Can i split this plant? My husband says we cant but i thought you could split...
Yes, you can split it. Tall sedums like this are best split in the spring before they start getting tall, but you could do it at any time as long as you keep it watered. Sedums don't need a lot of water, so you have to be careful to give them enough to recover from the shock without drowning them. They will be floppy. Here is something on dividing plants that includes tall sedums: http://www.clemson.edu/extension/hgic/plants/landscape/flowers/hgic1150.html
Great answer Terri!
FYI - Here is also an excellent publication called "Dividing Perennials" to help with future questions you may have about specific perennials and whether you and when / how to divide them: http://www.extension.umn.edu/garden/landscaping/implement/DividingPerennials.htm
Bets of luck and thanks for contacting Ask an Expert!