||Page updated/verified: Mar 19, 2013
Select Fertilizer Products
All products in this database are currently registered for distribution in Washington State.
Two major pieces of information in the database are the nutrient guarantees and the levels of nine metals found in the product. The "Total Metals in Product" is the concentration of each listed metal found using the analysis required by WSDA. Washington uses a total digestion sample preparation method prior to analysis for the total concentration of the nine regulated metals in each fertilizer product. The Washington standard for metals is based on the concentration of metals in the product and the application rate of the product. To accurately compare products, you need to consider the use rate on the product label. Laboratory testing conditions may differ from environment conditions in the soil after fertilizer application. Therefore, an analysis of an individual soil sample may not reflect the results achieved under laboratory conditions.
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