The Arboretum offers free informational tours in Longenecker Horticultural Gardens (LHG) and the Wisconsin Native Plant Garden (WNPG). Tours take place on selected dates from April through October, Wednesday evenings from 7 p.m. to dusk, or Saturday afternoons from 1 to 3 p.m. Tours are open to the public and begin at the Arboretum Visitor Center. They are intended for adults.

With more than 2,500 types of plants on display, Longenecker Horticultural Gardens feature an internationally recognized collection of trees, shrubs, and vines. It is a resource for the study of landscape plants by educators, the public, and the nursery trade. The gardens hold major displays of lilacs, flowering crabapples, viburnums, conifers, and many other plant groups.

The 4-acre Wisconsin Native Plant Garden surrounds the Visitor Center with several hundred species native to Wisconsin. The garden serves as an introduction to ecological restoration and the restored and managed plant communities in the Arboretum. It also demonstrates how to incorporate native plants into home landscapes.

Tours are led by Arboretum garden staff—including Susan Carpenter, the WNPG gardener, and David Stevens, the LHG curator—and other regional experts. Tours are cancelled for severe weather.

2022 Garden Tours

Saturday, April 30, 1–3 p.m.
Magnolias. Tour the Longenecker Horticultural Gardens’ extensive collection of more than 80 magnolia trees. Join David Stevens, garden curator, for a blast of dazzling spring color. This tour has  been rescheduled from April 23 to April 30, pending bloom progress.

Saturday, April 30, 1–3 p.m.
Early Signs of Spring. As trees begin to leaf out, Dutchman’s breeches, twin-leaf and rue-anemones might be blooming in the woodland gardens, and prairie-smoke in the prairie gardens. Susan Carpenter, garden curator, will lead this tour of the Native Plant Garden.

Saturday, May 7, 1–3 p.m.
Lilacs. Established in 1935, the Longenecker Horticultural Gardens’ lilac collection is one of the largest in the country. Join David Stevens, garden curator, to explore lilac history, lore, culture, and color.

Saturday, May 14, 1–3 p.m.
Crabapples. With over 200 trees, the Longenecker Horticultural Gardens crabapple collection is the most up to date in the country. Learn why crabapples are the most planted flowering tree in the Midwest with David Stevens, garden curator, who will highlight some of his favorite selections.

Wednesday, June 15, 7 p.m.
Woodland, Savanna, and Prairie Gardens. Celebrate late spring by visiting woodland, savanna and prairie gardens. This tour, led by garden curator Susan Carpenter, provides an overview of the Wisconsin Native Plant Garden.

Wednesday, June 22, 7 p.m.
What’s in Bloom? Join Susan Carpenter, Wisconsin Native Plant Garden curator, to find, compare, and learn about flowers on native trees, shrubs, and herbaceous plants.

Wednesday, July 13, 7 p.m.
Plants for Pollinators. Learn about summer-blooming native and ornamental species in Arboretum gardens. Susan Carpenter will highlight plants and gardening practices that support essential pollinators in urban/suburban landscapes.

Wednesday, August 3, 7 p.m.
Native Grasses. Susan Carpenter, Wisconsin Native Plant Garden curator, will focus on color, size, and features of native Wisconsin grasses, from tiny mustache grass to big bluestem.

Saturday, September 17, 1–3 p.m.
Fall in the Native Plant Garden. Color, fruits, seeds, late blooming plants, late-season insects—we will find these and more in the diverse native plant gardens around the Visitor Center. Susan Carpenter, garden curator, will lead this tour.

Saturday, October 8, 1–3 p.m.
Conifers. David Stevens, garden curator, will explore the Longenecker Horticultural Gardens’ pinetum—the largest and most diverse conifer collection in the state. Located on a glacial drumlin, the collection presents a diverse array of conifers from around the world.

Saturday, October 15, 1–3 p.m.
The Colors of Fall. Join David Stevens, garden curator, for a stroll through Longenecker Horticultural Gardens highlighting sensational seasonal colors and exploring the science behind this natural phenomenon.