Answer: Based on your description the plant sounds well established and healthy enough to bloom so I am not certain why it is not performing. Sometimes plants are pushed into early growth at the nursery so they are larger sized earlier than normal; if this was done it is possible the bloom stage was past before you purchased the plants. If the plants are in less than full sun all day long, they may be delayed in their blooming. They may have bloomed a bit and you missed noticing it. Another possibility is that you have a different type of spreading sedum. The dragon's blood usually has somewhat reddish foliage and is well under six inches tall which doesn't really match your description. Sedums are a nice group of plants, so you may be in for a treat when they finally do bloom.
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