Other websites say that this is a difficult plant. I have a few stems of it in my 46 gallon tank with 2 39 watt T5HO bulbs. For the past few months, life has gotten into the way and the tank was rather neglected, with no ferts at all. This plant still grew, albeit a bit slower. It stayed red, but the leaves became narrower. Usually the sides of the stems have a lot of sideshoots.
I just got this plant a couple of days ago and it seems to be doing fine in my tank, PH a little above 7, 2x54 watt T5's, 55 gallon tank with homemade co2 and excel, I've had it about 5 days and it already is showing lots of new growth, I'll write an update in a couple of months.
For me this plant along with "Ammania" are harder to grow than pogostemon stellatus. I have 3WPG, 30ppm Co2, 1.4DKH 6.6pH 2.8GH eco-complete and AquaVitro liquid ferts and it is growing, but very slowly, I believe you need to have very acidic soil and soft acidic water-which I have, but my substrate may need to be more acidic and possibly shoot for 3.5-4.0WPG T5HO. My tank is a standard US 55 Gallon Long. I hope it keeps growing. Try aquasoil or adding peat to help the substrate become acidic.