It looks like it is getting some shade from an evergreen tree (pine?). What kind of soil is it? If clay add compost and chicken grit or pea gravel. They should love that area. Some of the sedum love full sun, as in Angelina, Blue Spruce and some of the lower ground covers. There are some that like afternoon shade. I have some semps that will take full sun, but do prefer to have some after noon shade so I use shade cloth in the hottest part of summer. Then after you plant the semps cover the ground with pea gravel as a top dressing, that will also help to retain some moisture in summer. That area will make an awesome alpine garden. Can't wait to see it when you get it all planted, the large rocks are awesome. : )
Here is a link for some really great ideas.
http://www.google.com/search?q...
