1) Agricultural chemical
Found on
https://www.crosswordclues.com/clue/superthrive
SUPERthrive is a liquid concentrated growth enhancer product for plants, which has been available since 1940. It contains `.09% vitamin B1, .048% 1-Naphthyl acetic acid`, plus over 50 secret proprietary ingredients that the company does not disclose. The packaging says that it should be included in the normal fertilizing program to improve some .....
Found on
http://en.wikipedia.org/wiki/SUPERthrive
No exact match found.
