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Carya laciniosa (Kingnut Hickory / Shellbark Hickory)

Carya laciniosa (Kingnut Hickory / Shellbark Hickory)

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Shellbark Hickory is a large bottomland tree with peeling bark and substantial nuts. Its natural settings include low woods, river floodplains and stream banks. A mature tree commonly reaches 60 to 80 feet tall and can grow taller, so it needs a generous planting area. Yellow to golden-brown fall foliage and the bark add seasonal interest beyond the nut crop.

Choose rich loamy or silty soil with consistent moisture and sun to partial sun. The species tolerates temporary spring flooding, which makes it useful to consider for appropriate low ground. That tolerance should not be read as a recommendation for permanent standing water. Place it where fallen nuts, leaves and twigs will be manageable, particularly near paths, parking areas and maintained lawn.

Plant specifications

Key growing facts

Sunlight Full to partial sun
Soil moisture Moist
Height 60-100 ft
Bloom season Mid- to late spring

Native landscape companions

For partial sun / light shade and moist soil, consider these native plants alongside Carya laciniosa:

Companion plant Height
Bitternut Hickory (Carya cordiformis) 60-100 ft
Tall Bellflower (Campanulastrum americanum) 2-6 ft
Sensitive Fern (Onoclea sensibilis) 1½–3 ft
Spreading Oval Sedge (Carex normalis) 2–3 ft

These landscape suggestions combine overlapping growing needs with documented plant associations. Match soil, seasonal wetness and mature spread to your site. Remnant records are described separately under Plant communities & associates.

Show / hide ▾Growing & planting details
Growth habit Tall, straight-trunked tree with an oval to elongated crown; reproduces by seed
Root form Taproot
Soil pH Published cultivation guidance lists acidic, alkaline, neutral soil conditions; no optimal numeric interval is established.
Cultivation hardiness zones Zones 5a–8b (general cultivation guidance)
Drought tolerance Low
Salt tolerance None

Plant identification & seed reference

Botanical name Carya laciniosa
Other common names kingnut hickory; Big Shellbark Hickory; Broom Hickory; King Nut; Shagbark Hickory; Shellbark Hickory
Seed germination USDA lists cold stratification as required; duration is not specified.
Plant family Juglandaceae
Seeds per pound — reference estimate 30

Plant characteristics

Carya laciniosa (Kingnut Hickory / Shellbark Hickory) is a slow-growing tree from the Walnut Family.  Shellbark Hickory enjoys partial to full sun and moist conditions in deep loam or silt soils. It is a tree of flooded areas and can tolerate temporary flooding during the spring. This tree is uncommon to rare in all of Illinois particularly in northern Ilinois where it is only found sparingly in the Chicago area.  It can also be found in northern Indiana and southern Michigan.

This tree is a slow grower and it may not produce nuts until a tree becomes 30 to 40 years old.  Shellbark Hickory is not often used as a landscape tree because it can be messy to clean up, however, it is quite attractive. It has high wildlife value and typically resists storm damage. Due to its slow-growing nature, this tree can be on the small side when grown in pots when compared to other native trees.

  • Show / hide ▾Plant communities & associatesNo verified list yet

    Illinois woodland and stream communities

    Middle Fork Woods, Vermilion County (1999–2002 survey). Recorded in: dry-mesic upland forest — immature second growth.

    Dry-mesic upland forest — immature second growth — selected native associates: Carex pensylvanica, Carex rosea, Elymus villosus.

    These plants share a recorded habitat; they were not necessarily found in the same small plot.

    Show / hide ▾Native range & C-value

    State nativity describes a broad range. Use the Chicago-region assessment for local context; a state listing does not establish county nativity.

    Wetland indicator — NWPL 2022 Midwest FACW
    C-value — Chicago region, Flora 2017 9
    Chicago-region native — Flora 2017 Yes
    Native range — U.S. states Alabama; Arkansas; Delaware; Georgia; Illinois; Indiana; Iowa; Kansas; Kentucky; Maryland; Michigan; Mississippi; Missouri; New York; North Carolina; Ohio; Oklahoma; Pennsylvania; South Carolina; Tennessee; Texas; Virginia; West Virginia
    County nativity Not yet verified; occurrence records do not establish nativity.
    Show / hide ▾Pollinators & wildlife

    Other insect & wildlife relationships

    Caterpillars this plant can feed

    Hickory Horndevil.

    • Nuts and browsing: Wildlife uses the nuts, and deer and other browsers eat the leaves.

    Additional published species records; Illinois insect occurrence is not established by this account. These records do not guarantee that every insect occurs at your planting site.

    Show / hide ▾Frequently asked questions

    What are the ideal growing conditions for Kingnut Hickory / Shellbark Hickory?
    Light: Full to partial sun. Soil moisture: Moist.

    How do I germinate and establish Kingnut Hickory / Shellbark Hickory from seed?
    USDA lists cold stratification as required; duration is not specified.

    Is Kingnut Hickory / Shellbark Hickory deer and herbivore resistant?
    Species-specific deer resistance has not been verified here. Even plants described as resistant may be browsed. Use physical protection where deer damage is a concern.

    When should I expect Kingnut Hickory / Shellbark Hickory to bloom?
    Typical flowering period: Mid- to late spring. Timing varies with location and weather.

    Show / hide ▾Sources & ecological notes

    Landscape companion selection: Natural Communities compared the growing requirements shown on these species pages with selected source records: Dry-mesic upland forest — immature second growth — East-central Illinois. The shortlist is a planting-design inference. A shared record does not establish adjacency, identical soil requirements, local seed origin, or a tested planting combination. Regional synthesis records retain their documented focal-to-associate scope.

    Illinois woodland records: Larimore, Phillippe & Ebinger (2008), Middle Fork Woods flora, Appendix I. © 2008 University of Illinois Board of Trustees, CC BY 4.0. Habitat records transcribed, selected and linked to catalog names by Natural Communities. Survey: 1999–2002.

    Native range & ecological ratings: Flora of the Chicago Region (2017), via Universal FQA; USACE Chicago FQA (2017); Kew WCVP / Plants of the World Online; USACE National Wetland Plant List.

    Growing conditions & other references: Illinois Wildflowers, John Hilty; USDA NRCS PLANTS; NC State Extension Plant Toolbox.

    Native range does not identify the origin of the seed or plants offered. Community and wildlife records apply to the locations and conditions described.

    Research notes & credits

    USACE/ERDC fqadata — Chicago Region FQA 2017. Herman, B., Sliwinski, R. & Whitaker, S. (2017), Chicago Region FQA Calculator; distributed by USACE/ERDC in fqadata under CC0. Values may differ from Flora of the Chicago Region (2017). CC0 dedication. Retained for comparison; the displayed C-value follows Flora database 80.

    Range data: World Checklist of Vascular Plants, Royal Botanic Gardens, Kew; 4 June 2026 release, accessed 7 September 2026. © The Trustees of the Royal Botanic Gardens, Kew. CC BY 3.0; selected and reformatted. Kew cannot warrant the quality or accuracy of these data. This use has no Kew endorsement.

    Flora rating attribution: Kenneth Johnson (2018), Flora of the Chicago Region UFQA Database, following Gerould Wilhelm and Laura Rericha (2017), Flora of the Chicago Region: A Floristic and Ecological Synthesis. Individual rating facts are presented with original commentary; the calculator’s software license is not treated as a license for the underlying Flora publication.

    Growing guidance: Illinois Extension — Keeping deer out of the yard and garden. Selected facts in original wording. General deer advice is not a species resistance rating.

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