Select a planting site that gets full sun and has well-draining soil. In spring, after the last frost, remove the weeds from the planting site.
Cover the planting site with 2 to 4 inches of compost. Use a tiller to mix the compost into the soil at a depth of 12 inches.
Dig the planting holes into the soil. Make the holes twice as wide and of equal depth as the plants' containers. Space red sedum holes 12 to 18 inches apart.
Remove the red sedum from its container and lower one plant into each hole. Firm the soil around the base of the plant and water until the soil settles.
Lay a 2-inch layer of organic mulch around the base of each plant to maintain moisture. Water at a rate of 1 inch per week, or less if you have sufficient rainfall.
Cut the red sedum back to 1 inch above the soil after the foliage dies in the first winter frost. In the spring, turn a 2-inch layer of compost into the soil around the base of the plant and it will recover.