Filter Foam as Substrate Question

When I first set up a viv I was deciding between filter foam or regular substrate and ended going with Josh's bioactive substrate with filter foam under for drainage. Couple years later I still like that combo, but I am currently setting up 3 new vivs and want to just go with filter foam.

So what's the best way to plant plants in the foam? Are there any plants that won't work? Any tips would be great.