Papaver seeds - somniferum Applegreen Seeds Ref: TM01406972 SowingSow March to April or August to September for overwintering. Optimum Germination Temperature: 60-65F (15-18C). Sowing Depth: 1/16 Inch (1.5mm). Seed should be sown outdoors where it is to flower in spring or autumn and thinned out to 12in (30cm) apart.GrowingSpace the plants 30cm (12in) apart in full sun in ordinary garden soil.Aftercare FloweringSummercroppingPlant typeHardy Annual Price: £2.09 Quantity: