At the risk of getting off the subject, I will add this tip on sedum that works well in this part of the country. I don't know why it wouldn't work every where.
Only buy a couple, if you have the patience to multiply your own.
In the spring,when sedum gets about 12 inches tall, cut your sedum back by 1/2. This prevents your sedum from flopping over and getting leggy later in the summer. The parts cut off root very easily. I dip in rooting hormone and stick in potting soil in disposable 6 inch pots. I fill those pots full enough to look like one of the pots you bought originally. Maybe 6-8-10 stalks in each pot. I water well, then loosely cover with a small clear plastic bag. Move your pot to a shady, wind protected area and wait a couple of weeks. They will have rooted and then you can plant those pots in the fall. Repeat annually and then you have a garden full. I am not sure the rooting hormone is necessary. I don't think you can kill sedum. I have given many such pots to my neighbors. Ha Ha! It's my plot to spread bee/butterfly friendly plants around the neighborhood!
I'll take a picture of what I am talking about.
