Family: Ericaceae

Scientific Name: Rhododendron calendulaceum

Common Name: Flame Azalea

DescriptionA native USA Rhododendron with a wide range of flower colors and hardiness to zone #5.
Plant TypeAll Plants, Shrubs Deciduous
Hardiness Zone5
Sunlightfull, mostly sunny, dappled shade
Moistureaverage, moist
Soil & Sitehumus-rich acidic soil (pH 4.5 to 5.5)
Temperaturedoes not like heat
Flowerslasts for over 2 weeks, color:orange, yellow, bicolor, reds, blends, etc
Dimensions4-8 by 4-8 feet (HS) or larger
Propagationsemi-ripe cuttings in late summer or autumn, layering
Native SiteAppalachian Mountains, eastern USA
Cultivar OriginWilliam Bartram was one of the first to describe this plant after seeing them growing on the hillsides in West Georgia (USA) in about 1774.
Misc FactsI have had success growing Rhododendrons by digging the hole 2 times larger than is needed. Taking the soil and mixing it 50-50 with peat moss. Plant it above grade to provide for good drainage. At planting time I give it a dose of soil sulfur. Always mulch the plant with organic mulch (preferably one that creates and acid soil conditions). This helps add organic matter to the soil as it rots and helps to maintain the soil moisture. Any pruning should be done after flowering.
Notes & Reference#01-Manual of Woody Landscape Plants (Michael Dirr), #220-The Illustrated Rhododendron (Pat Halliday)
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