Rob of Our French Garden points out in the comments below that when the sedums are blooming you can take leaf cuttings without losing the blooms.
Here's all you have to do to get the sedum leaves to root:
Gently peel off a leaf from the stem of the sedum and try to retain a little bit of the stem on the end of the leaf.
- Treat the cutting with rooting hormone.
- Place the leaf in moist sand.
- Wait a week or two and check for roots.
- If they root pot them up, if they haven't wait a little longer. Some of them may root faster than others. If a few don't root and others have you can retreat them with rooting hormone and give them some more time.
Now here's why I did leaf cuttings as opposed to stem cuttings:
4 'Autumn Joy' sedums and 8 unknown sedums!
There were several 'Autumn Joy' sedums that did not root. I put those back in the sand container to give them more time. It's amazing how many plants you can make in such a small container.
Now where can I put all of my new sedums?