Acer rubrum 'Bowhall' (Red maple 'Bowhall')

Botanical name

Acer rubrum 'Bowhall'

Other names

Red maple 'Bowhall', Scarlet maple 'Bowhall', Swamp maple 'Bowhall'

Genus

Acer Acer

Variety or Cultivar

'Bowhall' _ 'Bowhall' is a conical or broadly columnar, deciduous tree with ovate, three-lobed, dark green leaves turning scarlet in autumn. Dense clusters of red flowers in spring before the leaves emerge are followed by two-winged, red fruit.

Native to

Garden origin

Foliage

Deciduous

Habit

Broadly columnar, Conical

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Colour

Flower

Red in Spring

Foliage

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

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How to care

Watch out for

Specific pests

Aphids , Horse chestnut scale

Specific diseases

Verticillium wilt

General care

Pruning

Pruning group 1 from late autumn to midwinter only.

Propagation

Propagate by softwood cuttings or grafting. Only male flowers are produced so does not bear seed.

Propagation methods

Grafting

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Monthly care advice

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Where to grow

Acer rubrum 'Bowhall' (Red maple 'Bowhall') will reach a height of 15m and a spread of 8m after 20-50 years.

Suggested uses

Architectural, Low Maintenance, Foliage only, Specimen tree

Cultivation

Grow in rich, moist or moist but well-drained, acid soil in full sun or partial shade. Tolerates neutral soil and pollution.

Soil type

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

Soil drainage

Moist but well-drained, Moisture-retentive

Soil pH

Acid, Neutral

Light

Partial Shade, Full Sun

Aspect

North, South, East, West

Exposure

Sheltered

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

Hardy (H4)

USDA zones

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

Defra's Risk register #1

Plant name

Acer rubrum 'Bowhall' (Red maple 'Bowhall')

Common pest name

Apple root knot nematode

Scientific pest name

Meloidogyne mali

Type

Nematode

Current status in UK

Unknown

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

UK (along with certain other European countries) received potentially infested trees in 1992; but these were destroyed at the end of the trial period and targeted surveillance has failed to find any trace of the nematode. Main impacts are on elm; apple and mulberry and industry should source such material carefully.

Defra's Risk register #2

Plant name

Acer rubrum 'Bowhall' (Red maple 'Bowhall')

Common pest name

Alfalfa dwarf; Anaheim disease; California vine disease; Dwarf disease of alfalfa; Dwarf disease of lucerne; Leaf scald of oleander; Leaf scald of plum; Leaf scorch; Phony disease of peach; Pierce's disease of grapevine; Variegated chlorosis of citrus

Scientific pest name

Xylella fastidiosa subsp. multiplex

Type

Bacterium

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

A bacterial disease with a wide host range detected in Corsica. Although EU regulated; there remains some concern about the risk of introduction. This subspecies is known to be able to thrive in cooler climates. Should an outbreak occur; there would be a need for eradication action which would result in environmental and social impacts.

Defra's Risk register #3

Plant name

Acer rubrum 'Bowhall' (Red maple 'Bowhall')

Common pest name

Asian longhorn beetle; Starry sky beetle

Scientific pest name

Anoplophora glabripennis

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)

4

General biosecurity comments

Recognised threat to a wide range of deciduous tress native to the UK. Already regulated it is a priority for continued surveillance and statutory action. The risk of entry is further mitigated by EU legislation requiring the monitoring of wooden packaging material originating from China.

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/