Rhododendron 'Ramapo'

‘Ramapo’ rhododendron is a very compact, woody, broadleaf evergreen shrub in the Ericaceae (blueberry) family. It typically grows 1 to 3 feet tall and 2 to 4 feet wide. The genus name derives from the Greek words rhodo, which means rose, and dendron, meaning tree.

‘Ramapo’ grows well in full sun to partial shade and prefers moist, well-drained, acidic soils. It does not tolerate dense clay, so if you have clay soil, amend with organic material. The roots may rot if soil does not drain well. Plant the root ball high in the soil to help with drainage issues. Avoid overwatering and over-fertilizing. Pruning, if desired, may be done after flowering. 

This beautiful dwarf rhododendron has fragrant leaves and large trusses of lovely purple spring flowers that provide a beautiful contrast to the green foliage and attract bees and hummingbirds. It is perfect for small gardens in cool, damp climates or planted in containers and used in interiorscapes.  This diminutive shrub is a terrific choice when a small accent plant with great presence is needed. It is equally well suited for a low hedge or planted in a woodland area. 

Insects, Diseases, and Other Plant Problems: Potential insect problems include aphids, borers, galls, lace bugs, scale, leafhoppers, mealy bugs, thrips, whiteflies, and mites. Disease problems include powdery mildew, blights, root rots, and leaf spots. 

While rhododendrons remain very popular for landscape use, many cultivars are susceptible to Phytophthora root rot—this leads to leaf loss, reduced vigor, branch dieback, and wilting. Implement good cultural practices first, such as improving drainage with organic matter or berms and avoiding overwatering or overfertilization. For suitable alternatives, see this video created by Charlotte Glen as part of the Plants, Pests, and Pathogens series.

VIDEO Created by Elizabeth Meyer for "Trees, Shrubs and Conifers" a plant identification course offered in partnership with Longwood Gardens.

More information on Rhododendron.