Two bio-stimulant extracts from leonardite (PLANT PLUS and FOLIAR PLUS) have produced positive yield responses in field grown cotton, especially when used in conjunction with PIX. Replicated field trials over a five year period have produced plant height, square count, boll retention and yield increases. In these studies PLANT PLUS was applied as an early season soil treatment and FOLIAR PLUS as a post emergence foliar spray. The most striking and repeatable responses have resulted from the application of these bio-stimulants with PIX. Based on observations of these and other studies it appears that the extracts trigger a flowering response in many species of plants and do encourage early square production, flowering and boll retention in cotton. * TRADEMARKS; PLANT PLUS and FOLIAR PLUS are marketed by ACTAGRO, Inc. 4111 N. Motel Dr., Fresno, CA 93722. Originally sold as ACTAPLEX PLUS and FOLOPLEX PLUS respectively.