeds - Helianthus annuus Sunspot Seeds Ref: TM01406397 SowingSow early spring to early summer outdoors where they are to flower. Prepare the ground well and rake to a fine tilth before sowing. Sow 12mm (½in) deep in rows 30cm (12in) apart. Germination usually takes around 21 days. The seed can also be sown indoors in early spring for earlier flowers. Sow the seed individually in 7.5cm (3in) pots. Germination takes 1-2 weeks at 20C (70F).GrowingWhen large enough to handle, thin out the seedlings to 30cm (12in) apart. For indoor sowing, gradually acclimatise to outdoor conditions for 10-15 days before planting out after all risk of frost has gone.Aftercare They prefer a sunny open site but will grow in most soils.FloweringSummercroppingPlant typeHardy Annual Price: £1.99 Quantity: