Rhododendron hybrida ( Beacon Glenn Dale Azalea )
Evergreen azalea grow chiefly for cold hardiness along the mid Atlantic States . Beacon has large , showy , funnel shape - shaped , scarlet flowers . Bloom time is tardy April in warm areas , and as late as former June where mood is cooler . Plant size range from tall and rangy to moo and compact . Plant as you would any of the other azaleas : high and in well - drained , acid soil , rich with constituent matter ....