When does American hazelnut bloom?

American hazelnut produces its small, drooping male catkins and tiny red female flowers from March through May, usually before the leaves fully unfurl.

What pollinates American hazelnut?

The flowers are mainly wind pollinated, but bees and beetles also visit to collect pollen from the catkins in early spring.

How much light and water does American hazelnut need?

It grows best in part sun with medium moisture but tolerates a range of light from full sun to part shade and can handle drier soils once established.

What is the growth habit of American hazelnut?

It grows as a dense, multi-stemmed shrub, often forming thickets through root suckers, and typically reaches modest heights suited to hedgerows and woodland edges.

Is American Hazelnut toxic to livestock?

The USDA PLANTS Database does not flag American Hazelnut as toxic to livestock.

Is American Hazelnut HOA-friendly?

American Hazelnut is generally an HOA-friendly choice in the right placement, with moderate maintenance.

American Hazelnut

Name: Pollinator Patch
Author: Pollinator Patch

Corylus americana

Last reviewed: September 2026

American hazelnut is a multi-stemmed shrub that blooms from March to May with small catkins before its leaves emerge, doing well in part sun and average garden soil.

Toxicity unknown

American Hazelnut (Corylus americana) is not listed by the ASPCA Animal Poison Control Center (opens in new tab) or the other sources we check, so we have no verdict for it either way. Absence from those lists is not a clearance. If your pet shows symptoms after eating any plant, call the ASPCA at (888) 426-4435.

The USDA PLANTS Database (opens in new tab) does not flag American Hazelnut as toxic to livestock.

Light

part sun

Water

medium

Size

60"–120" H × 60"–120" W

Bloom

Mar, Apr, May

Native to

AL, AR, CT, DE and 31 more states

Pollinators

bees, beetles

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American hazelnut is a native shrub that produces edible nuts in fall and displays attractive yellow autumn foliage. It forms a rounded, multi-stemmed growth habit and blooms with dangling catkins in early spring before the leaves emerge.

Growing American Hazelnut

Grow American Hazelnut in part sun and medium water. Mature plants reach 60 to 120 inches tall and spread 60 to 120 inches wide. Expect moderate maintenance to keep it looking intentional in a front yard.

In an HOA neighborhood

American Hazelnut is an HOA-friendly choice. Maintenance level: moderate. Tidiness: 3 out of 5.

Works well in: foundation, mid zone.

Large mature size may overwhelm smaller spaces
Can sucker and spread if not managed

Wildlife value

Host plant for henry's elfin, green comma, banded hairstreak.

The early spring catkins provide crucial pollen for native bees and beetles when few other food sources are available. The nuts feed squirrels, chipmunks, and various bird species throughout fall and winter.

Common questions

When does American hazelnut bloom?: American hazelnut produces its small, drooping male catkins and tiny red female flowers from March through May, usually before the leaves fully unfurl.
What pollinates American hazelnut?: The flowers are mainly wind pollinated, but bees and beetles also visit to collect pollen from the catkins in early spring.
How much light and water does American hazelnut need?: It grows best in part sun with medium moisture but tolerates a range of light from full sun to part shade and can handle drier soils once established.
What is the growth habit of American hazelnut?: It grows as a dense, multi-stemmed shrub, often forming thickets through root suckers, and typically reaches modest heights suited to hedgerows and woodland edges.
Is American Hazelnut toxic to livestock?: The USDA PLANTS Database does not flag American Hazelnut as toxic to livestock.
Is American Hazelnut HOA-friendly?: American Hazelnut is generally an HOA-friendly choice in the right placement, with moderate maintenance.

These answers were drafted with an AI model from this plant's data. Verify care details with a local expert.

Native range data from vouchered herbarium specimen records and regional native plant society lists. Pollinator and host plant associations compiled from GBIF, iNaturalist, and published ecological literature.

If something looks wrong

Common plant problems, and what to check first

These come up on almost any plant. Each guide lists the likely causes in the order they are worth ruling out, with one thing to check before you act on any of them, and links to the source it came from.

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