Ageratum Seeds houstonianum Hawaii Mixed F1 Hybrid Ref: TM01407361 SowingSow February to April. Germinate at 20-30C (68-86F) on the surface of a good free draining, damp seed compost. Do not cover the seed. Place in a propagator or seal container inside a polythene bag until after germination which usually takes 7-21 days. Do not exclude light, as this helps germination.GrowingTransplant seedlings when large enough to handle into trays or 7.5cm (3in) pots. Grow on in cooler conditions for 10-15 days before planting out after all risk of frost, 15-23cm (6-9in) apart.Aftercare Prefers a sunny position in any garden soil.FloweringSummer. Remove spent blooms.croppingPlant typeHalf-hardy Annual Price: £2.49 Quantity: