Soil Testing: How To Take A Soil Sample

Gardener’s World offers professional soil and disease testing services to assist you in making and keeping your garden and landscape the best it can be.

Our two standard soil tests are the pH test and the Full Spectrum or Full Test. The pH test can be completed while you wait* and tests the acidity/alkalinity level of the soil. As plants typically thrive in a neutral or slightly acidic soil, knowing the pH will tell you if the soil needs an acidifier to help it reach optimum levels for your plants.

The Full Spectrum test takes approximately two weeks to complete and tests for pH as well as levels of many vital elements including: organic matter, nitrogen, phosphorus, potassium, calcium, salts, magnesium, zinc and iron. These elements work together and their excess or absence can negatively effect the overall health and production of your plants. Recommendations by Gary Petterson, our company President and Horticulturist, are provided with this test to tell you what is happening in the soil, what fertilizers or soil amendments are needed and in what quantity.

Disease testing is available for the most common soil diseases, fungas. Testing for fungus takes up to one week and will pinpoint which fungus is affecting your soil. A recommendation for treatment is included.

To get the most from your tests, please use the following guidelines in obtaining the soil to be tested:

  • If you have access to a soil probe, this is the most effective method. Otherwise, a shovel or trowel do nicely.
  • Take a sample of dirt that is about 2 - 3 cups in volume.
  • Sample soil from the root zone of the area being tested, about 6 to 12 inches deep.
  • If the sample area is large, a large turf area, numerous trees & shrubs, or a bare yard being prepared for planting, take samples from throughout the area to be tested. Mixing these samples together into one can provide test results that will be effective without the cost of running many tests. In some instances it is preferable to run more than one test on an area. If you have questions, speak to any Gardener’s World Pro.

*when circumstances permit

 


3401 East Baseline Road   Phoenix, Arizona 85042
(602) 437-0700    (602) 437-8660 Fax

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March 15 - May 15 open til 6 Mon-Sat

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