Wych elm.

At a glance

Care level

Moderate

Plant type

Deciduous tree

Light

Full sun to partial shade

Indoor light

Bright indirect

Water

Every 7 to 14 days

Mature size

30 to 40 meters

Growth rate

Medium

Hardiness

USDA 4 to 8

Bloom time

Early spring

Care

Keep the soil consistently moist but never waterlogged to ensure healthy growth. Watch for wilting or yellowing leaves, which can indicate issues with drainage or pests. Provide plenty of space for this tree to spread as it matures.

Watering

Keep the soil evenly moist, especially during dry spells.

Feeding

Apply a balanced fertilizer in early spring to support new growth.

Pruning

Remove dead or crossing branches during the dormant winter season.

Repotting

Repot only if grown in a container, ensuring you use a large enough vessel.

Soil

Deep, fertile, well drained soil

Soil pH

Neutral to slightly alkaline

Temperature

-35 to 30°C

Humidity

40 to 70%

Drought tolerance

Moderate

Lifespan

Long-lived, often exceeding 100 years.

Deer and rabbits

Moderate

Safety

People

The plant is not considered toxic to humans.

Children

There are no specific safety concerns for children, though the tree is far too large for small garden play.

Contact allergens

The rough, sandpaper-like texture of the leaves can cause minor skin irritation in sensitive individuals.

Airborne allergens

The wind-dispersed pollen is a common seasonal allergen for many people in early spring.

Edibility

The samaras are edible but are generally considered a survival food rather than a culinary staple.

How to identify it

• Large, rough, serrated dark green leaves
• Asymmetrical leaf bases
• Broad, spreading, rounded canopy
• Clusters of small, papery winged seeds

Height

20 to 40m

Spread

15 to 25m

Leaves

green, yellow, deciduous

Flowers

green, brown, 0.5 to 1cm

Fruit

green, tan, late spring

Problems to watch for

• Dutch Elm Disease · A devastating fungal infection spread by bark beetles that causes wilting and death.

Growing it

Propagation

seed, cuttings

When to plant

spring, autumn

Overwintering

No special protection is needed as it is fully hardy in its native range. Ensure the soil remains well-drained to prevent root rot during wet winters.

In containers

Not suitable for long-term container growth due to its massive size.

Plant shade-loving woodland perennials near the base to mimic the natural forest floor environment.

Grows well with

• English Ivy · It acts as a ground cover that thrives in the dappled shade beneath the canopy.
• Common Foxglove · It enjoys the woodland conditions and partial shade provided by the tree.

Similar species

• Field Elm · It shares a similar growth habit but has smaller, smoother leaves.

Science

Family

Ulmaceae

Genus

Ulmus

Order

Rosales

Class

Magnoliopsida

Native range

Europe and western Asia.

Conservation

The species is currently threatened in parts of its range due to Dutch Elm Disease.

It thrives in moist, fertile woodlands and is well adapted to cool, temperate climates.

Value to wildlife

larval host plant, nesting site

Pollinators

bees, butterflies

Uses

shade tree, park specimen, wildlife habitat

Taxonomy resolved against GBIF.

Questions people ask

Is this tree prone to Dutch Elm Disease?

Yes, it is highly susceptible to the fungus and requires careful monitoring.

How fast does it grow?

It is a moderately fast grower, especially when young and provided with deep, fertile soil.

Where the name comes from

The name glabra means smooth and refers to the bark, which stays smooth for many years on young trees, unlike the very rough leaves.

Good to know

• The wood is highly valued for its interlocking grain, which makes it resistant to splitting.
• It is one of the few elms native to northern Europe.
• The leaves are famously asymmetrical at the base.