ISO NPK 3-1-3 is an organic biofertilizer applied with organic or conventional fertility programs. The benefits are higher yields from enhanced nutrient uptake and resistance to abiotic* stresses over the crop cycle. Scientific research and field trials confirm the efficacy of ISO NPK 3-1-3, demonstrated in the following ways:

  1. Improved photosynthesis and plant vigor
  2. Improved tolerance and recovery from abiotic* stresses
  3. Enhanced quality attributes including sugar content, fruit retention, and sizing.

*Abiotic stresses include heat, cold, drought, and salinity.

ISO NPK Label OMRI (All States)
ISO NPK Label OMRI (California)
ISO NPK Crop Specific Directions
OMRI Certificate
CDFA Organic Certificate

Field Trials






See What Others Are Saying

I achieved 26% greater corn yields with ISO NPK
Dave Lankford, Agri-Measures
“When I saw the increased size and enhanced color after the second application of the ISO product on Blueberries, I knew there would be a difference in yield. When you see something that pronounced as early as it was, you really want to keep your eye on it.”
Rudy Allen, CPAg/CCA-NW, Ag Tech Services, LLC
“Based on the trials that we experienced on our farm, we are convinced that ISO NPK represents the future for yield increases in vegetables and grains. We will now be using ISO NPK for corn and soybeans across our entire farm.”
David Mattix

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