When I had my 10 gallon running with java fern and anubias under low light, I dosed Flourish and that was about it. Followed the directions on the bottle and dosed twice a week, everything seemed fine.
I run a low-mid light tank, and just dose once/week with easy green from aquarium co-op, and every other day with easy carbon. So far, so good! I didn't have much luck with flourish, but the easy green works well for me.