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How To Test Soil Acidity/Alkalinity without a Test Kit

Do-It-Yourself Soil Test

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Man wearing jeans and boots holding dirt in hands
Compassionate Eye Foundation/Steven Errico/Getty Images

Find out if your soil is acidic or alkaline without a pricey test kit.

Difficulty: Easy

Time Required: 15 minutes or less

Here's How:

  1. Scoop some soil into a container. Then, add a half-cup of vinegar. If the soil bubbles or fizzes, it's alkaline.
  2. If there's no reaction, scoop a fresh soil sample into a second container. Add a half-cup of water and mix. Then, add a half-cup of baking soda. If the soil bubbles or fizzes the soil is highly acidic.
  3. Amend your soil with wood ash or lime, if it's acidic. Amend your soil with sulfur or pine needles, if it's alkaline.

    For more information:

    Alkaline Soil
    Acidic Soil

Tips:

  1. If you want a precise pH measurement, get a soil test kit from your local university extension office or home improvements store.
  2. Soil amendment takes time, so make small changes and wait for them to take hold, before making further amendments.

What You Need:

  • A soil sample
  • Vinegar
  • Baking soda
  • Water
  • 2 sample containers
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