Posted: 22/06/2014 at 18:41
I am assuming you bought these in pots?
When they die down in Autumn they will have a tuber that looks like a starfish. You need to plant them in a sunny position in free draining soil. They do not like to be sat in a puddle. If you have clay soil add plenty of compost and grit. Try not to break the arms off the starfish. The centre bud will need to be about 4 to 6 inch down. It probably needs a stick to mark the position so you dont stick the fork through it in Spring (My usual trick)
Or you could plant the whole pot full now,into a large hole with grit underneath to aid drainage.