soil testing:
know your backyard dirt

Not all dirt is created equal. 

Garden soil testing you can do yourself is the great equalizer: Once you know exactly what you're working with, you'll find your gardening success is greatly enhanced.

You want top soil that drains well, yet retains enough moisture to keep the roots from drying out. You want it to have a lot of organic matter for nutrients, yet you want dirt that does not compact yet does allow roots to spread easily.

Dirt is made up of three types of particles: sand (large), clay (small) and silt (medium). The optimum mix is 40 percent sand (for drainage), 40 percent silt (for nutrients and drainage), and 20 percent clay (for nutrients and to conserve water). 

When the soil has that precise mixture, it is called "loam." But how do you know what you have? Garden soil testing can help you find out.

The Soil Testing Squeeze Test

How to do a squeeze soil test:

  • Squeeze a fistful of wet soil samples and release.
  • If it falls apart, your dirt is too sandy or silty.
  • If it holds together in a ball, press on the ball. If it breaks apart easily, you've got the right combination.
  • If the pressed ball sticks together in a hard lump, looks shiny and feels sticky, you've got too much clay.

The Dissolving Soil Test

This soil test involves soaking some soil samples overnight in water.

  • Dig up a small amount of topsoil from your garden.
  • Put the soil in a quart jar (fill just under half full) and top it off with water almost to the rim.
  • Shake until the soil is dissolved and let it sit overnight.

The next day, you will find three different colored layers in the jar.

The heavy sand portion will be on the bottom, with silt in the middle and clay on the top.

There will also probably be some fine organic matter floating in the water.

The more the merrier because the more organic matter, the more nutrient-filled your dirt.

You may, however, want to test your soil's pH level.

Most plants grow best in a neutral pH but some plants, such as rhododendron and azaleas, prefer acidic growing ground.

You might like these:

  • Fall Patio Furniture Cleaning Tips

    Fall patio furniture cleaning is essential to ensure you'll have useable pieces to pull out of storage on those occasional warm winter days and nights ahead.

  • Composting Without Worms

    If you'd prefer composting without worms, that's fine. Here's what to do. The process takes a couple of months because you have to wait for stuff to decay.

  • Backyard Family Living

    Once spring arrives, backyard family living begins - and it's rush hour on patios, flower beds, and lawns. Yet tidying up outside often takes a backseat to garden and pool parties.

  • Bad Garden Bugs: The Dirty Dozen

    These bad garden bugs are wanted in the wild, wild west way - dead or alive. These guys eat or suck the juices out of plants. Here's how to recognize them.

  • How to Clean Patio Furniture

    How to clean patio furniture? Whether yours is wicker, wood, aluminum, teak or resin, these dirty little secrets to cleaning outdoor furniture can help.

  • Yard Work with Kids

    Keeping up the yard is a full-time job, and most of us cannot afford gardeners. Instead, we enlist our child in the yard work process.

  • Transplanting Plants Indoors for Winter

    Temperatures are dropping; plants are taking notice. It's time to begin transplanting plants indoors. Otherwise, this may be your begonia's last summer camp.

  • Patio Furniture Cleaning Tips

    Keeping patio furniture clean can be a challenge. Here are 8 dirty little secrets to mastering the art of cleaning patio furniture.

  • How to Create a Party Friendly Patio

    Do you have a party friendly patio? Get tips on making your patio or backyard the most comfortable entertaining area of your home here.

  1. Clean Home
  2. Backyard and Gardens
  3. Soil Testing: Know Your Backyard Dirt


Have your say about what you just read!