Penstemon Tall Bicolor Sensation Mixed Seeds Ref: TM01408602 SowingSow from late winter to spring in a good seed compost just covering the seed with compost and gently firm down. Germination usually takes 14-21 days at 18C (65F).GrowingIn approx. 4 weeks after germination when seedlings are large enough to handle, transplant and grow on in cooler conditions. Gradually acclimatise to outdoor conditions for 10-15 days before planting out after all risk of frost, 30-45cm (12-18in) apart in a sunny spot on light well drained soil.Aftercare Avoid, wet poorly-drained soils. Although usually treated as an annual, they will overwinter outside if in a sheltered well drained site.FloweringLate SummercroppingPlant typeHardy Perennial DISCONTINUED Price: £1.69 Quantity: