I have three sedums in their third year. Last year they got too big for themselves and collapsed outwards, leaving a big hole in the middle. From reading up on them a bit, I think they are in too shady a position. They are also in quite soggy soil. There is one on the opposite side of the garden (the sunny side) and it does a lot better.
This year they are already huge. Should I prune them? If so, how do you do it? Just cut half way down the stem?
And longer term, should I try to split / move them? I do like them when they flower but don't have much room for them on the sunny side.
This should be of help http://www.gardenersworld.com/forum/plants/chelsea-chop/316359.html
Gardening in Central Norfolk on improved gritty moraine over chalk ... free-draining.
Great - thanks all. I will get chopping. They are in the ground, not in pots. Where would vine weevils be, and what would they look like?!