| | Re: Alternanthera Question
I am growing this plant. It is in a 15g tank. I do not use co2 and I use a cfl, I think it is a 23watt. It grows very slowly. Feeding it a bit seems to perk it up but it is still fairly slow. It seems to prefer growing from the axillary buds on the stem. I find that if you lie it down on the substrate rather than pinching it back it seems to do better. I don’t think it likes shading itself either. The bottom leaves just seem to keep falling off.
From one stem I now have about 6 stems growing up toward the surface. You might find that letting grow across the top of the tank will help it to put on the axillary growth. I haven’t tried that.
It does seem to be a very hardy plant. Mine is only about 7 inches tall right now. When it gets to be about 10 inches I will try growing it horizontally on the substrate again. I am not sure it would look very good being any taller anyway but I don’t have anymore headroom in this 15g tank.
Hope that helps.