Oxydendrum arboreumIndiana NativeIndiana Native
Sourwood

 Plant Type:
 Growth Forms:
 Hardiness:
 Deciduous / Evergreen:
 Flower Notes:
White (Small, urn-shaped flowers appear in mid summer)
 Foliage Notes:
Green (Summer); Multi-Colored (An outstanding array of reds, purples, and yellows in the fall)
 Stem Notes:
glabrous or sparsely pubescent, slender
 Fruit Notes:
Cream (Subtly attractive capsules that persist into winter)
 Ultimate Height:
25-30 feet
 Ultimate Spread:
50-75 feet
 Bloom Times:
 Fruiting Times:
 Light Requirements:
 Soil Water Requirements:
 Soil Notes:
Requires organic, acidic, moist, well-drained soils
 Range:
Southeastern United States
 Maintenance:
 Diagnostic Characteristics:
Leaves are 3-8" long by 1.5-3.5" wide, alternate, simple, oblong, and acuminate with finely serrated margins. The sessile buds are only 0.06" long. Stems are narrow can be olive to bright red. The distinctive bark is gray to brown with deep ridges and furrows. Flowers are small (0.25"), urn-shaped, and heavily produced if in high light conditions. Fruits are a capsule, 0.3" long, 5-valved tan to yellow.

Additional Information

This plant gets it common and scientific name from its sour-tasting leaves. The genus name is derived from the Greek word "oxys", meaning sour, and "dendron", meaning tree. Honey produced from the pollen of Sourwood flowers is considered valuable. The attractive, slightly fragrant flowers are often prolifically produced, especially in full sun, and are effective for up to four weeks. Like all Ericaceous plants, Oxydendrum arboreum requires rich, organic, moist, well-drained, and acidic soil. This plant is best grown in full sun, but can tolerate some shade, at the expense of flowers and fall color. This plant is not appropriate for polluted, urban, or drought conditions.

When Oxydendrum arboreum has been observed flowering or fruiting at Purdue University

Flowering

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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 not presentWeek 44 fruiting not presentWeek 45 fruiting not presentWeek 46 fruiting presentWeek 47 fruiting not presentWeek 48 fruiting presentWeek 49 fruiting presentWeek 50 fruiting not presentWeek 51 fruiting not presentWeek 52 fruiting not present

1 Oxydendrum arboreum found

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= Heritage plant = Memorial plant
Number Accession ID Location
12012_00759*ASC
Heritage Plant
Dedicated/Memorial Plant

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