Blue Ash (Fraxinus quadrangulata)

General Plant Information (Edit)
Plant Habit:Tree
Sun Requirements:Full Sun
Full Sun to Partial Shade
Water Preferences:Mesic
Soil pH Preferences:Moderately acid (5.6 – 6.0)
Slightly acid (6.1 – 6.5)
Neutral (6.6 – 7.3)
Slightly alkaline (7.4 – 7.8)
Moderately alkaline (7.9 – 8.4)
Minimum cold hardiness:Zone 5a -28.9 °C (-20 °F) to -26.1 °C (-15 °F)
Maximum recommended zone:Zone 7b
Plant Height:50 to 75 feet
Plant Spread:35 to 50 feet
Leaves:Deciduous
Fruiting Time:Late summer or early fall
Fall
Late fall or early winter
Flowers:Inconspicuous
Bloom Size:Under 1"
Flower Time:Spring
Suitable Locations:Street Tree
Uses:Shade Tree
Useful for timber production
Wildlife Attractant:Other Beneficial Insects
Resistances:Drought tolerant
Pollinators:Wind
Containers:Not suitable for containers
Miscellaneous:Monoecious
Conservation status:Vulnerable (VU)

Conservation status:
Conservation status: Vulnerable
looking up the trunk of a full-grown tree

Photo gallery:
Location: Glenwood Park in Batavia, IllinoisDate: July 2016looking up the trunk of a full-grown tree
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Location: Glenwood Park in Batavia, IllinoisDate: 2010-08-18full-grown tree
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Location: Hinsdale, IllinoisDate: October about 1995young planted tree with fall color
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Location: Morton Arboretum in Lisle, ILDate: early September 2017two maturing trees
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Location: Glenwood Park in Batavia, IllinoisDate: July 2016full-grown tree
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Location: Batavia, Illinois near Fox RiverDate: 2016-07-23the samaras, a dry fruit of a seed with a wing
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Location: Glenwood Park in Batavia, IllinoisDate: 2010-08-18the compound leaves
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Location: Glenwood Park in Batavia, IllinoisDate: 2010-08-18buds, twigs, and leaves
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Location: Morton Arboretum in Lisle, IL in Olive Family CollectionDate: 2017-09-05the samaras (dry fruit of a seed with a wing)
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Location: Glenwood Park in Batavia, IL near Route 25Date: 2010-08-18a section of an old trunk with old bark
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Location: Glenwood Park in Batavia, IllinoisDate: 2010-08-18section of a trunk with mature bark
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Comments:
Posted by ILPARW on Nov 10, 2017 9:08 PM

Blue Ash is not a common tree species. It is found in certain spots here and there in its native range of northern & central Illinois, most of Indiana, eastern Ohio, central Kentucky, central Tennessee, most of Missouri, and southeast Kansas. Its compound leaves are 7 to 14 inches long with 7 to 11 leaflets that have sharp teeth on the margin; leaves are dark green and lustrous above and develop a poor to average yellow fall color. It has square twigs where it gets its scientific species name of "quadrangulata." The common name comes from the mucilaginous substance in the inner bark that turns blue when exposed to the air. It usually is found growing in dry or well-drained alkaline soils derived from limestone, but it can also grow in draining wet soils that are acid, with a pH range of 6.5 to 8.5. It is fast growing in lowland sites about 2 feet/year, but medium in upland sites of about 1 to 1.5 feet/year, and lives about 100 to 150 years. It makes a good shade tree with an interesting texture and it is occasionally grown by larger or native nurseries. It has shown resistance to the Emerald Ash Borer, but we'll see whether that continues when the other ashes are depleted.

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Discussion Threads about this plant
Thread TitleLast ReplyReplies
Plant found on hugelkultur bed by scottmanJul 28, 2012 8:47 AM9

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