General Plant Information (Edit)
Plant Habit: Tree
Life cycle: Perennial
Sun Requirements: Full Sun
Water Preferences: Mesic
Dry Mesic
Dry
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
Deciduous
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
Monoecious
Conservation status: Least Concern (LC)

Conservation status:
Conservation status: Least Concern
Image
Common names
  • Blackjack Oak
  • Oak
Botanical names
  • Accepted: Quercus marilandica
  • Synonym: Quercus marilandica var. ashei

Photo Gallery
Location: Fountain, Florida
Date: 2022-04-09
The  looms are also called catkins
Location: Nationale Plantentuin Meise (Brussels)
Date: 2018-10-10
Location: Northeastern, Texas
Date: 2020-03-30
Freshly emerged spring leaves
Location: Fountain, Florida
Date: 2022-04-09
Location: Fountain, Florida
Date: 2022-04-09
Location: Fountain, Florida
Date: 2022-04-09
Location: Nationale Plantentuin Meise (Brussels)
Date: 2018-10-10

Date: c. 1865
illustration [as Q. ferruginea] by P. J. Redouté from Michaux's
Location: MacArthur Lake-Fort Bragg reservation, North Carolina
Date: August 10, 2022
Blackjack oak #302. RAB page 381, 55-3-24; LHB page 331, 50-2-?,
Location: MacArthur Lake-Fort Bragg reservation, North Carolina
Date: August 10, 2022
Blackjack oak #302. RAB page 381, 55-3-24; LHB page 331, 50-2-?,
Location: southern New Jersey
Date: 2013-08-10
maturing tree in summer
Location: Calera, OK
Date: 2018-08-06
Location: Aberdeen, NC Pages Lake park
Date: April 4, 2023
Blackjack oak #302. RAB page 381, 55-3-24; LHB page 331, 50-2-?,
Location: Northeastern, Texas
Date: 2020-03-30
Taller than average tree for Blackjack oak
Location: MacArthur Lake-Fort Bragg reservation, North Carolina
Date: August 10, 2022
Blackjack oak #302. RAB page 381, 55-3-24; LHB page 331, 50-2-?,
Location: southern New Jersey
Date: 2014-08-09
maturing tree in summer
Photo by wildflowers
Location: southern New Jersey
Date: 2014-08-09
the summer leaves
Location: Botanical Graden Meise - Nationale Plantentuin Meise - Brussel
Date: 2017-09-27
Location: Botanical Graden Meise - Nationale Plantentuin Meise - Brussel
Location: Botanical Graden Meise - Nationale Plantentuin Meise - Brussel
Date: 2017-09-27
Location: Northeastern, Texas
Date: 2017-11-25
Location: Jenkins Arboretum in Berwyn, PA
Date: 2015-12-13
a brown leaf from big tree at arboretum
Photo by wildflowers
Location: southern New Jersey
Date: 2014-08-09
acorns
Photo by wildflowers
Photo by robertduval14
Location: Northeast Missouri
Date: 2019
Blackjack Oak yard specimen
Location: Elizabethan Gardens, Dare County, North Carolina | June, 2022
Date: 2022-06-12
Location: Jenkins Arboretum in Berwyn, PA
Date: 2015-12-13
large tree labeled at the arboretum
Photo by wildflowers
Comments:
  • Posted by ILPARW (southeast Pennsylvania - Zone 6b) on Dec 11, 2017 8:33 PM concerning plant:
    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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