How to Test Soil pH

Testing Soil pH in Your Garden Soil

Maintaining the proper pH for your garden is critical if you want an abundant crop. The pH levels can be

either too high or too low for growing vegetables. Ideally it should be between 5.5 and 6.5 for most vegetables. If it is too much higher it is approaching that magic number 7 which indicates that it is alkaline. If your soil is too alkaline there are several simple ways to neutralize it.

Here are some steps to follow to lower the soil pH. If your soil is too alkaline there are several simple ways to neutralize it. The following guidelines are offered on how to test soil ph and to adjust it.

How to test the pH:

1. Test your soil's pH level to determine the best method of neutralization.

2. Purchase a soil pH tester from your gardening supply store, and follow the manufacturer's instructions. The test kit should include a testing cup, chemicals to conduct the test and a color chart indicating the varying pH levels.

3. Scoop a random sample of dry soil from just below the surface out of your garden and put it in the testing cup.

4. Add the recommended amount of testing solutions and combine them by shaking.

5. Let the chemicals stand in the soil for approximately 10 minutes.

6. Identify the pH level by comparing the color of the test result to the closest color on the test chart. A reading of 7 is neutral. Anything above 7 is alkaline, while a reading below 7 is acidic.

Lower the soil ph:

First consider the types of plants you're adjusting the soil for, as certain chemicals will impede the growth of some species.

1. To lower the soil's pH level almost instantly, add aluminum sulfate. Adding sulfa will also lower the pH but it will take much longer.

2. Apply the recommended amount as determined by how many square feet your garden is, as well as the reading of the pH level test. The instructions should include a table regarding this information.

3. Work the aluminum sulfate into the soil thoroughly using a rake or similar implement.

4. Rinse any excess aluminum sulfate away from any plants to prevent damaging their leaves.

Increase the soil ph:

To increase the soil ph add agricultural lime. The particle size is important, since smaller particles will dissolve quicker and therefore change pH much quicker. The amount of lime required is usually listed on the package. However, if you have a lot of organic matter in the soil you may need more lime than if you have less organic matter. Firewood ash includes a lot of nutrients but they may cause damage to the plats depending on which ones you plant.

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