10,000,000 times over and over .. its just like anything else , lights out go nite nite,no food when u sleep do u eat? nope. so on that note the answer is as always stated over n over feed early in the mornings witch means when the light comes on give them breakfast. unlike hydro or coco. they get water constantly over a spread of the day due to the drainage. soil has moisture in it all day hydro,coco has no way to hold water hints faster growth due to root oxidation,you only get that when soil dries out completely. hope this helps