Legacy Project Page

Glenn Dale Azaleas

Azalea ‘Refrain’, Photo by Dan Krabill

Legacy Lead: Ronnie Palmer ⇐ Click to send Ronnie an email

Hybridizer: Ben Morrison

B. Y. Morrison, Director of the U.S. National Arboretum, began an ambitious hybridizing program in 1935, with the goal of developing azaleas with large blooms, cold hardy in the Washington DC area, and extending the blooming season from mid-May to mid-June. He named and registered 454 Glenn Dale cultivars, and released 440 of them beginning in 1941, with more in 1947-1949 and the last few in 1952. They range in height from 3 to 8 feet, and cover a wide range of colors, color variations, flower sizes, plant habits and bloom times.

A complete list of the Glenn Dale azaleas is shown on our Glenn Dale page. Most of the names are links to their images. The U.S. National Arboretum has a collection of Glenn Dale images here on their website.

Project Presentation: (None available at this time)

Project Attachments:

A Recollection of John Creech and Glenn Dale Dr. John M. Keshishian
Azaleas at the Glenn Dale Plant Introduction Station Richard T. West & William C. Miller III
Bloom Times by Mr. Rees
Parentage and bloom time John Brown
Plant Height & Growth Habit John Brown
The Glenn Dale Azaleas B. Y. Morrison
The Massed Glenn Dale Azaleas on Mt. Hamilton Richard T. West, William C. Miller III, Barbara L. Bullock
The Ten Oaks Glenn Dale Project Begins Richard T. West & William C. Miller III