Horticulture

A plot of Brussels sprouts is pictured as volunteers from UW-Madison’s F.H. King Students for Sustainable Agriculture harvest fresh produce and vegetables from their farm plot at Eagle Heights Community Garden at the University of Wisconsin-Madison on Sept. 13, 2020. The students harvested more than 300 pounds of fresh produce, which they later distributed for free to nearly 100 people during a Harvest Handout outreach event held on East Campus Mall. F.H. King hosts the Harvest Hand out each Sunday from 12:30-1:30 p.m. (Photo by Jeff Miller / UW-Madison)

Horticulture

The University of Wisconsin-Madison’s Extension Horticulture Program is a leading source of horticultural knowledge renowned for its commitment to delivering research-based information and guidance to the people of Wisconsin. We provide evidence-based horticulture management education, resources, and decision-making tools to home gardeners and commercial horticulture practitioners so Wisconsinites can keep their plants healthy while protecting the environment.

Summer Gardens

A simple rain barrel with intake from a downspout (top), a drainage spout (bottom), and an overflow spout (side).

A rain barrel can be any large container designed to collect rain water. The primary purpose of a rain barrel is to provide homeowners and gardeners a source of soft, slightly acid water that is typically preferable to city water (which may be chlorinated) or well water (which may have excessive mineral content) for irrigating woody and herbaceous ornamentals, as well as lawns. 

Two leaves with tar spot disease.

Ten Common Plant Diseases/Disorders You Can Diagnose by Eye.

Send a plant sample for analysis by contacting the UW Plant Disease Diagnostics Clinic (PDDC), and for a small fee, clinic staff can examine a plant, determine the cause of the disease/disorder, and provide advice on how to control or prevent the issue.

Bumble bees fly around flowers at the UW-Madison

Approximately three quarters of the world’s major food crops require or benefit from animal pollination.  This includes many fruits and vegetables such as strawberries, blueberries, raspberries, currants, plums, apples, sweet cherries, pears, watermelons, cantaloupes, cucumbers, squashes, and tomatoes.  Pollinators also are beneficial for seed production in crops such as carrot, onion, broccoli, cauliflower, cabbage, and many herbs.


Ask Your Gardening Questions

We are here to assist you with your indoor and outdoor plant, yard and landscape questions.

Contact Julie, your Jefferson County Horticulture Outreach Specialist, directly with your gardening questions:
Email:julie.hill@wisc.edu
Office Phone: 262-741-4958
Text/Cell Phone: 262-374-4191

Or use the Ask Your Gardening Question online form: https://hort.extension.wisc.edu/ask-a-gardening-question/

Presentations and Outreach

Julie, your Jefferson County Horticulture Outreach Specialist, is available to provide presentations on a variety of gardening related topics for groups and organizations. To schedule a presentation contact Julie at julie.hill@wisc.edu or 262-741-4958. View the presentations she currently has available by clicking the “Presentation List” button below.


Upcoming Events

Growing and Caring for Plants in Wisconsin: Foundations in Gardening

Improve your gardening skills with Extension!

Want to be a better gardener? Whether you’re new to gardening or looking to deepen your skill set, Growing and Caring for Plants in Wisconsin: Foundations in Gardening is the course for you. This online, self-paced course teaches practical gardening skills along with easy-to-understand explanations behind why and how they work. 

Foundations in Gardening runs Sept. 6-Dec. 12, 2026. Register before Aug. 9 to receive an Early Bird registration discount. Regular registration runs Aug. 10-24. A limited number of need-based scholarships will be available on a first-come, first-served basis. Learn more about the Foundations in Gardening course.

This course is an approved learning opportunity for those interested in joining the Wisconsin Extension Master Gardener Program. Learn how to become a Master Gardener at mastergardener.extension.wisc.edu/join.


Julie Hill
Horticulture Outreach Specialist
Serving Walworth, Rock and Jefferson Counties
Email: julie.hill@wisc.edu
Office Phone: 262-741-4958
Cell Phone: 262-374-4191