Callery pear

Sun

Full sun for the best flowering and autumn colour.

Water

Moderate while establishing; tolerates some drought once established, but benefits from deep watering during prolonged dry weather.

Soil

Adaptable to clay, loam and sandy soils, including compacted urban ground; prefers reasonable drainage and tolerates acidic to alkaline conditions.

Height

30-50 ft (9-15 m)

Spread

20-35 ft (6-11 m)

Flowers

Early to mid-spring: clusters of white flowers, often before the leaves expand; their strong smell is unpleasant to many people.

Foliage

Glossy, broadly oval, dark green leaves with finely toothed margins; autumn colour ranges from yellow and orange to red and purple, depending on climate and cultivar.

Growth

Fast when young, slowing with maturity.

Care needed

High

• Pollinators
• Drought tolerant
• Heat tolerant
• Wildlife
• Low allergen

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

Difficulty

Hard

Toughness

Fairly tough

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

1. Planting day

   7 ft (2 m)

2. After 1 year

   8 ft (2.5 m)

3. After 2 years

   10 ft (3 m)

4. After 3 years

   11 ft (3.5 m)

5. After 5 years

   15 ft (4.5 m)

About 20 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

the US and Australia

In the garden

Spreads vigorously: plan to contain it.

Growth rate

Moderate

• Check local invasive-plant guidance and sale restrictions before planting; choose another tree where Callery pear is invasive.
• Water newly planted trees deeply through their first two growing seasons, allowing the soil surface to dry slightly between soakings.
• Keep a 2-3 in (5-8 cm) layer of mulch over the root zone, clear of the trunk.
• Avoid routine fertiliser unless a soil test identifies a deficiency; excessive feeding encourages weak, rapid growth.
• Remove root suckers and volunteer seedlings promptly; shoots from below a graft can become thorny.
• Have large trees with tight forks, cracks or storm damage assessed by a qualified arborist.

Pruning. Prune young trees during dry weather in late winter to develop one main leader and well-spaced branches, removing competing upright stems gradually. Never top the tree; leave large limbs, split forks and major corrective work to a qualified arborist.

Late winter

Inspect branch unions and carry out light formative pruning on young trees.

Spring

Refresh mulch without covering the root flare, and check for seedlings beneath the canopy and nearby hedges.

Late spring

Watch for blackened blossom and shoot tips that may indicate fire blight; seek local advice before pruning suspected infections.

Summer

Deep-water young trees during dry spells and remove suckers below the graft.

Autumn

Clear fallen fruit from paths and remove volunteer seedlings before they establish.

Winter

Inspect after storms for cracked forks, hanging branches and changes in the tree's lean.

• Historically used in avenues and formal rows for repeated spring blossom; choose a non-invasive alternative where it escapes cultivation.
• Narrow cultivars provide upright accents beside broad buildings, although mature width and branch safety still need consideration.
• Existing specimens can provide autumn colour above low grasses and herbaceous planting.
• White blossom contrasts with evergreen hedges, but the flower smell makes placement beside seating areas undesirable.

Garden styles it suits: Formal, Urban city garden, Traditional, Architectural minimal, White garden and Autumn colour.

Plant it with: Daffodils, Hellebores, Hardy geraniums, Epimediums, Japanese forest grass and Autumn moor grass.

Wildlife: Flowers attract visiting insects, and birds eat the small fruits. Birds also disperse the seeds into grassland, roadsides and woodland edges, where dense, sometimes thorny growth can displace native vegetation.

• Weak forks and storm breakage: develop a sound framework while young; have mature trees inspected and consider replacement where defects cannot be managed safely.
• Fire blight: blossom and shoots blacken and may curl at the tips; remove infected growth during suitable dry conditions using locally recommended sanitation practices, and avoid excessive nitrogen.
• Leaf spots and pear rust: remove fallen affected leaves and improve airflow; obtain a diagnosis if damage is severe or repeated.
• Suckers and self-sown seedlings: remove promptly, including their roots where practical; replacement may be the best option where seedlings spread beyond the garden.

Pear flesh is not generally considered poisonous to people, cats, dogs or horses. Seeds contain cyanogenic compounds and should not be deliberately eaten or fed to animals; a few accidentally swallowed whole seeds are unlikely to cause poisoning, but substantial quantities of chewed seeds may be dangerous. Small, hard fruits can also pose a choking risk, and some seedling trees have sharp thorns.

Where it spreads. Spreads aggressively across much of the eastern and central United States, especially the Southeast, Mid-Atlantic and Midwest; it is listed as invasive in many states, and sale or planting is prohibited in some. It also escapes cultivation in parts of southeastern Australia, including South Australia.

• Common pear (Pyrus communis)

  Usually develops much larger, recognisably pear-shaped edible fruit; Callery pear typically bears small, round, hard fruits. Leaves and blossom alone can be difficult to distinguish.

• Crab apple (Malus spp.)

  Often has pink flower buds and larger, more colourful fruits with a persistent star-shaped calyx at the tip; Callery pear usually has small brown fruits and particularly glossy leaves.

• Serviceberry (Amelanchier spp.)

  Has narrow, strap-like white petals rather than broad, rounded pear petals, and its fruits ripen red to purple in early summer.

Pyrus is the Latin name for pear, and calleryana honours Joseph-Marie Callery, a missionary and plant collector who worked in China.

Propagation. Named cultivars are usually grafted or budded onto pear rootstocks; seedlings do not come true and may be thorny. Do not propagate where the species is invasive or restricted.

Accepted botanical name

Pyrus calleryana

In the US and Canada

Introduced in the lower 48 states.

Native range

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

Measured

Soil pH 5 to 7.5. Average height 800 cm.

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