Penstemon x hybrida Lilac Frost Seeds Ref: TM01408526 SowingSow February to April. Place seed on the surface of a good free draining, damp, seed compost. Cover with a very fine sprinkling of compost or vermiculite. Seal container inside a polythene bag and place at 15-20C (59-68F). Germination can take 1 to 6 months, but is often quicker. Do not exclude light, as this helps germination.GrowingTransplant seedlings when large enough to handle into pots. Grow on in cooler conditions for 10 to 15 days before planting out after risk of frost, 60cm (24 inches) apart. Plants will prove hardy if wet winter conditions are avoided.Aftercare FloweringSummercroppingPlant typeHardy Perennial Price: £1.99 Quantity: