Whitebeam

Sun

Full sun is best; tolerates light partial shade.

Water

Water regularly while establishing. Established trees tolerate moderate drought but grow better with occasional deep watering during prolonged dry spells.

Soil

Well-drained loam, clay or chalky soil; tolerates alkaline conditions and relatively poor ground. Avoid waterlogged sites.

Height

40-50 ft (12-15 m)

Spread

25-35 ft (7.5-10.5 m)

Flowers

Clusters of creamy-white flowers in late spring to early summer.

Foliage

Broad, oval green leaves with toothed edges, prominent veins and densely white-felted undersides; often yellow or russet in autumn.

Growth

Slow to moderate.

Care needed

Low

• Pollinators
• Drought tolerant
• Wildlife
• Low allergen

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

Difficulty

Easy

Toughness

Very tough

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

1. Planting day

   7 ft (2 m)

2. After 1 year

   8 ft (2.4 m)

3. After 2 years

   9 ft (2.9 m)

4. After 3 years

   11 ft (3.3 m)

5. After 5 years

   14 ft (4.2 m)

About 26 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

Toxic

Invasive in

Australia

Growth rate

Slow

• Plant with the root flare at soil level and allow room for the mature crown.
• Water deeply during dry weather for the first two or three growing seasons.
• Spread 2-3 in (5-8 cm) of organic mulch over the root area, keeping it clear of the trunk.
• Stake only if the root ball moves in wind; check ties regularly and remove the stake once the tree is secure.
• Do not feed routinely; use a modest spring feed only where poor growth indicates a need.

Pruning. Prune lightly in winter while dormant, removing dead, damaged or crossing branches and establishing a clear framework while young. Avoid topping or heavy crown reduction.

Autumn

Plant container-grown trees while the soil is moist and workable; water thoroughly.

Late autumn to winter

Plant bare-root trees during dormancy, avoiding frozen or waterlogged ground.

Winter

Remove damaged or crossing branches and check stakes and ties.

Spring

Renew mulch, keeping it away from the trunk, and check new growth for aphids or diseased shoots.

Summer

Deep-water young trees during dry spells and check that ties are not cutting into the bark.

Autumn

Leave sound fruits for birds; remove fallen leaves if leaf disease has been troublesome.

• Use as a lawn specimen where its rounded crown and silver-backed leaves can be seen from several directions.
• Plant along a broad drive or garden boundary, allowing enough space for the mature canopy.
• Combine with hawthorn, hazel and field maple in an informal tree belt or tall boundary planting.
• Underplant with spring bulbs and shade-tolerant perennials for interest before the canopy fills out.

Garden styles it suits: English country, Traditional, Woodland, Wildlife garden, Low-maintenance and Grand estate.

Plant it with: Hawthorn, Hazel, Field maple, Snowdrops, Hardy geraniums and Hellebores.

Wildlife: Flowers provide pollen and nectar for insects. Birds eat the autumn fruits and may spread the seeds; the crown also provides shelter and nesting sites.

• Fire blight can blacken flowers and shoots, sometimes leaving hooked shoot tips. Cut affected growth well back into healthy wood in dry weather, disinfect tools between cuts and seek local advice if the main trunk is affected.
• Aphids may curl young leaves and leave sticky honeydew. Tolerate light attacks and encourage natural predators; wash reachable colonies off with water.
• Leaf spots or scab may mark leaves and cause early leaf fall. Collect affected fallen leaves and avoid wetting the foliage when watering.
• Poor drainage can cause weak growth and root decline. Choose a freely drained site rather than trying to correct persistent waterlogging with extra feeding.

The fruit flesh is not generally regarded as highly poisonous, but raw fruit can cause stomach upset. Seeds contain cyanogenic compounds and should not be chewed or eaten in quantity. Keep people, dogs, cats and horses from eating quantities of fruit or seeds; species-specific toxicity information for pets and horses is limited.

Where it spreads. Naturalised in Victoria, Australia, where it has been reported as an environmental weed. Birds can carry its seeds into nearby vegetation; check local guidance before planting near bushland.

• Swedish whitebeam (Sorbus intermedia)

  Its leaves have distinct shallow lobes, especially toward the base; whitebeam leaves are generally unlobed with toothed margins.

• Wild service tree (Sorbus torminalis)

  Its leaves are sharply lobed and lack whitebeam's dense white felt beneath; its ripe fruits are brown rather than orange-red.

• Rowan (Sorbus aucuparia)

  Rowan has compound leaves divided into many separate leaflets, whereas whitebeam has simple, undivided leaves.

Whitebeam refers to the white leaf undersides, with 'beam' coming from an Old English word for tree.

Propagation. Sow cleaned seed outdoors in autumn and allow natural winter chilling; germination can be slow and may take more than one season. Named selections are usually grafted because seedlings do not reliably reproduce their characteristics.

Accepted botanical name

Sorbus aria

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