Morris Arboretum

Morris Arboretum

Connecting people, plants, and place.

University of Pennsylvania

Notice: Our website is currently undergoing maintenance and information may not be current. For assistance please contact


Plant Resources

New! Fall Leaf I.D.

A new online feature to help identify fall leaves. Learn about the season's classic colorful gems or discover a few special finds!

Click here to learn more

Morris Arboretum Plant Clinic

Our free plant clinic service is available from 1:00 - 3:00pm Monday-Friday (except Thursday), located in the Widener Visitor Center.

Samples you wish to be evaluated can be dropped off from 10:00am - 4:00pm. Leave all samples in the Visitor Center with a description of your observation or concern, and how we can reach you.

Contact the Plant Clinic at or 215.247.5777 ext.141

Pennsylvania Flora Project

Department of Botany at Morris Arboretum.

Visit the PA Flora Project website for more information.

Plant Invaders of Mid-Atlantic Natural Areas

Revised & Updated (2010), with More Species and Expanded Control Guidance provided by the National Park Service and U.S. Fish and Wildlife Service.

Visit their website for more infomation.

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Visitor Resources




In Bloom

Seasons Newsletter


Spring Classes
Learn more

Become a Member

Family memberships pay for themselves in just 3 visits!

Join Today!

Know Before You Go

For the safety of our visitors and to preserve the structural integrity of our tree collection, climbing or sitting on the limbs of trees is not permitted. Thank you!

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Alerts & Updates

Out on a Limb will be closed for maintenance Tuesday, May 28th through Thursday, May 30th. Thanks for your patience!

The Arboretum is open as usual. Click here for hours.

Garden Railway trains are not running Saturday, September 8th and Sunday, September 9th due to inclement weather.

Please note: The Rose Garden is closed for maintenance every Thursday morning until noon.

Weather conditions may limit garden access to certain features even if the garden is open – please check the web site or call (215) 247-5777 for updates before visiting. Our visitors’ safety in the garden is our top priority. Therefore when inclement weather is predicted, we will make decisions about closing the garden accordingly.