Ron Determann at the Atlanta Botanical Garden told me the key to adelae is drainage. I changed my mix to LFS/perlite (it's your plant actually, Paul), 6" square pot, still in a water tray but sit maybe 3-4" above the water line, and they are doing much better.
Last edited by theplantman; 07-27-2014 at 02:16 PM.
They do grow in dense shade in the wild, but many populatons also grow on water falls and rock faces in full sun all day, I have a few growing in my bog garden amongst D.petiolaris and sarras (full sun all day) and they do great, peat/sand mix and a water level of 1-2cm below the soil to 1cm over.
In these conditions they spread via roots like fire, but I also have some in a pot with coco husk and peat, no water tray, watered by rain (so they get pretty dry) and no full sun.