Allow flowers to fade and quite often this produces interesting colour changes. But will often self seed
Remove spent flowers to promote continuous flowering. Leave any fresh fall foliage to overwinter. Likes well drained soil. Divide in spring or fall every 4-5 years.1
Sow fresh seed in the autumn and overwinter young plants in a cold frame
Try to aim for a seed spacing of at least 11.9 inches (30.5 cm) and sow at a depth of around 0.25 inches (0.635 cm). Soil temperature should be kept higher than 18°C / 64°F to ensure good germination.By our calculations, you should look at sowing Red Velvet about 49 days before your last frost date.
Enjoys sun or part shade and good drainage
As Red Velvet is hardy, ensure temperatures are mild enough to plant out - wait until after your last frost date to be on the safe side.Yarrow