Hickory

Growing Conditions

Growing Zones

Thrives in USDA Zones 4 - 8

Companion Planting

When to Plant

• Transplant

  Plant container or balled-and-burlapped trees in early spring before bud break; hickory taproots are easily damaged so minimize root disturbance

• Direct Sow

  Direct sow fresh nuts in autumn 1-2 inches deep; cold stratification overwinter is natural; germination occurs in spring

• Harvest

  Harvest after husks split open and nuts fall naturally; shake branches to bring down remaining nuts; process immediately to remove husks and dry nuts for storage

Organic Growing Tips

• Mulch broadly under the entire drip line with wood chips to improve soil moisture and organic matter; do not cultivate within the drip line.

• Allow leaf litter to accumulate and decompose under the tree; hickory leaves are high in allelopathic compounds but break down over winter and feed the root zone.

• For maximum nut production, plant 2-3 trees from different sources to encourage cross-pollination.

• Harvest nuts promptly after they fall; nuts left on wet ground for more than a few days develop mold on the kernel.

Common Pests

• Hickory Shuckworm
• Pecan Weevil
• Hickory Bark Beetle
• Anthracnose
• Phylloxera

Taxonomy

Kingdom

Plantae

Family

Walnut family (Juglandaceae)

Genus

Carya

Species

Carya ovata

Natural History

Shagbark Hickory (Carya ovata) is native to the eastern hardwood forests of North America, from southern Ontario and Quebec through the Appalachians and into Texas and Florida. The genus Carya is entirely North American with the exception of a few species in Southeast Asia, representing a lineage that has been part of the North American forest for over 65 million years. Indigenous peoples across the eastern woodlands extensively harvested hickory nuts, processing them into a fatty, high-calorie product called pawcohiccora (from an Algonquin word) that gave the tree its English name. The concentrated nut milk was used to flavor hominy and various preparations and was an important caloric resource in autumn. European colonists quickly recognized the value of hickory wood, which combines hardness, flexibility, and impact resistance in a combination unmatched by any other North American timber. It became the primary wood for ax handles, wagon wheel spokes, and tool handles throughout the 18th and 19th centuries; the fame of the material is embedded in Andrew Jackson's nickname, "Old Hickory," assigned because of his legendarily tough character. Hickory-smoked meats are a culinary tradition across the American South, and the wood is still considered the premier choice for barbecue smoking.

Traditional Use

Hickory bark and nut preparations were documented in limited Native American ethnobotanical records, primarily for fever and skin conditions. The primary historical significance of hickory was as a nut food and timber source rather than a medicinal plant.

• Eastern Woodland Indigenous peoples - Nuts and nut oil

  Multiple eastern woodland peoples including Cherokee, Delaware, and Menominee are documented in ethnobotanical records as using hickory nut oil and nut preparations as both food and a skin and hair conditioning material. The rendered nut fat was applied to skin and hair. Cherokee bark preparations were documented for back pain and joint complaints in records compiled in the 19th century. The overwhelming primary significance of hickory was as a calorie-dense nut food and the basis of pawcohiccora nut milk.

Hickory nuts are safe, nutritious foods with a long history of human consumption. Like all members of the Juglandaceae, hickory pollen is a significant allergen. The hull sap contains juglone and related compounds that stain skin deeply and may cause contact dermatitis in sensitive individuals; wear gloves when hulling.

This information is provided for historical and educational purposes only and is not medical advice. Always consult a qualified healthcare professional before making decisions related to your health.

Morphology (Plant Structure & Identification)

• Root System

  Very deep taproot, often reaching 6+ feet in mature trees, with spreading lateral roots; the taproot makes transplanting difficult but gives established trees excellent drought tolerance and wind resistance.

• Stem

  The most distinctive feature is the bark on mature trees: large, flat, curved plates separate from the trunk and curl outward at the ends to create a uniquely shaggy appearance. Young trees have smooth grey bark. Trees reach 60-80 feet at maturity.

• Leaves

  Pinnately compound leaves 8-14 inches long with 5 (sometimes 7) broadly lanceolate leaflets; one of the last trees to leaf out in spring and one of the first to develop golden autumn color in early September.

• Flowers

  Separate male and female flowers on the same tree; male catkins 4-5 inches long in groups of three; female flowers small and clustered at shoot tips. Wind-pollinated.

• Fruit

  Round to oval nut 1-1.5 inches long enclosed in a thick husk that splits cleanly into four sections at maturity; the shell is moderately thick with a sweet, rich kernel that is considered the finest-flavored of all native hickory nuts.

Known Varieties

Common cultivars worth knowing

• Grainger

  One of the best-named shagbark cultivars; thin shell, high kernel percentage, and very sweet flavor. Selected from Tennessee.

  Best for: Nut production; the benchmark cultivar for shagbark quality

• Shellbark Hickory (C. laciniosa)

  Closely related species with larger nuts than shagbark and preference for bottomland soils; very similar shaggy bark but leaflets usually 7 instead of 5.

  Best for: Bottomland sites; very large nut size

• Mockernut (C. tomentosa)

  Native species with aromatic foliage and moderately thick-shelled nuts; outstanding wildlife value. Not selected for nut production but excellent as a native forest tree.

  Best for: Wildlife habitat; native planting