Delphinium grandiflorum Summer Blues Seeds Ref: TM01402909 Sowing Instructions: Sow from late winter to early summer 1.5mm (1/16in) deep in a good seed compost. Make sure the compost is moist but not wet and seal inside a polythene bag until after germination which usually takes 21-30 days at 18-24C (65-75F). Growing Instructions: Transplant when large enough to handle into 7.5cm (3in) pots. Aftercare Instructions: Later plant out 30cm (12in) apart into moist but well drained soil in full sun. Seed sown early will often flower the same season. D. cardinale is a short lived perennial. Caution: Harmful if eaten Price: £2.29 Quantity: