Learn About Your Soil

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Easy Soil Testing Guide for a Healthier Lawn

Ever question which fertilizer is best for your lawn?  How about how much fertilizer to purchase and apply to your lawn?  Perhaps your lawn isn’t looking healthy as you want it after the money, work, and effort put into it.  

Well, you may be feeding your lawn the wrong fertilizer and potentially the wrong amounts.  

Soil testing is crucial for a healthy lawn. It helps you choose the right fertilizer and saves you time and money. Here's how to do it easily:

Why Soil Testing Matters

Find the Right Fertilizer 

Soil tests and their easy to read results show what your soil needs to be fed, so you don't waste money on the wrong products.

Save Time

Knowing your soil's condition and what it’s asking for helps you make smart decisions for your lawn without guesswork.

Save Money

Getting a soil test stops the guesswork, so say goodbye to wasting all your money on the wrong fertilizer. 

How to Test Your Soil

When to Test

Start with a soil test at the beginning of the season. Once you have your first soil test completed, that will provide you with a proper foundational understanding of your property.  From there, it’s recommended to test your soil every 3-5 years to track progress.

Soil testing can be done year round as long as the soil is not frozen - However, it is recommended to wait at least 30 days after any fertilization applications to avoid any skewed results.  

What to Test

Create a diagram of your property and note different areas like full sun or shade.  It’s very common to have multiple environments within each property.  It is recommended to conduct a soil test from each unique environment within your property. Collect soil samples from these areas to submit.  

How to Collect Samples

Use a soil probe or shovel to collect multiple 3-inch deep cores from each area. 

Tools needed for soil sample collection: 

  • Soil Probe and Soil Test Kit: To collect and submit soil samples
  • Clean bucket for each soil testing area: To hold and mix collected samples
  • Gloves: To avoid any unnecessary contaminations
  • Diagram of your property: To record the locations of collected samples
  • Soil Test Kit: To submit and receive your soil test results

Mix the samples in a clean bucket and let them dry at room temperature.  Remove any debris, thatch, or grass from your final sample and break up any large pieces of soil. 

Submitting Samples

Follow the instructions on your soil test kit. Most kits provide a container for your sample and detailed instructions on how they should be shipped to the soil testing lab. If not, use a clean, labeled container for delivery/shipment. 

I use MySoil and recommend their tests for any new homeowner or those at the beginner/intermediate level in lawn care.  Their tests are incredibly easy to understand and point you in the right direction towards what fertilizers you’ll need (and how much of them) to start making positive changes in your lawn. 

What Soil Testing Reveals

pH Levels

Determines if your soil is acidic, neutral, or alkaline, affecting nutrient availability.  If these levels are too low or high, the plant will not be able to uptake nutrients at the optimal levels.  

Macronutrients and Micronutrient Levels

Includes a current snapshot of your soil’s macronutrient and micronutrient levels. 

Macronutrients include Nitrogen (N), Phosphorous (P), Potassium (K), otherwise known as “The Big 3.”  Secondary nutrients that also hold a great importance are Calcium (Ca), Magnesium (Mg), and Sulfur (S). 

Micronutrients include Boron (B), Chloride (Cl), Copper (Cu), Iron (Fe), Manganese (Mn), Molybdenum (Mo), Nickel (Ni), and Zinc (Zn). 

How to Adjust

Based on your soil test results, you may need to add lime to raise pH or sulfur to lower it if your pH levels are unbalanced. Adjusting nutrient levels with the adequate amount of fertilizers and amendments helps plants grow better while minimizing any harm to the environment.

Soil testing might seem complex, but it's worth the effort. By understanding your soil, you can care for your lawn more effectively, enjoy a healthier, greener lawn, and most importantly save time and money in the process.

References: 

https://www.extension.purdue.edu/extmedia/ho/ho-71-w.pdf

https://extension.purdue.edu/news/county/marion/2021/09/Soil-Testing-Information.html

https://soiltest.cfans.umn.edu/testing-services/lawn-garden