i have tried all kinds of values, and i've found that super p's can cause probs (usually more so in soil than in hydro), as cannabis prefers a higher k than p in flower. hh's hammerhead blew me away, and if i say it's worth the 120$ a gallon, trust me; it is
however, almost all bloom boosters are super p's. these are made for garden veggies like tomatoes and flowers such as roses. not ideal for pot. doesn't mean it won't work, just means it's not the best......