General Plant Information (Edit)
Plant Habit: Tree
Life cycle: Perennial
Sun Requirements: Full Sun
Full Sun to Partial Shade
Water Preferences: Wet
Wet Mesic
Mesic
Minimum cold hardiness: Zone 5a -28.9 °C (-20 °F) to -26.1 °C (-15 °F)
Maximum recommended zone: Zone 9b
Plant Height: 50 to 100 feet (15-30m)
Plant Spread: 30 to 50 feet (9-15m)
Leaves: Good fall color
Deciduous
Fruit: Other: small acorns
Fruiting Time: Late summer or early fall
Fall
Flowers: Showy
Flower Color: Green
Yellow
Other: Pendant, yellow-green catkins
Bloom Size: Under 1"
Flower Time: Spring
Suitable Locations: Street Tree
Uses: Shade Tree
Edible Parts: Fruit
Dynamic Accumulator: K (Potassium)
Resistances: Humidity tolerant
Salt tolerant
Propagation: Seeds: Stratify seeds: at 40 degrees F for 30 to 60 days
Sow in situ
Pollinators: Wind
Containers: Not suitable for containers
Miscellaneous: Monoecious
Conservation status: Least Concern (LC)

Conservation status:
Conservation status: Least Concern
Image
Common names
  • Willow Oak
  • Oak

Photo Gallery
Location: Southside Park, Sacramento CA.
Date: 2017-12-08
I always wonder what all is in there that people have tossed in.
Location: Southside Park, Sacramento CA.
Date: 2018-11-13
A very beautiful spread of roots. Growing near a pond so it’s b
Location: Southern Pines, NC
Date: April 5, 2023
Willow oak #417; RAB p. 385, 55-3-30; AG p. 479, 103-6-19; MBG,
Location: Southern Pines, NC
Date: April 5, 2023
Willow oak #417; RAB p. 385, 55-3-30; AG p. 479, 103-6-19; MBG,
Location: Southern Pines, NC
Date: April 5, 2023
Willow oak #417; RAB p. 385, 55-3-30; AG p. 479, 103-6-19; MBG,
Location: Sacramento CA.
Date: 2021–3-16
Tree is beautiful this time of year.
Location: Southside Park, Sacramento CA.
Date: 2022-02-28
Has dropped some enormous limbs over the years in the heat of Aug
Location: Gardenfish neighborhood
Date: March 12 2022
Snow on willow oak

Date: c. 1865
illustration by H. J. Redouté from Michaux's 'North American Syl
Location: Downingtown Pennsylvania
Date: 2020-11-14
looking up trunk in autumn
Location: Southern Pines, NC
Date: April 5, 2023
Willow oak #417; RAB p. 385, 55-3-30; AG p. 479, 103-6-19; MBG,
Location: Downingtown Pennsylvania
Date: 2020-11-14
upper reaches of tree in fall
Location: Downingtown Pennsylvania
Date: 2020-11-14
fall foliage and branching
Location: Downingtown, Pennsylvania
Date: 2010-07-02
full-grown tree in school yard
Location: Downingtown, Pennsylvania
Date: 2015-07-22
two mature trees behind a Wawa store
Location: Downingtown Pennsylvania
Date: 2020-11-14
crown in fall color

Date: 2007-09-11
Credit Michael Wolf
Location: Downingtown, Pennsylvania
Date: 2015-07-22
the summer leaves

Date: 2009-10-06
Location: Northeastern, Texas
Date: 2018-12-03
Location: Fairfax, VA | September 2022
Location: Downingtown Pennsylvania
Date: 2020-11-14
full-grown tree in fall color
Location: Downingtown Pennsylvania
Date: 2020-11-14
full-grown tree in fall color
Location: Fairfax, VA | April, 2023
Date: 2023-04-12
Location: Nationale Plantentuin Meise (Brussels)
Location: Nationale Plantentuin Meise (Brussels)
Location: Nationale Plantentuin Meise (Brussels)
Date: 2018-06-24
Location: Northeastern, Texas
Date: 2015-09-04
Bark on mature/aged tree
Location: Downingtown, Pennsylvania
Date: 2006-11-05
autumn color on full-grown tree
Location: Downingtown, Pennsylvania
Date: 2016-11-22
mature tree with some fall leaves left
Location: Prime Hook National Wildlife Refuge in Delaware
Date: 2016-10-13
wild tree along path
Location: Prime Hook National Wildlife Refuge in Delaware
Date: 2016-10-13
mature wild tree
Location: springfield MO
Date: 2014-04-30

Date: November
credit: Berean Hunter
Location: Northeastern, Texas
Date: 2015-09-04
Location: Northeastern, Texas
Date: 2015-09-19
Location: Downingtown, Pennsylvania
Date: 2010-07-02
full-grown trunk
Location: Downingtown, Pennsylvania
Date: 2010-07-02
trunk, bark, foliage
Location: Downingtown, Pennsylvania
Date: 2011-01-31
full-grown tree in winter
Location: Downingtown, Pennsylvania
Date: July in 2008
full-grown tree in summer
Location: Northeastern, Texas
Date: 2015-09-05
Q. phellos have tiny bristles at the tip of the leaves.
Comments:
  • Posted by ILPARW (southeast Pennsylvania - Zone 6b) on Dec 11, 2017 7:54 PM concerning plant:
    Willow Oak is a large, beautiful tree that is native from southeast New York & New Jersey down to northern Florida to east Texas & Oklahoma up into Missouri, growing in bottomlands and along water courses, ponds, and lakes, growing in moist to draining wet soils. It likes acid soils, definitely pH 6 to about 6.8, but the range is probably a little greater than that both ways. Its shiny leaves are simple and not lobed, to 5.5 inches long x 1 inch wide, looking sort of like a willow leaf that turns golden or orange brown in autumn. It grows about 1.5 to 2 feet/year. It should live at least 150 years and often over 200 years. It bears small acorns to about 1/2 inch long with a thin saucer-like cap every two years like other members of the Black Oak subgroup. It makes an excellent street or yard tree. Its root system is really fibrous and it does not really make a taproot, though nurseries will root prune it in the field for better success. It is offered by a good number of southern nurseries. I've seen wild specimens growing in wetland areas of southern and central Delaware. I've seen some great, large, planted specimens in landscapes in southeast Pennsylvania. If one grows this species in Zone 5, one must make sure that the selection of stock is that hardy, as I have never seen Willow Oak in my native northern Illinois, though Morton Arboretum is supposed to have some in their Oak Collection.
  • Posted by Dodecatheon3 (Northwest Arkansas - Zone 6b) on Sep 17, 2015 5:58 PM concerning plant:
    Willow Oak's preferred growing environment is moist bottom land, but it will tolerate a range of soils. Once established, it also tolerates drought.
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