PlantsQuercus→Blackjack Oak (Quercus marilandica)

Common names:
Give a thumbs up Blackjack Oak
Give a thumbs up Oak

Botanical names:
Quercus marilandica Accepted
Quercus marilandica var. ashei Synonym

General Plant Information (Edit)
Plant Habit: Tree
Life cycle: Perennial
Sun Requirements: Full Sun
Water Preferences: Mesic
Dry Mesic
Soil pH Preferences: Very strongly acid (4.5 – 5.0)
Strongly acid (5.1 – 5.5)
Moderately acid (5.6 – 6.0)
Slightly acid (6.1 – 6.5)
Minimum cold hardiness: Zone 5b -26.1 °C (-15 °F) to -23.3 °C (-10 °F)
Maximum recommended zone: Zone 8b
Plant Height: To 50 feet (15 m)
Plant Spread: 35 to 50 feet
Leaves: Good fall color
Fruit: Other: Biennial
Fruiting Time: Late summer or early fall
Flowers: Inconspicuous
Flower Time: Spring
Underground structures: Taproot
Suitable Locations: Beach Front
Uses: Shade Tree
Will Naturalize
Dynamic Accumulator: K (Potassium)
Wildlife Attractant: Birds
Resistances: Drought tolerant
Salt tolerant
Pollinators: Wind
Miscellaneous: Tolerates poor soil
Conservation status: Least Concern (LC)

Conservation status:
Conservation status: Least Concern

Photo gallery:

Posted by ILPARW (southeast Pennsylvania - Zone 6b) on Dec 11, 2017 8:33 PM

Oftentimes, it is a smaller scrubby oak tree about 20 to 30 feet high, but it can be a more stately tree to 5o feet high. Its native range is from southern New Jersey and southeast Pennsylvania down to northern Florida to east Texas & Oklahoma & Kansas, all Missouri, southeast Iowa to west central Illinois to southern Indiana and Ohio, growing in acid, sandy or dry upland soils. It is slow growing of about 1/2 to 1 foot/year and lives about 300 or more years. Its acorns are about 3/4 inch long that mature every two years. It develops a taproot so it is difficult to transplant. I've only seen a number of trees in the pine barrens of southern New Jersey where they all looked smaller and scrubby, but there is one tall, stately specimen at Jenkins Arboretum in southeast PA. Some native plant nurseries sell some in large pots.

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Discussion Threads about this plant
Thread Title Last Reply Replies
Is this a red oak? by mozart007 Nov 13, 2019 5:30 PM 9
What kind of Tree does this leaf belong to? by IJsbrandtGA Nov 17, 2016 2:28 PM 7
IDs and help please by Chantell Dec 5, 2016 7:20 PM 84
Oak tree in Texas #4 by wildflowers Oct 3, 2015 7:08 AM 23

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