Fraxinus pennsylvanica
American ash, Canadian ash, Green ash, Red American ash, Red ash , White ash
Fraxinus Fraxinus
F. pennsylvanica - F. pennsylvanica is a vigorous, spreading, deciduous tree with pinnate leaves divided into five to nine, ovate to lance-shaped, pointed, olive-green leaflets turning yellow in autumn. Clusters of small, purple flowers in spring are followed on female trees by slender, winged, green fruit ripening brown.
Fraxinus pennsylvanica is: Deciduous
Spreading
Purple in Spring
Olive green in Spring; Olive green in Summer; Yellow in Autumn
Generally pest-free
Ash dieback.
Pruning group 1
Tends to self-seed freely in ideal growing conditions. Sow seed in autumn in an open frame. Can be sown in spring after chilling in a refrigerator for 2-3 months.
Seed, Grafting
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Fraxinus pennsylvanica (American ash) will reach a height of 20m and a spread of 20m after 20-50 years.
Low Maintenance, Foliage only, Coastal, Woodland
Grow in fertile, moist but well-drained, neutral to alkaline soil in full sun. Will tolerate a wide range of conditions. Autumn colour often varies considerably from year to year.
Chalky, Clay, Loamy, Sandy (will tolerate most soil types)
Moist but well-drained, Well-drained
Alkaline, Neutral
Full Sun
North, South, East, West
Exposed, Sheltered
Hardy (H4)
Fraxinus pennsylvanica
American ash, Canadian ash, Green ash, Red American ash, Red ash , White ash
Fraxinus Fraxinus
F. pennsylvanica - F. pennsylvanica is a vigorous, spreading, deciduous tree with pinnate leaves divided into five to nine, ovate to lance-shaped, pointed, olive-green leaflets turning yellow in autumn. Clusters of small, purple flowers in spring are followed on female trees by slender, winged, green fruit ripening brown.
Deciduous
Spreading
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Purple in Spring
Olive green in Spring; Olive green in Summer; Yellow in Autumn
Generally pest-free
Ash dieback.
Pruning group 1
Tends to self-seed freely in ideal growing conditions. Sow seed in autumn in an open frame. Can be sown in spring after chilling in a refrigerator for 2-3 months.
Seed, Grafting
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Fraxinus pennsylvanica (American ash) will reach a height of 20m and a spread of 20m after 20-50 years.
Low Maintenance, Foliage only, Coastal, Woodland
Grow in fertile, moist but well-drained, neutral to alkaline soil in full sun. Will tolerate a wide range of conditions. Autumn colour often varies considerably from year to year.
Chalky, Clay, Loamy, Sandy (will tolerate most soil types)
Moist but well-drained, Well-drained
Alkaline, Neutral
Full Sun
North, South, East, West
Exposed, Sheltered
Hardy (H4)
Zone 9, Zone 8, Zone 7, Zone 6, Zone 5, Zone 4, Zone 3
Fraxinus pennsylvanica (American ash)
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.
Fraxinus pennsylvanica (American ash)
Ash yellows
Candidatus Phytoplasma fraxini
Phytoplasma
Absent
2
4
Pathogen causing phytoplasma disease of certain tree species in the Americas. EU regulation already provides some mitigation against the risk of introduction; but could be further strengthened.
Fraxinus pennsylvanica (American ash)
Asian longhorn beetle; Starry sky beetle
Anoplophora glabripennis
Insect
Absent
2
4
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.
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, Well-drained | Tell us... |
Soil pH: | Alkaline, Neutral | Tell us... |
Light: | Full Sun | Tell us... |
Aspect: | North, South, East, West | Tell us... |
Exposure: | Exposed, Sheltered | Tell us... |
Hardiness: | Hardy (H4) | Tell us... |
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