Soil testing kits: Are home tests accurate or should you send it to a lab?
By My Yard Editorial Team · 7/28/2026
The Quick Answer
Home kits are fine for a rough pH reading. For nutrients, send it to your county extension lab — usually $15–$30 and dramatically more accurate.
The Witty Breakdown
The cheap color-change kits measure something. What they measure varies with how you shook the tube.
A lab report tells you pounds of lime and nutrients per 1,000 sq ft, which is the only number that changes what you buy.
Step-by-Step Fix
- 1
Pull 8–10 core samples across the yard at 4 inches deep and mix them.
- 2
Test separately for lawn versus vegetable beds — they need different targets.
- 3
Send in fall so you can apply lime over winter.
- 4
Retest every 3 years, not annually.
Pro-Tip / Do Not Do This
Don't sample right after fertilizing. You'll get a report describing the bag you just opened.
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