How to grow a sweet gum tree

❚ All products were chosen independently by our editorial team. This review contains affiliate links and we may receive a commission for purchases made. Please read our affiliates FAQ page to find out more.

Sweet gum trees are native to North America, where they're often found growing in swampy regions. A Spanish naturalist 'discovered' sweet gum trees in the early 16th century and described their aromatic gum as 'liquid amber' – hence the Latin name, Liquidambar styraciflua.

As a sweet gum can eventually reach 25m tall and 8m wide, it's best grown in a large garden, although more slender and compact varieties are available. Grow as a standalone tree in a lawn so its vibrant autumn colours can be appreciated.

How to grow sweet gum

For the best autumn colour, grow Liquidambar styraciflua in full sun, in rich, damp soil. Sweet gum does not grow well on alkaline soil but does well on acid soil. Grow it in a sheltered spot as wind can snap the branches. It does not need pruning but dead or crossing branches can be removed in winter.

Where to grow a sweet gum tree

Sweetgum tree with autumn leaves in Hampstead Heath, London — Sweetgum tree beginning to change colour in autumn. Getty Images

For the best autumn colour, grow a gum tree in full sun, in rich, damp, neutral to acidic soil. Avoid windy spots as wind can snap the branches. As it can eventually reach 25m tall and 8m wide, this is not a tree for a small garden, but you may fit a compact cultivar (see below) into a smaller garden.

How to plant a sweet gum tree

Liquidamber leaves and seed balls. Getty Images — Sweetgum foliage. Getty Images

Liquidambar tree is best planted in winter, when dormant.

Stand the tree in water to ensure its roots are damp
Dig a square hole that’s slightly wider than the pot your tree is in, but no deeper. Lightly fork the base and sides of the hole to ensure the soil isn’t compacted
Remove the pot from container-grown trees and any wrapping from bare-root ones. Tease out and unwind any circling roots. Stand the tree in the planting hole, then lay a cane across the hole to check that the top of the rootball is level with the soil surface
Backfill around the rootball with the excavated soil, shaking the tree a little to help the soil settle around the roots. Use your heel to firm gently all around the rootball and ensure there is good contact between the roots and the soil
Stake the tree to prevent windrock, which can tear the roots and create a gap around the base of the trunk that can fill with water and encourage rot. The stake should be about a third of the height of the tree, hammered in at a 45° angle. Attach the trunk to the stake using an adjustable tree tie
Water the tree thoroughly, then keep it watered during dry spells for at least the first year

Read our detailed guide to planting trees.

Where to buy a sweet gum tree online

Caring for a sweet gum tree

Red and Yellow Fall Leaves — Sweet gum leaves in autumn. Getty Images

Liquidambar tree does not need pruning but you could remove dead, diseased or crossing branches while the tree is dormant, from November to March. If your tree is too large, you could try pruning it back by one third – a job best left to a tree surgeon.

Growing a sweet gum tree: problem solving

The sweet gum tree is rarely affected by pests or diseases. It may be affected by honey fungus.

Advice on buying sweet gum

Check that you have the right spot to grow a sweet gum tree – it needs neutral to acid soil and full sun
Check that you have enough room to grow a sweet gum – many can grow up to 25m tall, although more slender and compact varieties are available
Buy from a specialist tree retailer

Where to buy a sweet gum tree online

Best varieties of sweet gum tree to grow

Liquidambar styraciflua 'Lane Roberts'

Hilliers Autumn (2nd October 2014) — Liquidambar styraciflua 'Lane Roberts'

Liquidambar styraciflua ‘Lane Roberts’ is one of the most well known sweet gum cultivars available. Its leaves turn a fantastic, rich blackish-red in autumn. This cultivar has the prestigious RHS Award of Garden Merit. Height x Spread: 25m x 8m

Liquidambar styraciflua 'Worplesdon'

Liquidambar styraciflua 'Worplesdon' is a selected variety of sweet gum chosen for its particularly good autumn foliage. This cultivar has the prestigious RHS Award of Garden Merit. Height x Spread: 25m x 12m

Liquidambar styraciflua 'Thea'

Similar to 'Lane Roberts' but with a more pyramidal habit. Crimson and purple autumn foliage. H x S: 25m x 12m

Liquidambar styraciflua 'Slender Silhouette'

As its name suggests, this tree has a narrow profile – while it still reaches a height of 18m it only reaches 2m wide. The foliage turns shades of orange and crimson in autumn. This cultivar has the prestigious RHS Award of Garden Merit. H x S: 18m x 2m