Adelae (for me) grows great in 50/50 peat/perlite or LFS. I can not comment on Regia as I have not grown it yet. My Adelae gets bright indirect sun or bright florescent light and are in water trays. They get fed once a month during the growing season (Spring-fall) VERY LIGHTLY with crushed tropical fish food. A very little amount on one or two leaves per plant.