I sowed them last spring, and Di, the first lot of seeds were a complete no show, so I bought (shock horror) brand new seed, and the lot came up very quickly, but by then it was late spring so much warmer. I molycoddled them in pots for a while, until I had the space on the plot, and didn't plant them in their permanent position until early autumn. They overwintered doing nothing and I thought I had lost a couple, but them came back with avengance and have really put on heaps of growth in a very short while. That flower, and the 6 little ones coming up the sides, have all started growing literally in the last couple of weeks! I think they really need a year to get going, but I may be wrong....