Large-flowered penstemon
The Arboretum offers free educational tours in Longenecker Horticultural Gardens (LHG) and the Wisconsin Native Plant Garden (WNPG). Tours take place from April through October. They are open to the public and begin at the Arboretum Visitor Center. Garden tour information is suited for adults.
Tours are led by Arboretum garden staff – including Susan Carpenter, the WNPG curator, and David Stevens, the LHG curator – and other regional experts. Tours are cancelled for severe weather.
2025 Garden Tours
Saturday, April 19, 1–3 p.m.
Magnolias. Celebrate the return of spring on a flower-filled stroll through Longenecker Horticultural Gardens’ dazzling collection of over 100 magnolia trees. Tour led by David Stevens, garden curator and Magnolia Society International board member. Due to the popularity of this tour, free registration through Eventbrite is required by April 15.
Saturday, April 26, 1–3 p.m.
Early Signs of Spring. As trees begin to leaf out, Dutchman’s breeches, twinleaf 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 3, 1–3 p.m.
Lilacs. Established in 1935, the Longenecker Horticultural Gardens’ lilac collection is the third largest in the country. Join David Stevens, garden curator, to explore lilac history, lore, culture, and color. Due to the popularity of this tour, free registration through Eventbrite is required by April 29.
Saturday, May 10, 1–3 p.m.
Spring Highlights. Explore the wonders of spring flowering woody plants in Longenecker Horticultural Gardens as garden horticultural specialist Neil Schmidt presents seasonal highlights from the gardens’ expansive collection.
Wednesday, June 11, 7 p.m.
Woodland, Savanna, and Prairie Gardens. Celebrate late spring by visiting our woodland, savanna, and prairie gardens. This tour, led by garden curator Susan Carpenter, provides an overview of the Wisconsin Native Plant Garden.
Wednesday, June 25, 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 9, 7 p.m.
Plants for Pollinators. Learn more about summer-blooming native and ornamental species in Arboretum gardens. Susan Carpenter, Native Plant Garden curator, will highlight plants and gardening practices that support essential pollinators in urban/suburban landscapes.
Wednesday, August 6, 7 p.m.
Native Grasses. Susan Carpenter, garden curator, will focus on color, size, and features of native Wisconsin grasses, from purple love grass to big bluestem, growing in the Wisconsin Native Plant Garden.
Saturday, September 20, 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 11, 1–3 p.m.
Conifers. Join Neil Schmidt, garden horticultural specialist, for a ramble through the Longenecker Horticultural Gardens’ pinetum – the largest and most diverse conifer collection in the state. Designated an American Conifer Society reference garden since 2015, the collection presents a stunning array of conifers from around the country and the world.
Saturday, October 18, 1–3 p.m.
Fall Color. Join David Stevens, garden curator, for a vibrant stroll through Longenecker Horticultural Gardens, where he will highlight sensational seasonal colors and share the science behind this natural phenomenon. Due to the popularity of this tour, free registration through Eventbrite is required by October 14.