Join us for the first Lilac Sunday since 2019! We’ll be celebrating 150 years of Arboretum history and 112 Lilac Sundays.
Experience the springtime bloom of our renowned collection of nearly 400 lilacs. Visit for tours with Arboretum experts, hands-on children’s programming, and more.
Participate in the Arnold Arboretum’s 2021 Tournament of Trees! Get to know this year’s Sweet Sixteen contenders (March 3–9) and cast your votes in this fun bracket style tournament. Let the March Tree Madness games begin.
Take a guided tour of the state-of-the-art Weld Hill Research and Administration Building! You will learn about some of the cutting edge plant research taking place there, and explore the “green” building design.
