Yes, look at this link. She grows them in alpine beds. I went there the end of May. Took my breath away. You will get many ideas from her site for your concrete planters.
http://wildgingerfarm.com/
The nice part about the smaller species tulip is that they don't interfere with the other plants. The sedum are just coming out of dormancy when the tulips are blooming. The sedum roots don't seem to bother the sedum or semps.
