Morris Arboretum

Morris Arboretum

Connecting people, plants, and place.

University of Pennsylvania

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Bloom Calendar May

What's in Bloom: May = Location


Japanese styrax
Near Seven Arches

Styrax japonica
(Japanese styrax)

This small tree produces fragrant blooms in late May.

Florida azalea
English Park

Rhododendron austrinum
(Florida azalea)

In early May the native azaleas burst with color all around the Arboretum.

American columbine Visitor Center

Aquilegia canadensis
(American columbine)

This popular woodland plant attracts hummingbirds in spring.


common pawpaw
Sculpture Garden

Asimina triloba
(common pawpaw)

This native plant has large edible fruit and is said to be deer resistant!

giant allium
Pennock Garden

Allium giganteum
(giant allium)

A perennial that adds height and color to the beds in May.

Souvenir de la Malmaison
Rose Garden

Rosa ‘Souvenir de la Malmaison’
(Souvenir de la Malmaison)

An antique bourbon rose that is one of many fragrant blooms in the rose garden.


What's in Bloom Year-round?




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Awakening the Senses

Enhance your Arboretum experience, either onsite or when planning a visit:

Arboretum Adventure

Arboretum Adventure, this family activity explores the grounds and shares plant science lessons along the way.

Collection Connection, search the Arboretum’s collection records to locate or learn about favorite plants.

Tours, choose from among a selection of guided pathways through the grounds.

Wi-Fi, connect with the Arboretum, or share photos on social media at hotspots located throughout the garden.


Supported By

The Pew Center for Arts and Heritage

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