When does Lombardy poplar bloom?

Lombardy poplar produces catkins in April and May before its leaves fully expand.

What pollinators visit Lombardy poplar?

Its early spring catkins provide pollen that bees and beetles will visit, though the tree also relies heavily on wind for pollen dispersal.

How much water does Lombardy poplar need?

It grows best with medium moisture but can tolerate wetter soils near streambanks as well as drier upland sites once established.

What growing conditions suit Lombardy poplar best?

This tree prefers full sun and performs well in temperate climates with cold winters and warm summers, similar to much of its natural range in Europe and Central Asia.

Is Lombardy Poplar toxic to livestock?

The USDA PLANTS Database does not flag Lombardy Poplar as toxic to livestock.

Is Lombardy Poplar HOA-friendly?

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

Lombardy Poplar

Name: Pollinator Patch
Author: Pollinator Patch

Populus nigra

Last reviewed: September 2026

Lombardy Poplar (Populus nigra) is a perennial tree. It blooms in April and May. The flowers draw bees and beetles.

Toxicity unknown

Lombardy Poplar (Populus nigra) 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 Lombardy Poplar as toxic to livestock.

Light

full sun

Water

medium

Size

360"–720" H × 120"–240" W

Bloom

Apr, May

Pollinators

bees, beetles

Native alternatives to Lombardy Poplar

Lombardy Poplar is not native to the United States. These natives fill a similar role in a planting, matched on bloom season, bloom color and mature size.

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Lombardy poplar is a fast-growing, columnar tree that creates a distinctive tall, narrow silhouette in the landscape. It's often used for windbreaks or screening but has a relatively short lifespan and can develop structural problems as it matures. This deciduous tree produces early spring blooms before the leaves emerge.

Growing Lombardy Poplar

Grow Lombardy Poplar in full sun and medium water. Mature plants reach 360 to 720 inches tall and spread 120 to 240 inches wide. Expect high maintenance to keep it looking intentional in a front yard.

In an HOA neighborhood

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

Works well in: backyard only.

Extremely large mature size inappropriate for most residential lots
Short lifespan and disease susceptibility create maintenance concerns
Aggressive root system can damage foundations and utilities

Wildlife value

Host plant for viceroy butterfly, large poplar sphinx moth.

The early spring flowers provide nectar for bees and beetles when few other food sources are available. The tree also serves as habitat for various birds and insects throughout the growing season.

Common questions

When does Lombardy poplar bloom?: Lombardy poplar produces catkins in April and May before its leaves fully expand.
What pollinators visit Lombardy poplar?: Its early spring catkins provide pollen that bees and beetles will visit, though the tree also relies heavily on wind for pollen dispersal.
How much water does Lombardy poplar need?: It grows best with medium moisture but can tolerate wetter soils near streambanks as well as drier upland sites once established.
What growing conditions suit Lombardy poplar best?: This tree prefers full sun and performs well in temperate climates with cold winters and warm summers, similar to much of its natural range in Europe and Central Asia.
Is Lombardy Poplar toxic to livestock?: The USDA PLANTS Database does not flag Lombardy Poplar as toxic to livestock.
Is Lombardy Poplar HOA-friendly?: Lombardy Poplar 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.

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

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