np, i do wonder when should i use superthrive too. my plants are 24days old, dwc hydro and i just switch to GH FLora series nute so i wanna see how this nute work then add superthrive. altho i have one plant in soil and it have about 6leaves now i use a 32oz spray bottle and i added 1drop of superthrive then spray the soil really moist but i didnt notice any different so i added 3 more drop to my sprayer. and sprayed the leaves and wet the soil again. goodluck man.