A seed mix from Lord Nelson, that I received as a gift a few years ago and I've sown from at least twice. I have not gotten two identical plants, all have been in different shades of pink, single or double. Sweet Williams are unfortunately not long lived, so they need to be renewed every few years. They tend to flop over if they're not supported, so it's good to give them ample space. They need a sunny spot and well drained, humus-rich soil.