Lacebark elm

Sun

Full sun; tolerates light partial shade.

Water

Water regularly while establishing; moderately drought-tolerant once established, but benefits from deep watering during prolonged dry weather.

Soil

Adaptable to clay, loam or sand and acidic to alkaline soil, provided drainage is reasonable; avoid permanently waterlogged ground.

Height

40-60 ft (12-18 m)

Spread

35-50 ft (10.5-15 m)

Flowers

Late summer to early autumn; tiny, inconspicuous greenish flowers followed by flat, winged seeds.

Foliage

Small, glossy, dark green leaves with toothed edges; autumn colour ranges from yellow to reddish purple but can be muted. Deciduous in colder climates, sometimes semi-evergreen in mild ones.

Growth

Moderate to fast, especially when young.

Care needed

Medium

• Drought tolerant
• Heat tolerant
• Disease resistant
• Wildlife

Northern hemisphere months. In Australia, shift them by six.

Difficulty

Moderate

Toughness

Very tough

Pick your zone, country, light and whether you have pets.

1. Planting day

   7 ft (2 m)

2. After 1 year

   9 ft (2.8 m)

3. After 2 years

   12 ft (3.6 m)

4. After 3 years

   15 ft (4.4 m)

5. After 5 years

   20 ft (6.1 m)

About 16 years to full size.

From a typical nursery size, at an average rate for this kind of plant. A rule of thumb, not a forecast.

Cats and dogs

Safe

Invasive in

the US and Australia

In the garden

Spreads vigorously: plan to contain it.

Growth rate

Fast

• Water deeply through the first two growing seasons, allowing the upper soil to begin drying between waterings.
• Spread mulch 2-3 in (5-8 cm) deep over the root area, keeping it clear of the trunk.
• Do not fertilise routinely; feed only if soil testing or poor growth indicates a deficiency.
• Stake only if the root ball is unstable, and remove ties and stakes once roots hold it firmly, usually within a year.
• Remove unwanted seedlings while small, especially near drains, paving and natural areas.

Pruning. Train young trees during the locally recommended dormant-season elm-pruning window, selecting well-spaced main branches and removing competing leaders before they become large. Avoid topping and unnecessary large cuts; follow local restrictions intended to limit Dutch elm disease.

Autumn

Plant while soil is workable and moisture is reliable; in very cold regions, wait until spring.

Winter

Inspect branch structure and arrange formative pruning during the locally permitted elm-pruning period.

Spring

Refresh mulch, check staking ties and pull seedlings before their roots become established.

Early summer

Inspect leaves for beetle feeding and branches for scale insects; identify the pest before treating.

Summer

Deep-water young trees during dry spells; water established trees if drought is prolonged.

Late autumn

Clear leaves from drains and paving, and check for new seedlings beneath the crown.

• Use as a broad-canopied shade tree over a large lawn or generous seating area.
• Position where the mottled trunk can be seen in winter, with low planting rather than dense shrubs around it.
• Plant in spacious urban gardens where tolerance of heat, soil compaction and air pollution is useful.
• Combine with woodland groundcovers beneath the outer canopy for a layered, lightly shaded garden.

Garden styles it suits: Urban city garden, Modern, Traditional, Japanese, Woodland and Winter interest.

Plant it with: Liriope, Epimedium, Autumn fern, Japanese forest grass, Hellebores and Daffodils.

Wildlife: Winged seeds provide food for some birds and small mammals, and the crown offers shelter and nesting sites. It is wind-pollinated and is not a significant nectar plant.

• Elm leaf beetles can skeletonise leaves: monitor in spring and summer, support tree health with appropriate watering, and seek locally approved treatment if defoliation is repeated or severe.
• Scale insects can cause honeydew, sooty mould and weak growth: confirm the species and time any approved treatment to its vulnerable crawler stage.
• Root decline in waterlogged soil causes yellowing and dieback: correct drainage where practical and avoid frequent, shallow irrigation.
• Narrow forks and competing stems can split as the crown enlarges: use early formative pruning and have large or damaged branches assessed by a qualified arborist.

Not known to be toxic to people, cats, dogs or horses. No part is recognised as a significant poisoning hazard, but the leaves, bark and seeds should not be treated as food or livestock feed.

Where it spreads. Can self-seed aggressively in warm climates. It is recognised as an environmental weed in parts of Queensland and New South Wales, Australia, and as invasive in parts of the southeastern United States. Check local guidance before planting near bushland, waterways or other natural areas.

• Siberian elm (Ulmus pumila)

  Siberian elm usually has rough, furrowed mature bark rather than colourful exfoliating patches, and flowers and sets seed in spring rather than late summer and autumn.

• Japanese zelkova (Zelkova serrata)

  Zelkova generally has larger, more sharply toothed leaves and small, unwinged fruits; lacebark elm produces flat, winged seeds.

Ulmus is the Latin name for elm, parvifolia means small-leaved, and lacebark refers to the patchwork pattern exposed as the bark flakes away.

Propagation. Grow the species from fresh seed, which may germinate soon after sowing. Named cultivars must be propagated vegetatively, usually by cuttings, budding or grafting, to retain their characteristics.

Accepted botanical name

Ulmus parvifolia

In the US and Canada

Introduced in Canada and the lower 48 states.

Native range

China North-Central, China South-Central, China Southeast, Japan, Korea, Nansei-shoto, Taiwan and Vietnam.

Measured

Soil pH 4.8 to 7. Average height 1200 cm.

Sources: GBIF (CC BY 4.0), USDA PLANTS and Trefle (CC BY 4.0). The care and design notes are LandscapeGPT's own.