Plant growth regulator (PGR)
Revision as of 15:54, 26 July 2007 by Kdanneberger (talk | contribs)
1. A chemical agent applied to plants to suppress their growth.
This is one type of PGR, many come in soluble forms like this.
Source: http://www6.mailordercentral.com/igcusastore/products.asp?dept=1086