Sweetgum, Red Gum, Liquid Amber 'Slender Silhouette'

Liquidambar styraciflua

Family: Hamamelidaceae
Genus: Liquidambar (lih-kwid-AM-bar) (Info)
Species: styraciflua (sty-rak-ee-FLOO-uh) (Info)
Cultivar: Slender Silhouette



Foliage Color:

Unknown - Tell us

Bloom Characteristics:

Unknown - Tell us

Water Requirements:

Average Water Needs; Water regularly; do not overwater

Where to Grow:

Unknown - Tell us


over 40 ft. (12 m)


8-10 ft. (2.4-3 m)

10-12 ft. (3-3.6 m)

12-15 ft. (3.6-4.7 m)


USDA Zone 5a: to -28.8 C (-20 F)

USDA Zone 5b: to -26.1 C (-15 F)

USDA Zone 6a: to -23.3 C (-10 F)

USDA Zone 6b: to -20.5 C (-5 F)

USDA Zone 7a: to -17.7 C (0 F)

USDA Zone 7b: to -14.9 C (5 F)

USDA Zone 8a: to -12.2 C (10 F)

USDA Zone 8b: to -9.4 C (15 F)

USDA Zone 9a: to -6.6 C (20 F)

USDA Zone 9b: to -3.8 C (25 F)

Sun Exposure:

Full Sun

Sun to Partial Shade



Bloom Color:

Pale Green

Bloom Time:

Late Spring/Early Summer




Good Fall Color

Other details:

Unknown - Tell us

Soil pH requirements:

5.6 to 6.0 (acidic)

6.1 to 6.5 (mildly acidic)

6.6 to 7.5 (neutral)

Patent Information:


Propagation Methods:

By grafting

By budding

Seed Collecting:

N/A: plant does not set seed, flowers are sterile, or plants will not come true from seed


This plant has been said to grow in the following regions:

Decatur, Georgia

Savannah, Georgia

Chicago, Illinois

Streator, Illinois

Winnetka, Illinois

Clermont, Kentucky

Georgetown, Kentucky

Lexington, Kentucky

Louisville, Kentucky (2 reports)

Acton, Massachusetts

Defiance, Ohio

Inman, South Carolina

Nashville, Tennessee

show all

Gardeners' Notes:


On Jul 2, 2014, sladeofsky from Louisville, KY (Zone 6b) wrote:

A favorite of mine. Not bothered by mildew, unlike the columnar oaks. It makes a formal vertical accent and is a great choice when there is little horizontal space, such as the postage stamp front gardens of brownstones. If you like your plants tall and skinny, this ones for you. It is narrower than most other fastigate trees. And it's a North American native to boot.


On Jan 16, 2009, HortTiger from Inman, SC wrote:

This is a great example of how variable seedlings of the same tree can be. The original tree was found near a pond in the middle of nowhere. Unfortunately the land owner recently cut down the parent tree and fell it into the pond for fish habitat. He apparently didn't know what he had!

Slender Silhouette is very narrow and rarely produces sweetgum balls. Even when it does produce, the canopy of this tree is so narrow that cleanup is very easy since the balls drop directly down. I have seen them planted in rows and they are truly unique in form and very beautiful.