I am using it at 1/4 the recommended dose and about once a week. I know that's a lot, but they really like it. When I skip a week, I can see them slowing down or the pitchers not growing as tall. I use foliar spray and for the larger one, I also feed them in the pitchers. It's a combinaison of light 24/7, warm (82 to 84F) and constant humidity (75%) so they absorb well the high level of CO2 that is in my house. There is always around 1000ppm of CO2 in my house, winter and summer. In winter we don't open up much because of the cold, and in summer it's the opposite, the AC is ON most of the time.