Lab Analysis of Your Compost, Made Easy

Whether you are comparing your compost from one season to the next, or sharing it with others, a detailed lab compost report allows you to know precisely where your levels are and exactly what nutrients this compost will add to your soil.

Rx Soil Compost Analysis


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Soil analysis kit
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Full Compost Analysis Report

Just like any other soil amendment, your compost also has ratios of important macro and micro nutrients. With a simple mail-in lab test, you can identify these, and know precisely what you are adjusting in your soil.

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Know the Strengths of Your Compost

Your soil amendment report will details 18 properties of your sample, letting your track the progress of your batch or continuous compost over time. Contents are reported to you both as percentages and weights.

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Fast Free Shipping

Two-way shipping costs are included - to get the collection materials to you, and to mail your soil sample to the lab. Get your compost report right from the comfort of your home in about one week.

A Compost Testing Report With Convenience and Ease

Like other Rx Soil testing services, your soil compost sample is processed quickly at a commercial-grade agronomics lab, and we typically have results returned to you about a week later. Your soil compost report will detail the following properties:

  • Moisture Percentage
  • Solid Percentage
  • Total Nitrogen
  • Phosphorus
  • Potassium
  • Sulfur
  • Magnesium
  • Calcium
  • Sodium
  • Iron
  • Aluminum
  • Manganese
  • Copper
  • Zinc
  • Boron
  • Ammonium
  • P2O5 Equivalent
  • K2O Equivalent

As with all of our testing, you have the option of using our site to assign your results to a growing area. This allows you to keep track of your compost data over different batches and different seasons.

Here is an example of the data you will find in your compost nutrient report:

Compost data breakdown by moisture and n, p, and kCompost data breakdown by individual nutrients and parts per million

Ready to get started? Purchase our compost soil analysis now or contact us with any questions.

Rx Soil Compost Analysis


Do you agree to our terms and conditions?
Soil analysis kit