So I've had ammania bonsai for around 4-6 months now and I'm not seeing much growth. In this time they have only grown maybe 4 inches. This is my first time with this plant so I don't know if this is normal growth for them. I see pictures online of people with 10 inch stems of it but mine just aren't growing tall. Can anyone that's grown this before tell me how it grew for you and in what conditions did you grow it?
Lighting: 2 13w par38 5000k led
Substrate: organic potting soil capped with black diamond
Filter: not sure of brand. 10-20 gallon hob
Fish: male betta