Try mixing two tablespoons of Epsom salts to a gallon of water and add a teaspoon of dishwashing liquid. Water them with that for the next few weeks. Epsom salts helps transplanted plants make feeder roots to take up nutrients, which is why you always put it around plants you transplant into the ground.

I'll try it, I've got a couple bags of epsom salts. I was afraid since the soil already had fertilizer to give them any more nutrients.

Yes, they are that, but I don't think you should put too much fertilizer into them when they are just trying to reacclimate to a new pot. Let them get settled in first. I'd suggest the timed-release and maybe a constant feed of 1/4 strength liquid for awhile until they are looking healthier.

That being said, I had a H. rostrata (lobster claw) that demanded weekly feeding all through the year in z10. If you didn't give it enough water and fertilizer, it would get brown leaf edges. I used to PILE manure around it in the spring and it still wanted more.

I'll try it. I was afraid to over fertilize, as the potting mix already had some. Maybe not enough. Before I divided it, it occasionally got some miracle grow, and seemed happy with that.

Thanks DG - explains why mine look raggedy a lot!