The Yard Mastery Soil Test Kit gives you lab-analyzed results for pH, macronutrients, and micronutrients — then builds a custom fertilizer program in the app based on exactly what your soil needs. Stop guessing. Start growing.
A great lawn starts below the surface. The Yard Mastery Soil Test Kit measures your soil's pH, macronutrients — nitrogen, phosphorus, and potassium — plus secondary and micronutrients like calcium, magnesium, sulfur, iron, manganese, zinc, copper, and boron.
You'll also get your soil's organic matter percentage and a base saturation breakdown, giving you a complete picture of what's happening underground. No more applying products your soil doesn't need.
Your soil test results feed directly into the free Yard Mastery app. Instead of just handing you a spreadsheet of numbers, we turn your data into a complete, scheduled fertilizer program tailored to your soil's actual needs.
You'll see exactly which products to apply, how much to use, and when to apply them — all laid out on a calendar. One tap to buy everything you need, with a full program preview so you know what's coming before the season starts.
Shop the Soil Test Kit →
Most DIYers buy fertilizer based on what the bag says or what worked for someone else. But every lawn is different. Without knowing your soil's actual nutrient levels and pH, you could be over-applying some nutrients and missing others entirely.
A soil test takes the guesswork out of the equation. You'll spend less on products you don't need, get better results from the products you do apply, and build a lawn care program that actually matches your soil — not someone else's.
You don't need to be a soil scientist. The kit comes with everything you need: sample bags, step-by-step instructions, and a prepaid mailer. Collect samples from a few spots across your lawn, mix them together, fill the bag, and drop it in any USPS mailbox.
There's even a video walkthrough in the Yard Mastery app that shows you exactly how to collect your sample. Results arrive in 5–7 business days, and you'll get a notification in the app as soon as they're ready.
Get everything you need in one box — sample bags, step-by-step instructions, and a prepaid mailer. Nothing extra to buy.
Grab soil from 8–10 spots across your lawn, mix it together, fill the bag, and drop the prepaid mailer at any USPS mailbox.
Within 5–7 business days, your lab-analyzed results appear in the Yard Mastery app — pH, macronutrients, micronutrients, and organic matter.
The app builds a season-long fertilizer plan from your soil data — with the right products, rates, and timing scheduled out on your calendar.
It's my second time using it and it's very easy — there's even a video showing you how to do it. It's a game changer. I did the test, downloaded the app, and watched my yard transform in a couple of months.
Steven B.
Perfect. I use this product every year. Sometimes twice per year. Love the details and app availability.
Laurent J.
Even if you're confident in your lawn's look and health, it's still great to know what your soil composition is and what you could be doing better. This allows the results to further customize your lawn care program.
Cole
The kit tests for soil pH, macronutrients (nitrogen, phosphorus, potassium), and secondary/micronutrients including calcium, magnesium, sulfur, iron, manganese, zinc, copper, and boron. You'll also get your soil's organic matter percentage and a base saturation breakdown.
Use a clean trowel or soil probe to collect small samples from 8–10 spots across your lawn at a depth of about 4 inches. Mix them together in a clean bucket, then fill the included sample bag. The kit comes with step-by-step instructions and we have a step-by-step video walkthrough that shows you exactly how to collect your sample — watch it here.
After the lab receives your sample, results are typically available within 5–7 business days. You'll get a notification in the Yard Mastery app as soon as your results are ready.
The app isn't required, but it's free and highly recommended. Your results feed directly into the app, which generates a custom fertilizer program based on your soil's actual needs. Without the app, you'll still receive your results but won't get the personalized program. Download it free on iOS or Android.
We recommend testing at least once a year — ideally in early spring or fall. If you're making significant amendments based on your results, testing again after a full season helps you track progress and adjust your program.
Yes. If different areas of your yard have different soil conditions (e.g., front yard vs. backyard), you can purchase multiple kits and submit separate samples. The app supports tracking results for multiple zones.
Know exactly what your soil needs. Get lab-analyzed results and a custom fertilizer program built for your lawn — all in the free Yard Mastery app.
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