Common Name: sweet gum
Native Range: Eastern United States, Mexico
Zone: 5 to 9
Height: 60.00 to 80.00 feet
Spread: 40.00 to 60.00 feet
Bloom Time: April to May
Bloom Description: Yellow-green
Sun: Full sun
Suggested Use: Shade Tree
Leaf: Fragrant, Good Fall
Tolerate: Rabbit, Deer, Clay Soil
Easily grown in average, medium moisture, well-drained soils in full sun. Intolerant of shade. Prefers deep, moist, fertile soils, but seems to tolerate a wide variety of soils. Avoid alkaline soils however. Trees are not reliably winter hardy in the northern areas of USDA Zone 5.
Sweet gum is a low-maintenance deciduous shade tree that is native from Connecticut to Florida and Missouri further south to Texas, Mexico and Central America. In Missouri, it typically occurs in moist low woods and along streams only in the far southeastern corner of the state (Steyermark). It typically grows to 60-80’ (less frequently to 120’) tall with a straight trunk. Habit is pyramidal in youth, but it gradually develops an oval-rounded crown as it matures. Glossy, long-stalked, deep green leaves (4-7” across) have toothed margins. Each leaf has 5-7 pointed, star-shaped lobes. Leaves are fragrant when bruised. Fall color at its best is a brilliant mixture of yellows, oranges, purples and reds. Branchlets may have distinctive corky ridges. Non-showy, monoecious, yellow-green flowers appear in spherical clusters in April-May. Female flowers give way to the infamous gum balls which are hard, spherical, bristly fruiting clusters to 1.5” diameter. Gum balls mature to dark brown and usually remain on the tree through the winter, but can create clean-up problems during the general period of December through April as the clusters fall to the ground. In pedestrian areas, fruiting clusters must be cleaned up because they not only create unsightly litter, but also create human safety problems (e.g., turning an ankle by inadvertently stepping on a cluster). See L. styraciflua ‘Rotundiloba’ for a fruitless cultivar of this magnificent tree. The common name of sweet gum refers to an aromatic balsam or gum that exudes from wounds to the tree. In further reference to this gum, the genus name basically means liquid amber and the specific epithet means flowing storax. This gum has been used in the past for a variety of purposes, including chewing gum, incense, perfumes, folk medicines and flavorings. Tree wood has been widely used for a number of applications including flooring, furniture and home interiors.
No serious insect or disease problems. Webworms, caterpillars, borers and scale may cause problems in some areas. Leaf spots, wood rot and bleeding necrosis may occur. Iron chlorosis may occur in alkaline soils.
Excellent shade, lawn or park tree. Must be planted in large area with room to grow. Fruit can cause litter problems that detract from using this tree as a street tree.