Magnolia virginiana var. australis
 
Tried and True Recommended by 2 Professionals
Common Name: swamp magnolia
Type: Tree
Family: Magnoliaceae
Zone: 5 to 10
Native Range: Eastern United States
Height: 15 to 60 feet
Spread: 15 to 60 feet
Bloom Time: May to August
Bloom Color: White
Bloom Description: White
Sun: Full sun to part shade
Water: Medium to wet
Maintenance: Low
Flowers: Showy Flowers, Fragrant Flowers
Leaves: Evergreen
Fruit: Showy Fruit
Other: Winter Interest
Tolerates: Wet Soil, Air Pollution
Uses: Flowering Tree, Rain Garden

Culture

Easily grown in acidic, medium to wet soils in full sun to part shade. Prefers moist, rich, organic soils, but, unlike most other magnolias, tolerates wet, boggy soils. Also tolerates shade. Appreciates a protected location in USDA Zone 5.

Noteworthy Characteristics

This sweet bay magnolia variety (sometimes commonly called southern sweet bay to distinguish it from the species) is a native of the Southeastern U.S. In the northern part of its cultivated range (including the St. Louis area), this variety typically grows either as a 15-20' tree with a spreading, rounded crown or as a shorter, dense, suckering, multi-stemmed shrub. In the deep South, this variety is typically more tree-like and grows much taller, sometimes to 60'. Features cup-shaped, sweetly fragrant (lemony), 9-12 petaled, creamy white flowers (2-4" diameter) which appear in mid-spring and continue sporadically throughout the summer. Oblong-lanceolate, shiny green foliage is silvery beneath. Foliage is evergreen in the South and semi-evergreen to deciduous in the St. Louis area. Cone-like fruits with bright red seeds mature in autumn and can be showy. In comparison to the species, the variety is usually taller, has more fragrant flowers and is more likely to be evergreen.

Plant of Merit

This sweet bay variety grows taller, has more fragrant flowers and is more likely to be evergreen than the species. It typically grows as a 15-20 foot tall tree or as a multi-stemmed shrub in the Midwest. Cup-shaped, sweetly-fragrant (lemony), creamy-white flowers appear in mid-spring and sometimes sporadically in summer. Cone-like fruits with bright red seeds attract birds in autumn. Shiny green leaves are silvery beneath and remain evergreen in mild winters. This is an excellent medium-sized flowering tree that appreciates a protected location.

Problems

No serious disease or insect problems. Susceptible to chlorosis in alkaline soils.

Garden Uses

Excellent specimen tree for the lawn or shrub border. Also effective in foundation plantings, near patios, terraces or on the periphery of woodland areas. Often planted in parks. Will grow in wet locations such as low spots or near ponds or streams.

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Magnolia virginiana