Lavatera Seeds trimestris Seeds mixed - Mixed lavatera seeds Ref: TM01406132 SowingSow from late autumn to early spring 1.5mm (1/16in) deep in John Innes Seed Compost. Make sure that the compost is moist but not wet and seal in a polythene bag until after germination which usually takes 15-21 days at 21C (70F). They can also be sown outdoors in spring where they are to flower.GrowingTransplant when large enough to handle into 8cm (3in) pots. Grow cool and later plant out 40cm (18in) apart into an ordinary but not rich soil in sun and some shelter.Aftercare FloweringSummercroppingPlant typeHardy Annual Price: £1.99 Quantity: