Lab Testing

Soil Sampling & Lab Tests

UW Madison– Soil and Plant Analysis Laboratory

Please obtain information on soil sampling and lab forms through this link. Soil testing directions and bags are also available at the UW-Extension Office in St. Croix County in Baldwin or call the Baldwin Office at 715-531-1930 to have a bag and forms sent to your home or business.

The UW-Extension has two soil testing labs. Tests are available to home gardeners and commercial horticulture businesses. Using a soil test can:

  • can save you money on fertilizer by customizing your fertilizer applications to the your specific soil and the plants or crops you will be growing
  • help you optimize the growth of your plants by identifying any nutrient deficiencies
  • can minimize the effects of fertilizing on the natural environment by helping you avoid fertilizer application in excess of what is needed. Excess fertilizer can pollute your groundwater and our community lakes and streams.

Note : Make sure you take a composite sample of 10 samples to put in one test bag to get an average level of soil fertility.

Follow-up help : If you need help understanding the soil test results you may call or e-mail the UW-Extension Horticulture Educator in St. Croix County.