Horticulture Resources

Soil Sampling & Lab Tests

UW – 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.

Insect Pest Identification

UW – Department of Entomology Insect Diagnostic Lab

This web site has great pictures and recommendations that can help you identify the insect of concern in the home or on plants.

Note: An old film container works well for sending in insect samples to the lab. You may also e-mail the lab a digital photo of an insect for identification. There is no fee for this service at this time.

Follow-up help : If you cannot figure out what insect you have from the web site you may call or e-mail the UW-Extension Horticulture Educator in St. Croix County. Cultural and chemical control recommendations can also be provided.

Plant Disease Lab Testing and Publications

UW – Plant Disease and Diagnostic Clinic

This web site has great pictures and recommendations that can help you identify the plant diseaes of concern in the home or on plants.

Tree and plant samples can be sent into the UW-Extension Plant Clinic to confirm with a labatory analysis what specific disease your plants may have.

Note : A fee is charged for this service so it is most appropriate for concerns with valuable trees, turf or horticulture crops. However, anyone may use this lab service. Make sure you package the samples as directed or the lab test will be inconclusive.

Follow-up help :
If you cannot figure out what disease is on your plants from the web site you may call or e-mail the UW-Extension Horticulture Educator in St. Croix County. Cultural and chemical control recommendations can also be provided.