We take the guesswork out of remineralizing your soil

Step by step we guide you to a set of OMRI organic soil amendment recommendations using OrganiCalc. See a sample soil analysis report. Logan Labs soil test interpretation.

Easy OrganiCalc

$19.50 per test

  • Easy - no data entry required
  • Accurate - no math errors
  • Organic - only OMRI amendments
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Original OrganiCalc

$19.50 for 1 year

  • Instant - full access to OrganiCalc
  • Accurate - no math errors
  • Organic - only OMRI amendments
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Soil testing lab fees are Not Included.  

Which OrganiCalc Shall I Choose?
When Not to Use OrganiCalc

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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.