Crataegus x lavalleei (Hybrid cockspur thorn)

Botanical name

Crataegus x lavalleei

Other names

Hybrid cockspur thorn, Lavallée's hawthorn, Crataegus x lavallei, Lavalle hawthorn

Genus

Crataegus Crataegus

Species

C. x lavalleei - C. x lavalleei is a dense, upright to rounded, deciduous tree or large shrub with thorny branches bearing glossy, oval, toothed, dark green leaves turning red in autumn and erect clusters of white flowers in late spring and early summer followed by orange-red fruit.

Native to

Garden origin

Foliage

Deciduous

Habit

Rounded, Dense, Upright

Toxicity

The fruit can cause mild stomach upset if ingested.

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Colour

Flower

White in Spring

Foliage

Dark-green in Spring; Dark-green in Summer; Red in Autumn

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How to care

Watch out for

Specific pests

Aphids , Caterpillars , Gall mites

Specific diseases

Fireblight , Leaf spot

General care

Pruning

Pruning group 1

Propagation methods

Grafting, Seed

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Monthly care advice

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Where to grow

Crataegus x lavalleei (Hybrid cockspur thorn) will reach a height of 8m and a spread of 6m after 20-50 Years.

Suggested uses

Cottage/Informal, Wildflower, Wildlife

Cultivation

Grow in any soil except waterlogged in sun or partial shade.

Soil type

Chalky, Clay, Loamy, Sandy (will tolerate most soil types)

Soil drainage

Moist but well-drained, Well-drained

Soil pH

Acid, Alkaline, Neutral

Light

Partial Shade, Full Sun

Aspect

North, South, East, West

Exposure

Exposed, Sheltered

UK hardiness Note: We are working to update our ratings. Thanks for your patience.

Hardy (H4)

USDA zones

Zone 9, Zone 8, Zone 7, Zone 6, Zone 5, Zone 4

Defra's Risk register #1

Plant name

Crataegus x lavalleei (Hybrid cockspur thorn)

Common pest name

grape ground pearl

Scientific pest name

Margarodes vitis

Type

Insect

Current status in UK

Absent

Likelihood to spread to UK (1 is very low - 5 is very high)

2

Impact (1 is very low - 5 is very high)

5

General biosecurity comments

Main pathway; Vitis spp. plants for planting; already prohibited. However; further consideration of other pathways is required.

Defra's Risk register #2

Plant name

Crataegus x lavalleei (Hybrid cockspur thorn)

Common pest name

Round headed apple tree borer

Scientific pest name

Saperda candida

Type

Insect

Current status in UK

Absent

Likelihood to spread to UK (1 is very low - 5 is very high)

3

Impact (1 is very low - 5 is very high)

4

General biosecurity comments

American wood boring beetle; single European incursion into a German Island in the Baltic; limited likelihood of introduction into the UK due to small volume of trade and import inspections. Possible EU listing will limit risk further.

Defra's Risk register #3

Plant name

Crataegus x lavalleei (Hybrid cockspur thorn)

Common pest name

Cedar-Quince rust; Quince rust; Rust of apple; Rust of juniper; Rust of quince

Scientific pest name

Gymnosporangium clavipes

Type

Fungus

Current status in UK

Absent

Likelihood to spread to UK (1 is very low - 5 is very high)

2

Impact (1 is very low - 5 is very high)

4

General biosecurity comments

EU regulated rust disease which helps mitigate against introduction. A review of EU regulations will help to ensure that all hosts are regulated.

About this section

Our plants are under greater threat than ever before. There is increasing movement of plants and other material traded from an increasing variety of sources. This increases the chances of exotic pests arriving with imported goods and travellers, as well as by natural means. Shoot is working with Defra to help members to do their part in preventing the introduction and spread of invasive risks.

Traveling or importing plants? Please read "Don't risk it" advice here

Suspected outbreak? Click here for contact details to report to the relevant authority.

Date updated: 7^th March 2019 For more information visit: https://planthealthportal.defra.gov.uk/