Carya glabra – Pignut hickory, Hog nut

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Juglandaceae

Carya glabra – Pignut hickory, Hog nut

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In its original habitat C. glabra is an imposing tree growing to a height of approx. 30 m: when cultured it is usually somewhat smaller. Old trees are valued for their tough durable wood. The crown is irregularly oval. Young trees have smooth grey bark. In older specimens the bark is dark brown and has a network of grooves. Young branches are very pendulous. The leaves are imparipinnate and consist of 5 to 7 narrow leaf segments. These are lanceolate to narrowly obovate. The leaves are somewhat brown tinted when they first appear but are light green in the summer. In the autumn the leaves turn colour to a golden yellow. The pear-shaped bitter nuts are light brown with a smooth shell. The nuts only partially open when they ripen. The first nuts do not appear until after approx. 25 years. The tree has a deep root system.

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Specifications
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Height
15 - 25 (30) m
Crown
oval, open, half-open crown
Bark and branches
trunk smooth and grey, later dark brown and with a network of grooves
Leaf
imparipinnate, glossy light green, 10 - 17 cm, feathered leaf
Autumn colour
yellow
Flowers
♂ catkins approx. 6 cm, ♀ flowers in terminal ears, May
Fruits
pear-shaped nut, approx. 2.5 - 3.5 cm, edible fruits
Spines/thorns
None
Toxicity
usually not toxic to people, (large) pets and livestock
Soil type
rich, well-drained soil
Paving
tolerates no paving
Winter hardiness zone
5b (-26,0 to -23,4 °C)
Wind resistance
good
Other resistances
resistant to frost (WH 1 - 6), can withstand wind
Fauna tree
valuable for bees (honey plant)
Application
parks, cemeteries, large gardens
Shape
clearstem tree
Origin
north-east of the United States
Clear stem tree acid soil clay soil loamy soil sandy soil tolerates no paving resistant to frost (WH 1 - 6) can withstand wind oval 1st size , taller than 12 metres half-open crown green green average growing Feathered leaf Attractive autumn colour valuable for bees (honey plant) non-toxic (usually) Ornamental fruit Edible fruits
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Frequently asked questions
Carya glabra

Carya glabra can eventually reach a height of 15 - 25 (30) m, depending on the site and climate conditions.

Carya glabra is average growing and can eventually reach a height of 15 - 25 (30) m, depending on the site and climate conditions.

The leaves of Carya glabra turn yellow in autumn.

The right time to plant Carya glabra is during the dormancy period. In Western Europe, Carya glabra with root balls can generally be planted from mid-November to late April, although this depends strongly on the climatic conditions and the species of tree.

Carya glabra blooms in may.
General