Superthrive is an amazing and very concentrated vitamin tonic for plants designed to promote a healthy root system and overall vigour. It is best used throughout the growth stage of plants and prior to bud formation. Superthrive creates a healthy plant from the roots up, it helps alleviate transplant shock as well as stress caused by over or under watering. Seaton Hydroponics – Adelaide's premier hydro shop now online!!! Everything hydro for you at Seaton Hydroponics (08) 8268 2636 Located in South Australia.