Garden Tour 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: uw-madison-arboretum.eventbrite.com . Meet at the Visitor Center. University […]