Visit
Holden Arboretum
See what’s happening and on the horizon

The Holden Arboretum encompasses an expansive 3,500 acres including lush woodlands and 200 acres dedicated to thoughtfully cultivated gardens. Plan Your Visit

Visit
Cleveland Botanical Garden
See what’s happening and on the horizon

Cleveland Botanical Garden features outdoor and indoor gardens with native, rare and exotic collections, plus specially curated specimens planted in themed glasshouses. Plan Your Visit

It takes a village to help the forest.

We are experts in research, conservation, and community forestry, and strive to make an impact in Northeast Ohio—and beyond.

Projects
People for Trees™

People for Trees™

Help us reach our goal of 500 new pledges in Northeast Ohio by April 28th, Arbor Day. Join the People for Trees movement now and pledge to make a difference in your community!

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Ash Trees Are Exploding with Seeds; Researchers Are Capitalizing on It

Ash Trees Are Exploding with Seeds; Researchers Are Capitalizing on It

It’s a mast year for ash trees. Holden researchers are launching a new initiative to collect ash seeds from around the region. When conditions are just right, certain trees will produce an exceptionally large number of seeds. The phenomenon is called masting, and, lucky for Holden forestry researchers working with ash trees, this year is… »

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Great Lakes, Great Trees

Great Lakes, Great Trees

The new Great Lakes Basin Forest Health Collaborative is leading the charge to save ash, beech and hemlock trees. Their base is at the Holden Arboretum. Wandering the Holden Arboretum, it’s all too easy to take in the trees, stroll the boardwalk and stop to smell the flowers without ever knowing the impact the Holden… »

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Working Woods

Working Woods

Most of Ohio’s forest is privately owned. Private landowners face a variety of challenges when it comes to land stewardship including succession planning, pests, disease, poor logging practices, pressure from logging companies, and invasive plants. Good forestry addresses these challenges by working with nature so both people AND the woods can thrive.  Learn more about… »

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The Remarkable Life of a Plant in a Forest

May 26, 2023

The Remarkable Life of a Plant in a Forest

Ever wonder what it’s like to be a plant living on the forest floor? Well, it’s a complicated and interesting life using minimal sunlight to photosynthesize and self-sustain.

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Holden Scientists Host High School Students for Senior Projects

May 19, 2023

Holden Scientists Host High School Students for Senior Projects

This week, the Long Science Center and the Leach Research Station were filled with enthusiasm as we welcomed seven high school students for their junior or senior projects!

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Help us find the new-to-North America garlic mustard aphid

May 5, 2023

Help us find the new-to-North America garlic mustard aphid

This week, Holden Forest and Gardens’ Conservation and Research teams collaborated to host a volunteer training for spotting the new-to-North America garlic mustard aphid.

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Snowballing Effects of Beech Leaf Disease Hurt Helpful Root Fungi

April 28, 2023

Snowballing Effects of Beech Leaf Disease Hurt Helpful Root Fungi

The American beech, Fagus grandifolia, is a North American staple and the dominant species in many northeastern forests. In 2012, a new disease was first spotted, infecting trees in northeastern Ohio. The worst afflicted had dark banding on their leaves, which emerged crumpled and leathery in the spring. Not until 2018 would experts discover the nematode pest, Litylenchus crenatae mccannii, overwintering in the buds of infected trees.

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Acid Rain’s Effects Still Visible Belowground in Eastern Forests

April 28, 2023

Acid Rain’s Effects Still Visible Belowground in Eastern Forests

Mayapple (Podophyllum peltatum) is an important member of the forest understory ecosystem. In a new study, researchers at Holden Forests & Gardens found that plants in the eastern U.S. today are still feeling effects of acid rain from decades prior.

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Stop and Smell the Rhododendrons!

April 28, 2023

Stop and Smell the Rhododendrons!

The fast pace and high publication demands of modern scientific research leaves us career scientists little time to “stop and smell the flowers”. Meeting with people who have made detailed observations of natural phenomena are critical for driving our Rhododendron research.

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Learn more about our research and community forestry efforts.

From the Blog
It’s Poppin’: May 26th

May 26, 2023

It’s Poppin’: May 26th

The trees are green, and shade is now dominant in our forests and woodland gardens.  As summer grows near, our blooms will begin to pop in open areas- seek out the Rose Garden and Western Reserve Herb Society Garden for copious blooms and the display garden at the Arboretum.

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The Remarkable Life of a Plant in a Forest

May 26, 2023

The Remarkable Life of a Plant in a Forest

Ever wonder what it’s like to be a plant living on the forest floor? Well, it’s a complicated and interesting life using minimal sunlight to photosynthesize and self-sustain.

Read more
Nature Connects Behind-the-Scenes: One Mantis’ Journey to the Arboretum

May 24, 2023

Nature Connects Behind-the-Scenes: One Mantis’ Journey to the Arboretum

Sean Kenney’s Nature Connects Made with LEGO® Bricks features more than a dozen creations that will adorn the gardens and woodlands of the Holden Arboretum, beginning this Saturday, May 27th.

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33 Splendid Bench Views at the Holden Arboretum

May 24, 2023

33 Splendid Bench Views at the Holden Arboretum

What’s your favorite view at the Holden Arboretum? We have quite a few contenders…but we’ll let you be the judge. Let us know your favorite!

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It’s Poppin’: May 19th

May 19, 2023

It’s Poppin’: May 19th

Isn’t it nice to have spring weather for a long, extended period?  The flowers love it too, and while we are marching toward summer with the onset of the early blooming roses, lilacs, azaleas and rhododendron continue to impress at both campuses. 

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Holden Scientists Host High School Students for Senior Projects

May 19, 2023

Holden Scientists Host High School Students for Senior Projects

This week, the Long Science Center and the Leach Research Station were filled with enthusiasm as we welcomed seven high school students for their junior or senior projects!

Read more

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