i stand by superthrive 100%. i use it for all seedlings and when transplanting. with superthrive i have noticed my seedlings get bigger faster than when i don't feed them with it. i don't know if the question was already answered but the ratio is 1/4 teaspoon per gallon of water. don't feed the plants too much with superthrive. they don't like that. i learned this last year. i feed them with it 3 times within the first 3 weeks of their lives and one more time when they're transplanted.