Lavatera trimestris Silver Cup Seeds Ref: TM01401501 SowingSow indoors in late winter/early spring, outdoors in mid spring, setting the seed very shallowly in good seed compost or fine, well raked soil. Germination takes 15-20 days at 21C (70F).GrowingTransplant when large enough to handle or thin out the seedlings to 30cm (12in) apart each way. They prefer ordinary, but not rich soil in sun with a little shelter.Aftercare FloweringSummercroppingPlant typeHardy Annual Price: £1.99 Quantity: