Rhododendron ‘Cunningham’s White’ is an evergreen shrub from the Ericaceae family of plants. The leaves are dark green. It can grow to 4ft or 1.2m tall. This is a hybrid of Rhododendron caucasicum and Rhododendron ponticum.
The flowers are white and funnel-shaped. They start as light pinkish-purple buds and open to white flowers. Rhododendron ‘Cunningham’s White’ flowers in spring. It tolerates temperatures down to -15ºF or -26ºC.
How to grow Rhododendron ‘Cunningham’s White’:
Grow Rhododendron ‘Cunningham’s White’ in the sun or light shade. Shelter it from strong wind and cold. Plant it in humus-rich, fertile, acidic, moist but well-drained soil. Propagate by semi-ripe cuttings, layering, or grafting. Watch out for vine weevil, leafhopper, lace bug, aphids, caterpillars, powdery mildew, petal blight, honey fungus, or silver leaf.