Why are the fruits so messy?

The spiky, woody capsules drop in large quantities and can be difficult to walk on or rake.

Does it need a lot of water?

It prefers consistently moist, deep soil and does not tolerate prolonged drought well.

Plant guide

Sweetgum.

Liquidambar styraciflua

Pronounced lik-wid-AM-bar stir-uh-FLOO-uh

Also known as Alligator-wood, Alligatorwood, American Storax, American Sweet Gum, American-storax, Gumball Tree, Red-gum, Satin-walnut

Liquidambar styraciflua — Photo by Engers (CC BY) via gbif

The sweetgum is a stately deciduous tree known for its star shaped leaves that turn brilliant colors in autumn. It produces unique spiky fruit balls that persist on the branches through winter. This tree thrives in deep, moist soils and makes a wonderful shade tree for large landscapes.

At a glance

Care level: Easy
Plant type: Deciduous tree
Light: Full sun
Indoor light: Direct sun
Water: Every 7 to 14 days
Mature size: 20 to 35 meters
Growth rate: Fast
Hardiness: USDA 5 to 9
Bloom time: Mid to late spring

Care

Plant in a location with plenty of space to accommodate its large root system and mature canopy. Keep the soil consistently moist, especially during the first few years, to encourage strong growth. Watch for surface roots that may emerge as the tree ages.

Watering: Water deeply during dry spells to maintain soil moisture.
Feeding: Apply a balanced slow release fertilizer in early spring.
Pruning: Prune during the dormant winter season to remove dead or crossing branches.
Repotting: Repotting is only applicable for young container specimens.
Soil: Deep, fertile, moist, acidic soil
Soil pH: Acidic to neutral
Temperature: -28 to 35°C
Humidity: 40 to 80%
Drought tolerance: Moderate
Lifespan: Perennial, typically 50 to 150 years
Fragrance: Light
Deer and rabbits: Moderate

Safety

People: The plant is generally considered non-toxic, but the sap may cause mild skin irritation in sensitive individuals.
Pets: The fruit and leaves are generally considered non toxic, but the spiky balls can be a nuisance or choking hazard for pets.
Children: The spiky, woody fruit balls are sharp and can be a choking hazard or cause injury if stepped on or thrown.
Contact allergens: The spiky fruit capsules can cause minor skin abrasions if handled roughly.
Airborne allergens: The pollen can be a moderate trigger for those with seasonal allergies during the spring.
Edibility: The fruit is not edible and can be a nuisance due to its spiky texture.

How to identify it

Star shaped leaves with five lobes
Deeply furrowed gray brown bark
Spiky spherical woody fruit capsules
Brilliant red, orange, and purple fall color

Height: 18 to 35m
Spread: 10 to 15m
Leaves: green, yellow, orange, red, purple, deciduous
Flowers: green, yellow, 1 to 2cm
Fruit: brown, Autumn

Problems to watch for

ChlorosisCommon
Leaf ScorchCommon
Bleeding NecrosisUncommon
CankerUncommon
Root RotUncommon
WebwormsUncommon

By symptom

Plant problems by symptom

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Growing it

Propagation: seed, cuttings
When to plant: Spring, Autumn
Overwintering: No special winter protection is needed for established trees. A layer of mulch around the base helps retain soil moisture during dormant months.
In containers: Not suitable for long term container growth due to its massive size and extensive root system.

Seed

1. Collect the dry, spiky fruit capsules in late autumn.
2. Allow the capsules to open and release the small seeds.
3. Cold stratify the seeds in a refrigerator for 30 to 60 days.
4. Sow the seeds in a moist seed starting mix in early spring.
5. Keep the soil consistently damp until germination occurs.

Plant in areas with enough space for the roots to spread, as they can be aggressive near foundations.

Grows well with

Red Maple · They share similar moisture requirements and thrive in the same bottomland habitats.
River Birch · Both trees enjoy the moist, rich soils found near water sources.

Similar species

Oriental Sweetgum · A smaller, slower growing relative that is better suited for smaller gardens.

Science

Family: Altingiaceae
Genus: Liquidambar
Order: Saxifragales
Class: Magnoliopsida
Native range: Eastern North America and parts of Mexico and Central America.
Conservation: This species is widespread and not of conservation concern.

It thrives in bottomlands and floodplains where it can access deep, moist soil.

Value to wildlife: seeds provide food for birds, larval host plant for luna moths
Pollinators: bees, butterflies
Uses: ornamental shade tree, timber production, wildlife habitat

Through the year

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Flowering

Fruiting

Foliage

Ecological indicators

Salinity: 2/9
Light: 7/9
Soil reaction: 5/9
Temperature: 6/9
Moisture: 7/9
Nutrients: 6/9

Taxonomy resolved against GBIF.

Questions people ask

Why are the fruits so messy?: The spiky, woody capsules drop in large quantities and can be difficult to walk on or rake.
Does it need a lot of water?: It prefers consistently moist, deep soil and does not tolerate prolonged drought well.

Where the name comes from

The name Liquidambar refers to the liquid amber colored resin, while styraciflua means flowing with storax.

Good to know

The wood is often used for furniture and interior trim.
The star shaped leaves turn brilliant shades of red and purple in autumn.
It is one of the most important commercial timber trees in the southern United States.
The genus name comes from the Latin liquidus and Arabic ambar, referring to the fragrant resin.

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This guide was generated with AI on September 26, 2026 and checked against GBIF taxonomy. It is general information, not horticultural or veterinary advice. Read about how we build these guides.