I'm convinced the use of Superthrive helped me trasplant my first grow into bigger pots without them going into shock or get stunted.

If you get some and can afford it, buy one of the bigger bottles as it's a rip off on the little 4 oz size...

Some only give it a few drops each watering... I use 1/4 teaspoon per 1 1/4 gallons of water.