Me too! I want my mushrooms to multiply and cover rocks and they just sit there -for years. I just got 2 test acros to see if I can make them happy, so far one is growing (covered a break in 1 week) and the other isn't declining, so I consider that a success. Monti's, Stylo, Birdsnest all thrive.Easiest: Zoa, Euphyllia
Hardest: Xenia, Mushroom
I took the liberty to interpret "grow" as spreading and growing in #. My discosoma grew from 1/8in hitchhiker to 3 inch without any babies and xenia patch is staying the same size for almost an year in one of my tanks.
Everything else grows like weed including acros