Re: A New Way to Grow Terrarium Plants
Just out of curiosity, why not put a layer of substrate or clay/substrate rather than just leaf litter on top? Wouldn't you derive all the benefits of the design and still be able to have a wider breadth of planting area? A higher substrate level would allow the pots to serve as drainage with the only risk being that the potted plants would root out horizontally into the main substrate (which you could partially avert by screening them over at the rim). This would work particularly well if you were growing emersed plants with a high water table.
In any case, I'd say Hydrophyte or someone else should do a little mock-up rainforest set up, see how it goes wt respect to substrate humidity etc