Quercus phellosIndiana NativeIndiana Native
Willow Oak

 Plant Type:
 Growth Forms:
 Hardiness:
 Deciduous / Evergreen:
 Flower Notes:
Brown (Not ornamentally important)
 Foliage Notes:
Green (Bright green in the spring, deepening to dark green in the summer); Yellow (Yellow to yellow-brown fall foliage)
 Stem Notes:
slender, smooth
 Fruit Notes:
Brown (Acorns (0.5" dia.) in fall)
 Ultimate Height:
60-80 feet
 Ultimate Spread:
30-40 feet
 Bloom Times:
 Fruiting Times:
 Light Requirements:
 Soil Water Requirements:
 Soil Notes:
Widely adapted to different soils
 Range:
Eastern United States
 Maintenance:
 Diagnostic Characteristics:
Leaves (5" long by 1" wide) are alternate, simple, entire, willow-like with a bristle-tip, dark lustrous green.
Purdue Plant Doctor

Additional Information

Somewhat tolerant of city conditions. Oak wilt and scales, and many other oak tree pests, though none considered very serious. Low maintenance, long-lived tree. Use Northern sources in Indiana.

When Quercus phellos has been observed flowering or fruiting at Purdue University

Flowering

JanFebMarAprMayJunJulAugSepOctNovDec
Week 1 flowering not presentWeek 2 flowering not presentWeek 3 flowering not presentWeek 4 flowering not presentWeek 5 flowering not presentWeek 6 flowering not presentWeek 7 flowering not presentWeek 8 flowering not presentWeek 9 flowering not presentWeek 10 flowering not presentWeek 11 flowering not presentWeek 12 flowering not presentWeek 13 flowering not presentWeek 14 flowering not presentWeek 15 flowering not presentWeek 16 flowering not presentWeek 17 flowering presentWeek 18 flowering presentWeek 19 flowering not presentWeek 20 flowering not presentWeek 21 flowering not presentWeek 22 flowering not presentWeek 23 flowering not presentWeek 24 flowering not presentWeek 25 flowering not presentWeek 26 flowering not presentWeek 27 flowering not presentWeek 28 flowering not presentWeek 29 flowering not presentWeek 30 flowering not presentWeek 31 flowering not presentWeek 32 flowering not presentWeek 33 flowering not presentWeek 34 flowering not presentWeek 35 flowering not presentWeek 36 flowering not presentWeek 37 flowering not presentWeek 38 flowering not presentWeek 39 flowering not presentWeek 40 flowering not presentWeek 41 flowering not presentWeek 42 flowering not presentWeek 43 flowering not presentWeek 44 flowering not presentWeek 45 flowering not presentWeek 46 flowering not presentWeek 47 flowering not presentWeek 48 flowering not presentWeek 49 flowering not presentWeek 50 flowering not presentWeek 51 flowering not presentWeek 52 flowering not present

Fruiting

JanFebMarAprMayJunJulAugSepOctNovDec
Week 1 fruiting not presentWeek 2 fruiting not presentWeek 3 fruiting not presentWeek 4 fruiting not presentWeek 5 fruiting not presentWeek 6 fruiting not presentWeek 7 fruiting not presentWeek 8 fruiting not presentWeek 9 fruiting not presentWeek 10 fruiting not presentWeek 11 fruiting not presentWeek 12 fruiting not presentWeek 13 fruiting not presentWeek 14 fruiting not presentWeek 15 fruiting not presentWeek 16 fruiting not presentWeek 17 fruiting not presentWeek 18 fruiting not presentWeek 19 fruiting not presentWeek 20 fruiting not presentWeek 21 fruiting not presentWeek 22 fruiting not presentWeek 23 fruiting not presentWeek 24 fruiting not presentWeek 25 fruiting not presentWeek 26 fruiting not presentWeek 27 fruiting not presentWeek 28 fruiting not presentWeek 29 fruiting not presentWeek 30 fruiting not presentWeek 31 fruiting not presentWeek 32 fruiting not presentWeek 33 fruiting not presentWeek 34 fruiting not presentWeek 35 fruiting not presentWeek 36 fruiting not presentWeek 37 fruiting not presentWeek 38 fruiting not presentWeek 39 fruiting not presentWeek 40 fruiting not presentWeek 41 fruiting not presentWeek 42 fruiting not presentWeek 43 fruiting presentWeek 44 fruiting not presentWeek 45 fruiting presentWeek 46 fruiting presentWeek 47 fruiting not presentWeek 48 fruiting not presentWeek 49 fruiting not presentWeek 50 fruiting not presentWeek 51 fruiting not presentWeek 52 fruiting not present

8 Quercus phellos found

Building Map...

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= Heritage plant = Memorial plant
Number Accession ID Location
12021_00036*CFST
22021_00035*FFST
32021_00036*BFST
42023_00052*ATERY
52023_00076*APICK
62023_00076*CSLAYTER
72023_00076*DSLAYTER
82024_00146*AFSTW

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