Rudbeckia hirta Becky Mixed Ref: TM01402547 SowingSow from late winter to early summer 1.5mm (1/16in) deep in a good seed compost. Make sure it is moist but not wet and seal in a polythene bag, exclude light until after germination which usually takes 10-21 days at 12-15C (55-60F).<p>They can also be sown outdoors in mid spring where they are to flower.GrowingTransplant when large enough to handle into 7.5cm (3in) pots and grow cool. Pinch out the growing points when 7.5cm (3in) high to ensure a bushy habit. Later, plant out 23cm (9in) apart in a rich, well drained soil and full sun.Aftercare FloweringcroppingPlant typeHalf-hardy Annual Price: £1.69 Quantity: