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March 21, 2024
Let’s Celebrate the Forest Today
By Rachel Kappler, Great Lakes Basin Forest Health Collaborative (GLB FHC) Coordinator
It is the International Day of Forests, a day to celebrate local forests and this year’s theme is Forestry and Innovation. You might be surprised to find out that Holden... more
March 13, 2024
Monitoring Hemlock Woolly Adelgid Colonization
By Danny Dlugos, PhD, Senior Research Specialist - Plant Breeding
Eastern hemlock (Tsuga canadensis) is one of the most recognized trees in Northeast Ohio. Native to the eastern United States and Canada, it ranges from Nova Scotia south along the... more
February 29, 2024
Don’t Be Over-elm-ed When Planting a Tree
By Amanda Wood, Urban Community Forester
Even though the weather is still trying to figure out what it wants, spring is around the corner which means trees will be putting out leaves soon! This means that... more
January 29, 2024
Girdling and Invasive Species Management: A Recipe for Healthier Forests
By Chad Knisley, Natural Areas Manager
We have over 2,000 acres of forest at Holden Arboretum. Our conservation department cares for these forests, with goals of improving their health and function. Several years ago, we initiated... more
February 29, 2024
Don’t Be Over-elm-ed When Planting a Tree
By Amanda Wood, Urban Community Forester
Even though the weather is still trying to figure out what it wants, spring is around the corner which means trees will be putting out leaves soon! This means that... more
January 16, 2024
A Beginner’s Guide to Pruning
By Maggie Billings, Native Plant and Pollinator Specialist, AmeriCorps Member
Pruning is a must know when it comes to tree and garden care, but why? Pruning often rejuvenates plants and allows them to grow more efficiently. Taking off old growth... more
October 31, 2023
Protecting Your Broadleaf Evergreens from Frost Damage
By Nicholas Chilson, Garden Technician
The Eliot and Linda Paine Rhododendron Discovery Garden at the Holden Arboretum has many evergreen Rhododendrons and Azaleas. These plants, although winter hardy, are still susceptible to frost damage, and... more
January 29, 2024
Girdling and Invasive Species Management: A Recipe for Healthier Forests
By Chad Knisley, Natural Areas Manager
We have over 2,000 acres of forest at Holden Arboretum. Our conservation department cares for these forests, with goals of improving their health and function. Several years ago, we initiated... more
November 27, 2023
The Story of Ohio Family Forests
By John Brett, Forestry Outreach Fellow
Pull on a sweater and grab something warm to drink, it’s time to reflect and be grateful as the world dozes off for the winter. Many of us are lucky... more
August 1, 2023
Rescuing Edible and Medicinal Plants
By Aisha Zungu, Woodland Community Forestry Intern
Summer is a flowering and fruiting time when many of the bushes and shrubs come to life with their colors and fruits. Summer is also a time of change for... more
March 13, 2024
Monitoring Hemlock Woolly Adelgid Colonization
By Danny Dlugos, PhD, Senior Research Specialist - Plant Breeding
Eastern hemlock (Tsuga canadensis) is one of the most recognized trees in Northeast Ohio. Native to the eastern United States and Canada, it ranges from Nova Scotia south along the... more
January 25, 2024
Garlic Mustard and Its Newly Introduced Aphid
By Kaylin Engerman, Norweb Fellow
Garlic mustard is an herb covering forest floors across North America. However, it wasn’t always found here. Garlic mustard is an invasive species brought to the United States from Europe... more
January 9, 2024
Protecting Eastern Hemlocks from Tiny Tree-Killing Invaders
By Albert Jackson, Conservation Seasonal
The Holden Conservation Department is on the hunt for tiny tree-killing pests. During the early and mid-20th centuries, two non-native tree dwelling insects were unintentionally introduced to the eastern United... more
January 23, 2024
Can inoculated soils promote healthy urban trees? Preliminary results
By Claudia Bashian-Victoroff, MS, Research Specialist
Preliminary results from a Holden research project testing soil inoculations for improvement of urban tree plantings. more
December 5, 2023
World Soil Day: Holden’s Soil Ecologists Improving the Odds for Trees in Urban Environments
Efforts are underway to plant trees in Cuyahoga County’s urban areas by the thousands. In these cities, canopy cover is well below the county average, which brings well-documented ill effects... more
September 26, 2023
A Story for the Ages Lives On: The Jesse Owens Olympic Oak Plaza Dedication
On Monday, September 25th, the team at University Circle Inc. dedicated the Jesse Owens Olympic Oak Plaza in Rockefeller Park just north of the Wade Lagoon. Elected officials, community leaders,... more
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