Northern Pin Oak (Quercus ellipsoidalis)

Common names:
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Give a thumbs up Black oak
Give a thumbs up Hill's oak
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General Plant Information (Edit)
Plant Habit: Tree
Life cycle: Perennial
Sun Requirements: Full Sun
Water Preferences: Mesic
Dry Mesic
Dry
Soil pH Preferences: Slightly acid (6.1 – 6.5)
Neutral (6.6 – 7.3)
Minimum cold hardiness: Zone 3 -40 °C (-40 °F) to -37.2 °C (-35)
Maximum recommended zone: Zone 5b
Plant Height: 40 to 65 feet
Leaves: Good fall color
Deciduous
Fruiting Time: Late summer or early fall
Flowers: Inconspicuous
Flower Time: Spring
Underground structures: Taproot
Suitable Locations: Street Tree
Uses: Shade Tree
Dynamic Accumulator: K (Potassium)
Wildlife Attractant: Birds
Resistances: Drought tolerant
Pollinators: Wind
Miscellaneous: Tolerates poor soil
Monoecious

Image

Photo gallery:
Location: Oak Collection at Morton Arboretum in Lisle, ILDate: 2015-06-19another maturing planted tree
By ILPARW
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Location: Oak Collection at Morton Arboretum in Lisle, ILDate: 2015-06-19the summer leaves
By ILPARW
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Location: Oak Collection at Morton Arboretum in Lisle, ILDate: 2015-06-19the foliage
By ILPARW
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Location: Oak Collection at Morton Arboretum in Lisle, ILDate: 2015-06-19a maturing planted tree
By ILPARW
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Location: Oak Collection at Morton Arboretum in Lisle, ILDate: 2015-06-19trunk and lower crown
By ILPARW
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Comments:
Posted by ILPARW (southeast Pennsylvania - Zone 6b) on Dec 10, 2017 8:27 PM

The Northern Pin Oak or Hill's Oak is very similar in appearance to the very common Pin Oak. The former's leaves seem to be a little larger, less deeply lobed, and the pair of lobes just above the middle are longer than the others. Its acorns are about 1 inch long and are tapered in a deep scaly cup. It grows in upland sites on drier soils. It develops a taproot so it is difficult to transplant, so it could be carefully done in early spring B&B. Its native range is lower Michigan, northern Indiana, northern Illinois, northern Iowa, most of Wisconsin, and southeast to northcentral Minnesota. It grows about 1 foot/year and lives about 150 to 200 years. The advantage over Pin Oak is that it will grow in alkaline soils at least to 7.5 pH. So far, I've only seen two young specimens at Morton Arboretum, though Dr. Dirr in his manual reported some big ones about 80 feet high there somewhere; I'll have to find them in the future.

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Discussion Threads about this plant
Thread Title Last Reply Replies
Salt tolerant plants by eclayne Feb 8, 2013 9:39 PM 130

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