Why do I love Sedums for the outdoors? For one, they are one of the few succulent genera that includes species hardy here in USDA Zone 5. For another, despite being succulents, they don't seem to object to my rather dense clay soil. They've held on and come back strong, despite the fact that we have had some wet summers over the last five years, one or two of them extremely so. They provide flowers in the early summer, and colorful foliage interest throughout the growing season. They are easy to grow from seed. I can also pick them up reasonably cheaply, if I look among the groundcovers, rather than the perennials, at the nursery.
First, a look at some of the varieties I grow:
And to get an idea of where I grow them, here are some views of the bed along the sidewalk in front of my house, which they share with Salvia, Artemisia and Juniperus, among other plants.
The Pi bed, facing west. The stones, which are somewhat obscured with foliage, are arranged in the form the Greek letter π (pi.) Mathematics was my husband's field of study, and he has a great affinity for π, enough that he has posted on various internet forums as "BobPi." The large green mounds are Sedum kamtschaticum.
Another nice thing about Sedums is that there are plenty of low-growing forms to choose from, all the better for a bed near the sidewalk. Low-growing plants don't obstruct the view of the rest of the garden from the street.