I've had some Ludwigia repens for a little over a month now that I believe was grown emersed originally (smaller and rougher leaves). Anyway originally the undersides were red with the tops remaining green.
Well now after about 3 trimmings and replanting, the leaves are much more broad but they are for the most part green on both sides. I dose EI daily with a little extra DPTA iron, pressurized co2, and you can see in the photo I use 3x23w 5000k cfl bulbs about 3 inches over my 20 long.
How can I bring out more red in these plants?