It's not that expensive. And SuperThrive's sole purpose isn't just to relieve stress on a plant, it can even feminize a plant, insuring you have a female when it's time to flower. I've had up to five plants at a time that I germinated from seed with SuperThrive, even gave it to them during their feedings. I flushed the soil a week before I decided it would be time to flower. When it came time for each plant to show it's sex, all five were female.