Carya glabra

RHS Plant Profile
pignut hickory

Other common names

broom hickory, brown hickory, hognut, small-fruited hickory, pignut

Synonyms

Carya porcina

Trees

A very large, slow-growing deciduous tree with an oval-shaped crown and deep root system, also known by its common name of 'pignut hickory'. It can reach a maximum height of around 30m, but is smaller if cultured. Smooth, grey bark in young specimens turns to a textured brown as the tree matures and the pendulous foliage emerges brownish-green, changing to glossy pale green in the summer and then finally golden-yellow in the autumn. Fruits are nut-like and pear-shaped with a brown shell, and only appear on very mature specimens. Although edible, they are very bitter and tend to be favoured more by wildlife

Position

Full sun, Partial shade

Soil Types

Chalk, Loam, Sand

Max Height

Higher than 12 metres

Max Spread

wider than 8 metres

Size

Time to Maturity
20–50 years
Max Spread
wider than 8 metres
Max Height
Higher than 12 metres

Growing Conditions

Chalk Loam Sand
Moisture
Moist but well–drained or Well–drained
pH
Acid or Alkaline or Neutral

Position

Full sun Partial shade
Aspect
East–facing or North–facing or South–facing or West–facing
Exposure
Exposed or Sheltered
Hardiness
H6

Colour & Scent

Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Juglandaceae
Native to GB/Ireland
No
Foliage
Deciduous
Habit
Columnar upright, Pendulous weeping, Spreading branched
Genus
Carya are vigorous deciduous trees of handsome appearance, the large pinnate leaves colouring well in the autumn; male flowers are in catkins, females are insignificant spikes, followed by nuts, the kernels of some being edible
Name Status
Correct

How to Grow

Cultivation

Grow in a deep, fertile, humus-rich, moist but well-drained soil in full sun or partial shade. See tree cultivation for further advice

Propagation

Propagate by seed; seedlings rapidly develop a deep tap root and resent disturbance so plant out in permanent position in the first year

Suggested planting locations and garden types

  • Architectural
  • Low Maintenance

Pruning

See pruning group 1

Pests

Generally pest-free

Diseases

May be susceptible to crown gall, powdery mildews and leaf spot- see leaf damage on woody plants