Rhododendron 'Delaware Valley White'
Common name: 
Delaware Valley White Azalea
Native to (or naturalized in) Oregon: 
  • Broadleaf evergreen shrub, may reach 4 ft ( 1.2 m) in 10 years, compact, spreading.   Leaves large medium green, may turn yellow in fall.  (It is unclear when the green color returns; note the yellowish foliage in the preceding pictures which were taken in April.)  Flowers white, 6 cm, mostly single some semi-double, unmarked, 10 stamens.
  • 0°F, sometimes listed as hardy to USDA Zone 6 (0° to –10° F);  early-mid (April-May).
  • A mucronatum hybrid: This cultivated hybrid azalea was grown in Japanese gardens over 300 years ago, but is not found in the wild.  Commonly called 'Indica Alba' or 'Ledifolia Alba', it was introduced from China into England in 1819.  The hybridizer of ‘Delaware Valley White’ is unknown.  It is sometimes listed as a Glenn Dale azalea, however, it does not appear in the corrected list of Glenn Dale Azaleas published by Galle (1985, p. 235-251).
  • Silverton, Oregon: The Oregon Garden.
Click image to enlarge
  • plant habit, flowering

    plant habit, flowering

  • flowers and leaves

    flowers and leaves