Cultivation. Most varieties, but not all, will come back from even the most severe pruning. Is It Ok if I Cut Back Some Azalea Plants That Had Overgrown? The jaw-droppingly gorgeous White Catawba (Rhododendron catawbiense 'Album') is one of the easiest rhododendron varieties to grow. End your Rhododendron flowering season with Boursault Rhododendron (Rhododendron 'Catawbiense Boursault'). While it is a bush, Rhododendron bushes can grow up to 80 feet tall! Each blossom contains a yellow blotch, adding a nice contrasting touch. Tolerates a fair amount of sun in cool northern summers, but leaves may scorch in hot afternoon sun in the St. Louis area. Have tree and plant questions? Growing rhododendron successfully requires the proper planting spot for the rhododendron bush. Use the links in the index on the left to access various topics. To protect plants from winter winds, wrap a cylinder of fencing around plant and filled with leaves once the ground freezes. Makes an excellent foundation, hedge or mass planting. Plant in a location protected from strong winds. With thousands of varieties available, there's one to suit just about every garden. If you want to reshape the rhododendron, do some light pruning after blooming ends, selecting overgrown branches and clipping back to 1/4 inch above a cluster, or whorl, of leaves. An outsta The following menu has 3 levels. These bushes require little pruning, if any. Cultivation. These are simply flower factories in the late mid-season of Rhododendron flowering. Go to list of cultivars. Rhododendron catawbiense 'Grandiflorum' (H-1) Deciduous/ Evergreen: Evergreen: Growth Rate: Moderate: Special Feature: Easy Care, Extreme Cold Hardiness, Gift Plant, North American Native Selection, Tolerates Acidic Soil, Year-round Interest: Foliage Color: Green: Flower Attribute: Rhododendron catawbiense, commonly called Catawba rhododendron or mountain rosebay, is a large, rounded to spreading, multi-stemmed, broadleaf evergreen shrub that typically grows to 6-10’ (rarely to 20’) tall. Suggested uses. Do not site plants within or near the drip line of trees in the walnut famil… Stop by, email, or call. When Andrew Jackson was in the White House and Earl Grey was the Prime Minister of the U.K., this celebrated evergreen Accent was introduced. Rhododendron 'Catawbiense Grandiflorum' (Rhododendron 'Catawbiense Grandiflorum') will reach a height of 3m and a spread of 3m after 10-20 years. A Rhododendron bush, is a popular flowering bush and foundation plant, with bright spring blooms. Provide well-drained, acidic soil, rich in organic matter. Performs well with some morning sun but needs shady afternoon conditions. Deadheading not necessary but can be snipped off carefully after blooming. Lilac-magenta flowers late in the season²; 14 to 20 blooms in a rounded truss. The Morton Arboretum is a 501(c)(3) nonprofit that relies on the generosity of members and donors. Use up and down arrow keys to explore within a submenu. Rhododendron catawbiense 'Lord Roberts' (Rhododendron 'Lord Roberts') will reach a height of 2.5m and a spread of 2.5m after 10-20 years. The Care of Rhododendrons. Plant in moist, … The Catawba Rhododendron is native from Virginia to Georgia in the Smoky Mountains. Corolla has yellow to brown markings inside. Borers, scales and lace bugs can also become a problem on some stressed rhododendrons. Fertilize only after blooming to avoid encouraging excessive foliage growth to the detriment of the blooms. Cottage/Informal, City, Beds and borders, Banks and Slopes. Morning light is the only direct sunlight your plant should receive. Native to southeastern United States. Rhododendrons are closely related to Azaleas. Considered by … use escape to move to top level menu parent. Soil preparation is best accomplished in autumn before planting the rhododendron in spring. Excellent for shade gardens or in a sheltered site. RHODODENDRON 'Catawbiense Boursault'( Catawbiense Group) Plant Common Name. Thrives in cooler regions but benefits from protection from winter winds. Rhododendrons can be irrigated from above as well, but do so in the morning to avoid fungal infections caused by prolonged exposure to moisture. If you plan to reshape more drastically, wait until winter and cut back to 1/2 inch above a bud. Requires well-drained, acidic soils. Rhododendron catawbiense. Plants perform well on north or east facing slopes. Our communities. Catawba Rhododendron are particularly hardy compared to other Rhododendrons and are often referred to as "Iron Clad Rhododendron." Get expert help from The Morton Arboretum Plant Clinic. Botryosphaeria canker can also become a problem, girdling the stems and causing dieback. How to Grow and Care for Rhododendrons Genus: Rhododendron. Learn how simple Rhododendron care actually is with these easy tips on how to grow beautiful Azalea and Rhododendron bushes. Native R. catawbiense, ‘ Nova Zembla ’ Red Pink 5′ shade tolerant evergreen shrub, shrub... To grow and care of rhododendrons and are often referred to as `` Iron Clad.. Think it may be getting direct afternoon sunlight can grow up to 80 feet tall x ‘ Nova Zembla Red., and learn more about the plants in our living collections by our. Canker can also become a problem, girdling the stems and causing dieback Wallside and trellises in high pH.! 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