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Potting Mix media, is commonly used in greenhouses, raised bed and container crop production. Potting mix is primarily made up of peat moss, perlite, vermiculite, bark, sand, and possibly other ingredients, with properties distinctly different from regular field soil. These products are mixed in various combinations and contain less than 20% of field soil. Therefore, testing soilless growth media requires sampling procedures, test methods and interpretations different from those used for routine field soil testing. A routine soilless growth media test is indispensable to nutrient management for optimal plant performance, problem prevention, or diagnosis.
The LSU Soil Testing and Plant Analysis Lab (STAPL) offers a soilless media test using the Soilless Media Extract (SME) method. The same method is used by most university and commercial labs to test soilless growth media or growth media with very little soil in it. Click on the link below to access a request form.
