American Sweetgum
Also known as
Sweet Gum, Redgum, Star-leaved Gum, Sapgum, Liquidambar
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Get the appAbout American Sweetgum
Liquidambar styraciflua, commonly called American sweetgum, is a large, deciduous tree prized for its star-shaped, palmately lobed leaves and spectacular autumn color ranging from gold and orange to crimson and deep purple. Native to eastern North America and parts of Mexico and Central America, it typically reaches 18–25 m (60–80 ft), occasionally exceeding 30 m (100 ft), with a strong central leader and a broadly pyramidal to oval crown. Leaves are glossy green, aromatic when crushed, and turn vibrantly in fall. Woody, spherical, spiny fruiting heads (“gumballs”) persist into winter and can create litter. Bark becomes gray-brown and deeply furrowed with age; younger twigs may bear corky wings. Sweetgum prefers deep, moist, well-drained, slightly acidic soils and full sun, but tolerates seasonal flooding and brief drought once established. Surface roots can become prominent in compacted or shallow soils. It is valued in urban and park plantings where space allows, and its wood is used for furniture and veneer; the aromatic resin has historical uses.
Taxonomy
Properties & Requirements
How to care for American Sweetgum
Water
Water deeply and infrequently, especially during the first 2–3 growing seasons, delivering 2.5–5 cm (1–2 in) of water per week via slow soaking at the root zone. Allow the top 5–8 cm (2–3 in) of soil to dry between waterings on well‑drained sites; reduce frequency on heavy clays to prevent waterlogging. Once established, sweetgum tolerates short dry spells but performs best with consistent moisture. A wide organic mulch ring helps conserve water, cool roots, and reduce competition from turf.
Light
Provide full sun (6–8+ hours daily) for best vigor, dense canopy, and the most intense fall color. Sweetgum tolerates light, open shade, but foliage color and form are superior in unobstructed sun. In hot, arid regions, ensure supplemental irrigation and mulch under full sun exposures to prevent leaf scorch. Avoid deep shade, which encourages sparse branching and muted fall color. Allow ample lateral space for canopy development away from buildings and overhead lines.
Nutrients
Sweetgum generally needs minimal fertilization if planted in decent soil. Base any feeding on a soil test. In early spring, apply a slow‑release, balanced fertilizer (e.g., 10‑10‑10 or similar) at the drip line, avoiding trunk contact. Maintain a 5–8 cm (2–3 in) organic mulch ring to recycle nutrients and moderate moisture. On alkaline soils, correct iron chlorosis with chelated iron and acidifying amendments (elemental sulfur or acidifying fertilizers). Avoid heavy late‑season nitrogen that can promote tender, frost‑susceptible growth.
Temperature
Hardy in USDA Zones 5–9, American sweetgum tolerates winter lows to about −26 °C (−15 °F) in suitable sites and summer heat above 38 °C (100 °F) with adequate soil moisture. Protect young trees from extreme reflected heat and desiccating winds. Avoid late‑season nitrogen that can delay hardening off in colder regions. In marginal climates, choose a sheltered site with deep, moisture‑retentive soil and maintain mulch to buffer root temperatures and reduce freeze–thaw stress.
