Named in memory of Margaret Seabrook, wife of the gardening correspondent, Peter Seabrook, this vigorous ground-hugging perennial produces masses of flowers with dark pink centres which slowly fade outwards through lilac to light pink with the outermost flowers appearing almost white.Position: full sun ; Soil: moist, well-drained soil Rate of growth: average Flowering period: June to September Sold in a 1.5 litre pot.