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Get OMRI organic soil amendment recommendations tailored specifically for your soil using OrganiCalc. See a sample soil analysis report. Order your Logan Labs soil test here.

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OrganiCalc recommends all OMRI organic amendments to build a balanced reserve of the following essential plant nutrients as measured by Mehlich 3 or AA 8.2 extraction

  • Cations – calcium, magnesium, potassium, sodium
  • Anions – phosphorus, sulfur
  • Micronutrients – boron, iron, manganese, copper, zinc, cobalt, molybdenum, and silicon
  • Nitrogen – supplied via compost or other organic materials

The Grow Abundant OrganiCalc worksheet is both powerful and easy to use, and the results I’ve had using it on my farm have been nothing short of spectacular. Erica has opened up the world science-based remineralization to everyday gardeners and farmers, and has allowed us to take control of the health of our soils.
— Ryan Nassichuk, Quadra Island, British Columbia, Canada

If it isn’t in the soil, it won’t be in your food.