Rhododendron ( Greenwood Orchid Greenwood Hybrid Azalea )
Bill Guttormsen of Canby , Oregon start breed the Greenwood loanblend in 1960 . The parentage includes Kurume , Glenn Dale , and Gable crossbreed . Compact , rounded , evergreen azalea that was developed to thrive in temperate climates and is unfearing to 0 degrees F. blossom are borne in showy truss from mid to late spring . Plant as you would any of the other azaleas : high and in well - enfeeble , acid grime , rich with constitutional matter ....