D. slackii is now boots up...P. laueana is a solitary plant in the container. It flowered a very nice reddish flower but was not able to get a good picture of it, alas. Thanks for your kind words, E, much appreciated!
Say Joseph, you might want to repot the P. laueana into fresh medium. Use the same pot but ditch the medium. Also too, dip that pot in a mild bleach solution of some sort before you add new medium and replant it. Other than that, your plants look remarkably good. Those seedlings are quite impressive for first year growth. Way to go!
E, I am having a senior moment, will have to figure out which ones have flowered and have since croaked...I know the D. madagascarensis flowered up for me. This will be the first D. capensis flowers for me.