The Sizes of Stewartstonian Azaleas

Size and Height

• The Stewartsonian azalea grows between 4 and 5 feet high, with an accompanying spread between 4 and 5 feet. There are no dwarf versions. The azalea grows densely, making a good foundation plant around buildings or grouped together for woodland or shade gardens. It also may serve as a low, colorful hedge. Because of its coloring, it complements white and green companion plantings. Planting among evergreens including pine or spruce help protect azaleas, while also providing a good backdrop when they flower.

Blooms

• In North America, the Stewartsonian azalea blooms in early spring, from April to May, with flowers covering the entire shrub. The flowers consist of five petals in shades of deep scarlet to orange. As a semi-evergreen, it holds color even in winter, with leaves turning a dark purple, chocolate or burgundy shade. Due to the plant's shallow root system, provide plenty of mulch to keep the Stewartsonian azalea healthy.

Planting and Care

• Plant the Stewartsonian azalea in moist, well-drained soil. It tolerates partly sunny or partly shady conditions, but do not plant it where it receives direct afternoon sun or in a windy location. Use an acidic fertilizer on the shrubs in early spring and again in early summer. Do not fertilize them past this time frame, as you want the azaleas to harden off for cold weather. Make sure the azaleas receive adequate water in late summer and autumn, as lack of sufficient water can affect the following year's flower production.

History

• The Stewartsonian azalea is named for the Pennsylvania home town of its developer, Joseph Gable, who died in 1972. According to an article published in the Journal of the American Rhodendron Society, "the 'Stewartstonian' is probably the purest red of any azalea." Gable introduced approximately 35 evergreen azaleas and about the same number of rhododendrons, all bred for color and hardiness.