It could benefit from spot feeding of zooplankton and phytoplankton, or cyclop-eeze, but I found that good lighting is the best thing for it, more so than spot feeding.
My first frogspawn head was in a 12g nano for 6 months with 36w PC light. I spot fed it once a week. It didn't grow at all. After my first tank upgrade it went into a 55g with 260w PC light. I stopped spot feeding and just put the phyto/zoo in the water once a week and once every couple days I sprinkled in some cyclop-eeze.... I figured this fed all my coral instead of just the frogspawn. After 6 months in that tank it split into 3 heads and had another little head growing out of the base.