LOVE LOVE LOVE this product and I've used them for aeroponics and SOIL as I have an above ground garden plus flowering plants along the wall on the north side; and herbs; and fruit trees. They have helped new seedlings (green one); fast transition to green growth (brown one) and flowering (pink). Used in my vegetable garden; for flowering plants; gets rid of "yellowing"; keeps plants healthy; helping plants through the AZ winter and yes in my Aeroponics too. Only 2 tsp per gallon and I've used the 3 for a over a year now so they go a long way. LOVE THEM!!!