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Populus deltoides (Eastern Cottonwood)
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© Jared Shorma, some rights reserved (CC-BY) · iNaturalist

Populus deltoides

Eastern Cottonwood

At a Glance

TypeTree
FoliageDeciduous
Height60-100 feet (18-30 m)
Width40-60 feet (12-18 m)
Maturity20 years

Growing Zones

USDA Hardiness Zones

3 - 9
These zones indicate the coldest temperatures this plant can typically survive.
What's my zone? →
Frost Tolerancehardy

Key Features

Native to North America
Maintenancehigh

Overview

Populus deltoides is a fast-growing, deciduous tree in the Salicaceae family, growing 60–100 feet (18–30 m) tall and 40–60 feet (12–18 m) wide — among the fastest-growing native trees in North America, adding 5–8 feet (1.5–2.4 m) of height per year in the first 10 years. The epithet deltoides references the triangular (deltoid) leaf shape — leaves are 3–6 inches (8–15 cm) long and wide, broadly triangular with a flat base and a pointed tip, coarsely serrate, glossy dark green. The flattened petiole (leaf stalk) causes the leaves to tremble and flutter in the lightest breeze, producing the characteristic rustling sound. Bark is pale grey and smooth on young trees, becoming deeply furrowed and grey-brown on mature trunks. Dioecious — male and female trees are separate. Female trees produce prolific cottony seeds in spring that fill the air with white, fluffy masses — the cotton is a nuisance in urban areas, clogging window screens, air conditioners, and gutters. Male trees (cottonless) are recommended for landscape use. Wood is weak and brittle — storm damage is frequent. Roots are aggressive and invasive — seeking water lines, septic systems, and foundations. Native to floodplains and river bottoms across eastern North America. Short-lived for a large tree — 70–100 years.

Native Range

Populus deltoides is native to eastern North America, from southern Quebec west to Alberta and south to Florida and Texas. It occurs on floodplains, river bottoms, sandbars, and lake margins from near sea level to approximately 5,000 feet (1,500 m).

Suggested Uses

Riparian restoration and large-scale erosion control on floodplains and river banks. Windbreaks on agricultural land. Rapid shade on large rural properties. NOT suited to residential landscapes, urban streets, or sites near infrastructure due to root invasion, cotton production, weak wood, and massive size. In the Pacific Northwest, native east of the Cascades in riparian corridors.

How to Identify

Identified by the large, broadly triangular (deltoid) glossy leaves on flattened petioles that flutter in wind, the pale grey smooth bark aging to deeply furrowed, and the cottony seeds (female trees). Distinguished from P. tremuloides (quaking aspen) by the much larger leaves (3–6 inches vs 1.5–3 inches) and the larger tree size. Distinguished from P. nigra by the triangular (not diamond-shaped) leaf base.

Appearance

Size & Dimensions

Height60' - 100'
Width/Spread40' - 60'

Reaches mature size in approximately 20 years

Colors

Flower Colors

Foliage Colors

Fall Foliage Colors

Bloom Information

Bloom Period

~3 weeks
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F
M
A
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Pendulous catkins appear in March–April before leaf emergence. Male catkins are reddish, 3–4 inches (8–10 cm) long. Female catkins develop into strings of green capsules that split to release cotton-covered seeds in May–June. Wind-pollinated. Seed viability is short — 1–2 weeks.

Detailed Descriptions

Flower Description

Reddish (male catkins)

Foliage Description

Glossy dark green

Growing Conditions

Sun Requirements

Requires 6-10 hours of direct sunlight daily
• Full Sun: 6+ hours of direct sunlight
• Partial Shade: 3-6 hours of direct sunlight
• Full Shade: Less than 3 hours of direct sunlight

Soil Requirements

pH Range5.0 - 7.5(Neutral)
357912
Drainagemoist

Water & Climate

Water Needs

High

Frost Tolerance

hardy

Time to Maturity

5-10 years for shade

Care & Maintenance

Care Guide

Not recommended for residential landscapes due to aggressive roots, weak wood, and cotton production (female trees). Where planted, site in full sun in moist, deep soil, pH 5.0–7.5. Tolerates flooding, clay, and compacted soil. Space 40+ feet (12+ m) from structures and utilities. Growth is rapid with consistent moisture. If planting intentionally, select male (cottonless) cultivars such as 'Siouxland'.

Pruning

Prune in late winter. Remove dead, broken, and crossing branches. The weak wood requires regular structural pruning to reduce storm damage risk. Remove suckers from the base and root zone. Do not top — topping produces dense, weak regrowth.

Maintenance Level

high

⚠️ Toxicity Warning

Non-toxic