I have a bunch of them growing in my emersed setup. It's an adapted 30 gallon acrylic reef setup with a 65 watt power compact. Most plants are grown in pots that sit in a few inches of circulated water (usually from water changes in my aquariums). I have the Anubias growing in between all those with their roots submerged. I add just a little bit of Schults plant fertilizer and Flourish, although I think the former could just be substituted with the same macro nutrients I use in my tanks.
They had been sitting in a bucket at a friend's house for quite a while and were in pretty bad shape. They did, however, recover. Have you given yours enough time? How much humidity do they have? That's all fert wise? More details will help.