University of Illinois Extension
University of Illinois Extension - Selecting Shrubs for Your Home
http://www.urbanext.uiuc.edu/shrubselector
Carolina Rhododendron
Rhododendron carolinianum
Size:
Size: small
Small

Medium

Large
Exposure/ Light Requirements:
Full Shade required.
Full Shade
Full Sun not required.
Full Sun
Partial Sun/Shade required.
Partial Sun/Shade
Hardiness Zone: 6 - 7 
Mature Height: 3-6 Feet
Mature Width: 3-6 Feet
Features: Showy flowers (white, pink or rosy) in mid to late spring; mildly fragrant; leaves are evergreen and leathery; leaves do not change color in autumn, but can develop a purplish cast in winter in cold climates.
Culture: Partial to full shade; moist, well drained soil is best; needs acid soil.
Cultivars:

This species is used as a parent in hybrids such as the P.J.M.Hybrids.

Common groups of hybrid Rhododendrons

'Girard' Hybrids: This large group of azaleas includes both deciduous and evergreen cultivars. They vary in flower color and winter hardiness.

'Knapp Hill' Hybrids: the result of crosssing several species of Rhododendron. A large group including 'Knapp Hill', 'Exbury', 'Slocock' and 'Ilam' Hybrids. These azaleas are deciduous. Flower color depends on the cultivar selected. Mildew can be a problem with this group. hardy zone 5-7.

'Northern Lights' Hybrids: developed at University of Minnesota. These hybrids were selected for excellent cold hardiness (to -30 degrees). These azaleas are deciduous. Flower color depends on cultivar selected.

'P.J.M.' Hybrids: a group of hybrids that are known for their compact size (3-6 ffet) and their flower color (shades of lavender pink to mauve). These rhododendrons are evergreen, with the foliage taking on a purplish cast in winter. Hardy zone 5 to 7.

Mature Form: Rounded
Native To: United States
Soil Conditions:
Dry
Soil condition: Moist, Well-DrainedMoist, Well-Drained
Wet
Tolerance:
Alkaline Soil
Dry Sites
Salt
Soil Compaction
Wet Sites
Wind
Uses:
Barrier
Use for: Border.Border
Use for: Foundation.Foundation
Hedge
Massing
Naturalizing
Screen
Use for: Specimen.Specimen
Foliage Color: Green
 
Fall Foliage Color: Green
Purple
 
Additional Notes: For more information on rhododendrons visit the American Rhododendron Society website at www.rhododendron.org.

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