American hornbeam (Carpinus caroliniana), photographi

How to Grow American Hornbeam

Carpinus caroliniana · Zones 3-9

American Hornbeam is a tree, a long-term addition to the landscape. It's hardy across USDA zones 3 through 9.

American Hornbeam — the short answer

American Hornbeam: grown in zones 3–9, shade, pH 4.5–7.4.

USDA zones
3–9
Manual horticultural correction (source not retained); NC State Extension and Missouri Botanical Garden, with the remaining rows from other published sources or Growable Ground compilation
Soil pH
4.5–7.4
Growable Ground Plant Database
Sun
Shade
Growable Ground Plant Database

Plant data: Growable Ground Plant Database, compiled from FAO ECOCROP, USDA PLANTS and university Extension sources — each tile names its own row's source, because per-field provenance varies.

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What American Hornbeam is

American Hornbeam grows as a perennial and reaches around 30 feet at maturity. It blooms green in spring.

How to grow American Hornbeam

American Hornbeam grows in USDA zones 3 through 9. American Hornbeam does best in shade — at least 2 hours of direct sun a day — and soil from pH 4.5 to 7.4, on well-drained ground. It needs a growing season of at least 120 frost-free days and about 400 hours of winter chill, which is why climate matters as much as soil.

USDA Zones

3-9

USDA PHZM 2023

Soil pH

4.5 - 7.4

Growable Ground Plant Database

Sun

Shade

Growable Ground plant catalog

Drainage

well (dry spells)

Growable Ground plant catalog

Mature Height

30 ft

Growable Ground plant catalog

Chill Hours

400+

Winter hours below ~45°F it needs to fruit — too-mild winters can leave it bloom-shy.

Growable Ground plant catalog

Frost-Free Days

120+

The frost-free stretch it needs start to finish — short-season areas may need an indoor head start.

Growable Ground plant catalog

  1. Plant it right

    Set american hornbeam in shade with well-drained soil. Many fruit trees need a second variety nearby to pollinate — check before you plant just one.

  2. Match the soil

    American Hornbeam prefers pH 4.5 to 7.4 (Growable Ground Plant Database). A quick soil test from your local Extension lab tells you whether to add lime or sulfur to land in band.

  3. Water steadily

    Keep the root zone evenly moist through establishment. A 2–3 inch mulch layer holds moisture without waterlogging.

  4. Be patient, then harvest

    Prune annually while the tree establishes; fruit trees reward patience with years of harvest. Local Extension guides publish per-cultivar bearing-age tables.

Where American Hornbeam thrives

American Hornbeam is hardy across USDA zones 3 through 9. Zone is only the starting point, though: the soil pH, drainage, and frost dates on your specific land decide how well it actually does.

A USDA zone is a 10°F band of average annual extreme winter minimum, so zones 39 spans average winter lows from -40°F to 30°F (USDA PHZM 2023). Across the 50 states and DC, that band covers 42 outright and splits 9 more down the middle — and which side of that line your land sits on changes the answer.

Zones 3–9 highlighted on the USDA national hardiness zone map

Zones 3–9·Where American Hornbeam growsOpen map →

Where American Hornbeam stands, state by state

American Hornbeam is rated for zones 39 — a cold floor USDA puts at -40 to -30°F. Across the 50 states and DC, 42 sit fully inside that band, the line runs through 9 more, and 0 sit outside it — and inside every split state, the same line runs on at county grain.

Fully inside zones 3–9

42 states

3 of 42 shown

The line runs through

9 states

3 of 9 shown

American Hornbeam’s band covers part of each of these states — which side of the line your county sits on changes the answer, and each state page draws it.

State zone extents: USDA Plant Hardiness Zone Map (PHZM) 2023. A zone is a 10°F band of average annual extreme minimum temperature, so a state that splits the band contains the boundary — its own page draws the county line, and a parcel report resolves which side your land sits on.

Good to know

Good news for pet owners — american hornbeam isn't known to be toxic to dogs or cats. (Source: ASPCA.)

American Hornbeam isn't classified as a notable pollinator plant in our data — pair it with high-value bloomers nearby to feed bees.

Your land is one point inside American Hornbeam's range

This page resolves to the species. Your state page draws the county line, and a report reads the parcel — the soil pH, drainage, sun, and frost dates on your exact ground, which no species average can see.

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See if American Hornbeam will thrive on your land

Zone averages are a start. Your exact soil pH, drainage, sun exposure, and frost dates shape whether american hornbeam actually takes — we score it against the real conditions at your address.

Three things about your exact spot that zone averages miss:

Your soil pHYour frost-free daysYour sun & shade

We read public map data for this spot — soil, climate, flood, and parcel records. How we handle your address.

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How we know this about American Hornbeam

The figures above are cited per row, not per site: the pH band names this plant’s own source column, the three temperature figures each carry their own, and days-to-maturity cites the publication that actually lists it. All of it comes from the Growable Ground Plant Database — a compilation over FAO ECOCROP, USDA PLANTS, and university Extension sources, published openly with per-field provenance.

Grounded inUSDA PLANTS DatabaseUSDA PHZMASPCA

Frequently asked questions

Can I grow American Hornbeam in my zone?

American Hornbeam grows in USDA hardiness zones 3 through 9 (USDA PHZM 2023). Zone is one factor — soil pH, drainage, and frost dates on your specific parcel also shape whether it takes.

When should you plant American Hornbeam?

Set american hornbeam out in early spring or fall while it's dormant, so the roots establish before the heat of summer. Your local last-frost date — which a Growable Ground report pulls for your exact address — sets the precise window.

How much sun does American Hornbeam need?

American Hornbeam is shade-tolerant — it gets by on as little as 2 hours of direct sun, so it earns a place most vegetables can't use. A north-facing strip or the ground under a leafy canopy is right where it belongs. A Growable Ground report shows which corners of your land stay shaded through the day, turning those dim spots into planting spots.

What soil does American Hornbeam need?

American Hornbeam prefers soil pH 4.5 to 7.4, on well-drained ground (Growable Ground Plant Database). Your report scores your parcel's actual soil against that using USDA SSURGO data.

Does American Hornbeam attract pollinators?

American Hornbeam isn't classified as a notable pollinator plant in our data. Pairing it with high-value bloomers nearby keeps bees and butterflies fed.

Is American Hornbeam safe for pets?

American Hornbeam is not known to be toxic to dogs or cats based on available data. Always supervise pets around new plantings. (Source: ASPCA.)