Rhododendron hybrida ( Mary Helen Glenn Dale Azalea )
astray , open , evergreen plant azalea formulate chiefly for moth-eaten robustness along the mid - Atlantic states . Single , funnel - shaped , bloodless flowers with light-green - scandalmongering blotches , 2 inches wide . Flowers are borne in showy trusses of 1 to 4 per clump . Bloom fourth dimension is late April in warmer arena and as late as other June in cooler climates . Plant as you would any of the other azaleas : in high spirits and in well - drained , acidulous soil , racy with organic topic ....