I tried them for the first time this year as well. Dug them up just before the onset of the frost and snow and have to say that yields have been encouraging. Next year they will have to be planted in a specially prepared bed double dug as most of my tubers broke when lifting, not that it matters too much. Not yet had time to sit down and eat them but an earlier nibble a few weeks ago from a small root was agreeable in taste.
Pity the flowers are both late arriving and uninspiring as the foliage justifies this plants position in a decorative border or flower garden.
I've still got one growing in a pot in the polytunnel for comparison that is not yet tipped out. If they perform well in large pots this would lead to far more economical use of space on the plot.
