Count on Rhododendron cat. 'Nova Zembla' for dramatic late-spring color and year-round structure. You will get a broadleaf evergreen shrub with large trusses of rich red flowers and dark, leathery foliage that looks good well beyond bloom. At maturity it can reach about 84-108 inches tall, with a full, shrub-like habit that works in foundations, woodland edges, and mixed borders.
Give it acidic, humus-rich soil that drains well but does not dry out. You will have the best results in a spot with morning sun and afternoon shade, or dappled light; it also tolerates full sun in cooler climates. Keep the root zone evenly moist, especially during establishment, and mulch to protect the shallow roots and moderate soil temperature.
Plant with the top of the root ball slightly above surrounding grade, then water deeply and regularly until established. If your soil is heavy, consider raised planting to avoid waterlogged conditions. A light annual feeding for acid-loving plants can help, but avoid excessive fertilizer. Deadhead spent flower clusters after bloom if you want a tidier look and to encourage strong new growth.
In colder or windy sites, protect from drying winter winds and late-spring frosts. Prune only as needed, right after flowering, since buds for next year form soon after. With consistent moisture, shelter, and acidic soil, you will have a long-lived evergreen shrub that delivers dependable red blooms each spring.