- Spend summer outdoors!
- Pollinator Express
- What’s in bloom
We conserve ecosystems, work to understand climate impacts on the Lower Great Lakes region, and foster a love for nature.
Just 30 minutes from downtown Cleveland, the Holden Arboretum is a living museum of exquisite collections of plants and trees on 3,500 acres with miles of trails, gardens. and woodlands. Plan Your Visit
In the heart of University Circle, Cleveland Botanical Garden is an urban oasis with mesmerizing gardens and curated glasshouses, offering a refreshing escape from the bustle of city life. Plan Your Visit
There are no better places to find unexpected seasonal beauty than at the Holden Arboretum and the Cleveland Botanical Garden.
Holden scientists, conservationists and community foresters are award-winning and nationally acclaimed.
A seed bank for regional restoration at the Holden Arboretum is working to combat climate change by collecting, storing, and redistributing native seeds of local ecotype to foster resilient forests.
Learn moreHolden is a leader in the study of beech leaf disease, a new forest pathogen sweeping across North America from its epicenter in northeastern Ohio. Our work has helped identify the means of the disease’s spread, and continuing work aims to reveal the mechanisms of the disease as well as a path to breeding trees resistant to the disease.
Learn moreAs our climate changes, understanding how plants respond is critical for preparing for and mitigating what’s to come. An important driver of how plants respond to their environment is the plant microbiome, the bacteria and other microbes that live in tandem with the plants.
Learn more about our research and community forestry efforts.
May 17, 2024
Holden Arboretum While the rhododendrons and azaleas as still the show, I’ll start this week by showing you several of our late spring bloomers that are opening now in the… more
May 10, 2024
Calling all azalea admirers! This is the weekend to visit the Holden Arboretum or the Cleveland Botanical Garden. Our azaleas are in their prime and boasting an excellent display this… more
May 9, 2024
It’s spring, which means that plants are popping at the David G. Leach Research Station! Home to Holden’s premiere rhododendron and azalea collection, our site near the shore of Lake… more
People for Trees™
Plant and care for a tree beginning with making a pledge. We will support each pledge with easy-to-follow instructional toolkits, guidance on how to select the most appropriate tree and where to purchase it, free virtual classes and other ongoing support.
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