Helianthus annuus Autumn Time Seeds - Sunflower seeds Ref: TM01406299 SowingSow March to May, thinly, 12mm (½ inch) deep in drills 30cm (12 inches) apart in well cultivated soil raked to a fine tilth. Germination usually takes around 21 days.GrowingWhen large enough to handle, thin seedlings to 30cm (12 inches) apart. Alternatively, you can sow indoors in late winter/early spring for earlier flowering. Sow individually into 7.5cm (3 inch) pots at 20-30C (68-86F). When well grown, gradually acclimatise to outdoor conditions before planting out after all risk of frost.Aftercare Prefers a well drained soil in full sun. Flowers mid/late summer to autumn.FloweringSummercroppingPlant typeHardy Annual Price: £1.99 Quantity: