Formosa Sweetgum has a wide, pyramidal shape when young but eventually grows to a rounded or irregular form, reaching 40 to 60 feet in height with a 35 to 45-foot spread. Young specimens may vary in form and be somewhat irregular.
The large, three-lobed leaves, purplish-red when young, are dark green through the growing season and in fall turn a beautiful yellow-red color in the south or red in the north. Branches are covered with characteristic corky projections. Formosa Sweetgum makes a nice park, campus or residential shade tree for large properties.
Be careful when locating Formosa Sweetgum as a street tree since its large, aggressive roots may eventually lift curbs and sidewalks. Plant trees 8 to 10 feet or more away.
Prefers a moist but not swampy loam in a sunny sheltered position. Succeeds in light shade. Requires a deep fertile soil. Prefers a neutral to acid soil, growing poorly on shallow soils overlying chalk. Young plants are susceptible to frost damage and should be protected for their first few years. This species resents root disturbance, young plants should be pot-grown and be placed in their permanent positions as soon as possible.
Genus - Liquidambar
Species - Formosana
Common name - Formosan Gum
Pre-Treatment - Required
Hardiness zones - 6 - 9
Height - 60'-100' / 18 - 30(70) m
Spread - 20'-25' / 6 - 8(20) m
Plant type - Tree
Vegetation type - Deciduous
Exposure - Full Sun, Partial Sun
Growth rate - Medium
Soil PH - Acidic, Neutral
Soil type - Clay, Loam, Sand
Water requirements - Drought tolerant, average water
Landscape uses - This is a lovely shade tree for natural areas, large landscapes and parks
Bloom season - Late Spring, Early Summer
Leaf / Flower color - Green / Yellow green
1. Place seeds in moistened peat moss inside a plastic bag. Put the bag in the refrigerator or somewhere that temperatures remain +4C (40F) for 30 days.
2. Sow the seeds on the surface of the soil in a 10 cm (4") pot filled with potting soil. Press them down with your palm to make good contact with the soil. Water the pot and make certain it does not dry out.
Place the pot in a well-lit area that is at least 60 degrees Fahrenheit. Faster germination will occur in temperatures above +15C (60F).
3. Fertilize the seedlings with a half dilution of seaweed fertilizer every other time you water. Commence this feeding process as soon as the seedlings have their first pair of true leaves.
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