How to Test Soil Nutrients

mediumGardening1-2 weeks7 steps

Safety Warnings

Soil Sampler/Trowel — Standard garden tool for extracting soil cores

Blue Litmus Paper — pH indicator strips

Sampling Bags/Containers — Clean, sealable containers for lab submission

Soil Sample — Moist soil collected from target area(Variable)

Submission Form — Lab Form H (for gardeners)(1)

Conduct a quick pH field test using blue litmus paper by pressing it against a handful of moist soil.

Tip: If the blue paper turns red, it indicates an excess of acid and a need for liming.

Determine if you need a basic nutrient analysis or specialized testing for heavy metals or contaminants.

Tip: Use specialized lab guides for heavy metal sampling if gardening in urban areas.

Collect soil samples following the specific sampling instructions provided by your chosen soil health lab.

Tip: Ensure samples are representative of the area being tested.

Complete the required submission forms, such as Form H for gardeners, including the specific crop code for your intended plants.

Tip: Selecting a specific crop code allows the lab to provide tailored nutrient management fact sheets.

Submit the soil samples to a professional laboratory (e.g., Cornell Soil Health Lab) for nutrient and metal analysis.

Tip: Check for designated pick-up points in your region for easier submission.

Decipher the soil nutrient test results to identify deficiencies or excesses.

Tip: Review the results in conjunction with provided recommendations for your specific planting type.

Consult crop-specific report guides (e.g., for Lawns, Mixed Vegetables, or Fruit Trees) to interpret the data correctly.

Tip: Urban farmers should use specialized interpretation recommendations for high organic matter soils.

For professional accuracy, utilize research-based nutrient guidelines for both soil and plant tissue.
Soil pH tests are critical because lime helps make other plant foods soluble in the soil.

Synthesized from 3 verified sources:

Cornell Garden-Based LearningView →

Gutenberg: War Gardens GuideView →

Gutenberg: Manual of GardeningView →