Learn more about soil amendments and preparing soil for planting. Azaleas and rhododendrons have shallow root systems and need moist soil and mulch to keep them from drying out. Planting in Cold or Temperate Regions Zones 3 to 6 Plant in full sun to increase flowers and avoid mildew problems.
Shrubs need a minimum of 6 hours of full sun daily. Plant on the sheltered side of a windbreak. If subjected to cold, dry winds, their leaves and buds dry out and die. Planting in Warm or Hot Regions Zones 7 to 11 Plant in a site that receives afternoon shade, especially in hot areas. In tropical zones, azaleas will bloom in full shade. Space plants 2 to 6 feet apart, depending on their estimated mature size. Dig a hole as deep as the root ball and 2 times as wide.
Set new plants so that their top roots are at soil level or slightly below. If you plant them any deeper, the roots may rot. Fill the hole half full with soil, then water it well to settle the soil before filling with remainder of soil. A lack of water reduces flower-bud formation. In fact, this can keep the trunk too wet and encourage rot. Always leave a few inches around the trunk free of mulch.
Fertilize azaleas and rhododendrons sparingly and only when flower buds swell in the early spring, even if they are fall bloomers. Heavy applications of fertilizer will burn the plants.
Water plants during the summer if rainfall is less than 1 inch per week. After flowering, deadhead where practical, to promote vegetative growth rather than seed production. In regions with severe winters, wrap evergreen rhododendrons with burlap in the fall and apply extra mulch around the base of the shrub. Azaleas and rhododendrons may be transplanted at any time during the growing season, but they transplant most successfully during fall or early spring, when they are dormant and temperatures are cool.
The shrub should be well-branched, with four or more limbs close to the ground. Look for self-rooted plants; grafts are not desirable here. The native species are suitable in many areas. A variety with R.
The following tables contain the names of some of the species and hybrids that do well in South Carolina:. One of the hardiest native evergreen rhododendrons. Catawba rhododendron or purple laurel or mountain rosebay R. Considered by many to be the finest of all native American shrubs. Rhododendron growers know it for its extreme hardiness and as the parent of our most hardy hybrids.
Heat tolerant. Rosebay rhododendron or Great Laurel R. Flowers are smaller than Catawba rhododendron. Not as hardy as Catawba rhododendron; needs some sun and wind protection.
Use as a background shrub. Piedmont rhododendron. Flowers generally are bright lavender rose, although some are pale pink or salmon pink. Blooms late, a few weeks after Carolina rhododendron. Heat tolerant; requires plenty of shade. Use in wooded areas. Table 2. This information is supplied with the understanding that no discrimination is intended and no endorsement of brand names or registered trademarks by the Clemson University Cooperative Extension Service is implied, nor is any discrimination intended by the exclusion of products or manufacturers not named.
All recommendations are for South Carolina conditions and may not apply to other areas. Use pesticides only according to the directions on the label. All recommendations for pesticide use are for South Carolina only and were legal at the time of publication, but the status of registration and use patterns are subject to change by action of state and federal regulatory agencies. Follow all directions, precautions and restrictions that are listed. Join our mailing list to receive the latest updates from HGIC.
More Information » Close message window. Was this helpful? Yes No. What can we improve? Close comments window. What did you like most? Previous Rododendros. Next Flea Control. Related Posts. Search for:. Factsheet Number Search for factsheet by number. Pin It on Pinterest. Three to 6 feet tall after 10 years; similar or greater spread. Four to 6 feet tall at 10 years; usually wider than tall; varies from compact to loose growth.
Three to 5 feet tall at 10 years; broad, upright, rounded shrub. Four to 12 feet tall at 10 years; loose and open habit. Up to 8 feet tall after 10 years; a loose, upright plant. As I have stated I am new to Rhododendrons. Need all the help I can get on this. Some pruning now and then will take care of those that exceed their boundaries.
All mail order and Internet companies will advertise this type of information for each variety that they sell. There is no 'best' company or rhododendron as you might surmise. What one person likes, another can dislike so choose what you like instead. Some varieties do better based on light or moisture or etc conditions. However, many of those plants will probably be blooming which makes it great for picking specimens that you like photo colors on the Internet can be "off" sometimes.
Last suggestion: some cities have botanical gardens or arboretums which you can visit when plants are in bloom. Here is a link that might be useful: Rhododendron Nurseries. When you say "10 from foundation", do you mean inches, feet, or what?
If 10 inches, then go with something that doesn't need acidic soil. It is not a good idea to keep pruning a rhododendron to keep its size back. It is best to choose one that will be the correct size. The size quoted for a rhododendron is the size at 10 years of age. They keep on growing, but do not grow rapidly after 10 years of age. To get an idea of the best rhododendron varieties for your area visit the good doers page for Ohio at:.
Plant descriptions Elepidotes and Lepidotes. Here is a link that might be useful: How to grow rhododendrons and azaleas. Propagations sold may be bushy for years, but eventually a taller, narrower, more pointed top often emerges. I planted a magnolia from the Little Girl series near my house, but I planted it in a large pot, to restrain its growth. And the smallest and likely most popular selling rhodie is a PJM rhododendron. They are really popular and sell out fast.
Any plant that says "dwarf" means you have to prune it back. All plants will grow as big as they can get if you let them. I am a merciless pruner. I take pruning shears and whack them back as soon as they're done blooming. I may lose some flowers but I'm preventing a monster plant. I'd rather take that choice. I actually took a chain saw to a rose plant in the front yard that I didn't want anymore, and the doggone thing grew back and now it's full and flowering again.
I don't think it wanted to be taken out. Indem Sie weiterhin auf der Website surfen bzw. Mehr erfahren. Ultimate Lighting Sale. Bathroom Vanity Sale. Bestselling Chandeliers and Pendants. Sign In. Join as a Pro. Houzz TV. Houzz Research. Shop Featured Holiday Categories. Home Decor. Holiday Decor. Christmas Trees. Holiday Lighting. Gift Cards. I am new to Rhododendron and would like to know how tall and wide do they get? I am thing of ether planting a Magnolia or a Rhododendron on the Northwest Corner of my house.
Do they get 5 or 6 feet tall or taller? Email Save Comment 9. Featured Answer. Like 1 Save.
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