Acer campestre 'William Caldwell'
Field maple 'William Caldwell', Hedge maple 'William Caldwell', Common elder 'William Caldwell', Dog oak 'William Caldwell', Maser tree 'William Caldwell', Master tree 'William Caldwell'
Acer Acer
'William Caldwell' _ 'William Caldwell' is a columnar, deciduous tree bearing palmate, dark-green leaves turning red and orange in autumn and upright clusters of small green flowers in spring followed by winged fruit.
Acer campestre 'William Caldwell' is: Deciduous
Broadly columnar
Insignificant or absent, Yellow-green in Spring
Variegated, Grey-green, Cream in Summer; Golden-yellow in Autumn
Aphids , Horse chestnut scale , Caterpillars Aphids , Horse chestnut scale , Caterpillars
Verticillium wilt , Coral spot , Honey fungus , Tar spot Verticillium wilt , Coral spot , Honey fungus , Tar spot
Pruning group 1. Prune in late autumn to midwinter only.
Grafting, Budding
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Acer campestre 'William Caldwell' (Field maple 'William Caldwell') will reach a height of 10m and a spread of 3m after 10-20 years.
Cottage/Informal, Coastal, City, Architectural, Foliage only, Low Maintenance
Grow in fertile, moist but well-drained soil in full sun or partial shade.
Chalky, Clay, Loamy, Sandy (will tolerate most soil types)
Moist but well-drained
Neutral
Partial Shade, Full Sun
North, South, East, West
Exposed
Hardy (H4)
Acer campestre 'William Caldwell'
Field maple 'William Caldwell', Hedge maple 'William Caldwell', Common elder 'William Caldwell', Dog oak 'William Caldwell', Maser tree 'William Caldwell', Master tree 'William Caldwell'
Acer Acer
'William Caldwell' _ 'William Caldwell' is a columnar, deciduous tree bearing palmate, dark-green leaves turning red and orange in autumn and upright clusters of small green flowers in spring followed by winged fruit.
Deciduous
Broadly columnar
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Insignificant or absent, Yellow-green in Spring
Variegated, Grey-green, Cream in Summer; Golden-yellow in Autumn
Aphids , Horse chestnut scale , Caterpillars
Verticillium wilt , Coral spot , Honey fungus , Tar spot
Pruning group 1. Prune in late autumn to midwinter only.
Grafting, Budding
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Acer campestre 'William Caldwell' (Field maple 'William Caldwell') will reach a height of 10m and a spread of 3m after 10-20 years.
Cottage/Informal, Coastal, City, Architectural, Foliage only, Low Maintenance
Grow in fertile, moist but well-drained soil in full sun or partial shade.
Chalky, Clay, Loamy, Sandy (will tolerate most soil types)
Moist but well-drained
Neutral
Partial Shade, Full Sun
North, South, East, West
Exposed
Hardy (H4)
Zone 8, Zone 7, Zone 6, Zone 5, Zone 4
Acer campestre 'William Caldwell' (Field maple 'William Caldwell')
Apple root knot nematode
Meloidogyne mali
Nematode
Unknown
3
4
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.
Acer campestre 'William Caldwell' (Field maple 'William Caldwell')
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
Xylella fastidiosa subsp. multiplex
Bacterium
Absent
3
4
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.
Acer campestre 'William Caldwell' (Field maple 'William Caldwell')
Hylesia nigricans
Insect
Absent
2
4
South American moth which could be damaging to broadleaf species if introduced to the UK; as well as having human health impacts. The main pathway is likely to be goods (including non-plant material) imported from South America and awareness raising with the main industry sectors is recommended.
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: 7th March 2019 For more information visit: https://planthealthportal.defra.gov.uk/
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This plant likes... | Garden match | |
Soil types: | Chalky, Clay, Loamy, Sandy (will tolerate most soil types) | Tell us... |
Soil drainage: | Moist but well-drained | Tell us... |
Soil pH: | Neutral | Tell us... |
Light: | Partial Shade, Full Sun | Tell us... |
Aspect: | North, South, East, West | Tell us... |
Exposure: | Exposed | Tell us... |
Hardiness: | Hardy (H4) | Tell us... |
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