In 1997, researchers at California State University conducted a trial using GrowPlex™ on tomatoes in Fresno, California.



The trial consisted of two treatments. The first treatment, Control, included the Grower’s standard fertility program. The second treatment, GrowPlex, included the Grower’s standard fertility program and GrowPlex® added at a rate of 4 oz per acre as a drench treatment, then 2 oz per acre at bloom.


  • Treated rows experienced as much as a 27% increase in yield with GrowPlex® compared to the control.

  • Treated rows that received a foliar application of GrowPlex® experienced larger plant canopies than control rows and rows that received only a drench treatment of GrowPlex®.

Research For Other Crops