Sunlight shines through trees in the Longenecker Horticultural Gardens at the University of Wisconsin-Madison Arboretum during spring on May 3, 2020. (Photo by Bryce Richter / UW-Madison)

The UW-Madison’s Extension Horticulture Program provide research-based horticulture information to Wisconsinites so they can make gardening decisions that keep their plants healthy while protecting the environment. We provide research- and evidence-based horticulture management education, resources and decision-making tools to home gardeners and commercial horticulture practitioners.

UW-Madison, Division of Extension, Horticulture Program serves the people of Wisconsin through our dedicated staff throughout the state. If you have a home gardening question please use our Ask a Gardening Question form.

Join our horticulture network to receive research-based gardening updates and information about upcoming educational classes and workshops. Before you sign up, please feel free to review the UW-Madison Privacy Policy.

As you spend time on the website, you may notice we’re silent on some topics. Due to various legal, health and medical reasons, we don’t include content on the following topics.

  • Using plants for medicinal or homeopathic purposes
  • Food nutrition, preparation, preservation and recipes
  • Foraging for mushrooms and plants
  • Identification and growing of mushrooms for human health or edibility
  • Diagnosing risk trees
  • Cannabis and marijuana
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