When does American Elm bloom?

American Elm flowers appear in early spring, typically from March through May, opening before the leaves emerge.

What insects use American Elm as a host plant?

American Elm serves as a larval host for a number of butterflies and moths, so leaving mature trees in place supports local caterpillar populations.

What growing conditions does American Elm prefer?

This tree does best with full sun to part shade and moderate soil moisture, though it tolerates both seasonally wet floodplain soils and drier upland ground once established.

How big does American Elm get?

American Elm is a large shade tree that can reach 60 to 80 feet tall, often developing the classic wide, vase-shaped canopy the species is known for.

Is American Elm toxic to livestock?

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

Is American Elm HOA-friendly?

American Elm takes more care to look intentional in a front yard. Consider it for backyard or mid-zone beds rather than the street edge.

American Elm

Name: Pollinator Patch
Author: Pollinator Patch

Ulmus americana

Last reviewed: October 2026

American Elm is a fast-growing deciduous shade tree with a vase-shaped crown and small green flowers in March, April, and May. It grows well in full sun to part shade and handles both moist bottomland soils and drier upland sites.

Toxicity unknown

American Elm (Ulmus 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 Elm as toxic to livestock.

Light

full sun

Water

medium

Size

864"–1200" H × 480"–840" W

Bloom

Mar, Apr, May

Native to

AL, AR, CT, DE and 35 more states

Pollinators

butterflies, moths

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American Elm is a large, stately shade tree that can reach 60-100 feet tall with a graceful, vase-shaped canopy. This native Texas tree provides excellent shade and has a classic, formal appearance that works well in larger landscapes. It blooms with small flowers in early spring before the leaves emerge.

Growing American Elm

Grow American Elm in full sun and medium water. Mature plants reach 864 to 1200 inches tall and spread 480 to 840 inches wide. Expect low maintenance to keep it looking intentional in a front yard.

How to care for American Elm, by region

How to care for American Elm where it is actually grown: year-round basics plus what to do each season, region by region, with the sources for each.

Care guidance last updated: October 2026

Atlantic Coastal Pine Barrens (includes Riverhead, NY)

Year-round

American elm is a very large, fast-growing, adaptable tree whose big risk is Dutch elm disease.

Needs full sun or partial shade. It adapts to wet and dry sites and is not picky about soil texture.
Listed hardy in USDA zones 3a through 9b. It reaches 60 to 80 feet tall and 30 to 60 feet wide with rapid growth.
Dutch elm disease is a fatal fungal disease spread by bark beetles and has no known cure.
Resistant cultivars such as 'Princeton' and 'Valley Forge' are available.

Fall

Fall is the time for any size reduction cuts.

The tree can be kept at shrub size by cutting it to the ground in the fall every two or three years.
Leaf spots and cankers are common listed problems to note.
Pick a resistant cultivar if you plan to replace a lost elm.

Winter

Winter is a good time to plan which cultivar to plant.

Listed hardy in USDA zones 3a through 9b, so cold is rarely the issue.
Choose among resistant cultivars such as 'Princeton', 'Jefferson', and 'Valley Forge' before spring planting.
Allow plenty of space, since mature trees reach 30 to 60 feet wide.

Spring

Spring is the time to choose and plant a resistant cultivar and watch for wilting.

Dutch elm disease causes wilting, defoliation, and death.
'Princeton' is highly resistant and 'Valley Forge' has the best resistance listed.
Fibrous roots make it easy to transplant.

Summer

Summer care is light, but watch for wilting and leaf pests.

It tolerates occasionally dry to very dry soil.
Watch for elm leaf beetle, elm lace bug, and elm leafminer.
Wilting branches can be a sign of Dutch elm disease or wetwood, which causes wilt and dieback.

Sources: NC State Extension Plant Toolbox, Ulmus americana

In an HOA neighborhood

American Elm takes more care to keep looking intentional in a front yard. Maintenance level: low. Consider it for backyard or mid-zone beds rather than the street edge.

Works well in: backyard only.

Tree size exceeds typical HOA-friendly range
Best suited for backyard or with special approval

Wildlife value

The tree supports butterflies and moths, and its seeds provide food for birds. As a large native tree, it offers nesting sites and shelter for various wildlife species.

Common questions

When does American Elm bloom?: American Elm flowers appear in early spring, typically from March through May, opening before the leaves emerge.
What insects use American Elm as a host plant?: American Elm serves as a larval host for a number of butterflies and moths, so leaving mature trees in place supports local caterpillar populations.
What growing conditions does American Elm prefer?: This tree does best with full sun to part shade and moderate soil moisture, though it tolerates both seasonally wet floodplain soils and drier upland ground once established.
How big does American Elm get?: American Elm is a large shade tree that can reach 60 to 80 feet tall, often developing the classic wide, vase-shaped canopy the species is known for.
Is American Elm toxic to livestock?: The USDA PLANTS Database does not flag American Elm as toxic to livestock.
Is American Elm HOA-friendly?: American Elm takes more care to look intentional in a front yard. Consider it for backyard or mid-zone beds rather than the street edge.

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.

See all plant problem guides

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