1 named cultivar

‘Siouxland’Siouxland Cottonless Poplar

treeN. America Native

Eastern Cottonwood

The Story

Plant Bio

Populus deltoides, eastern cottonwood, is a very large fast-growing deciduous tree native across the eastern, central and southwestern United States and into Canada, typically found on floodplains and riverbanks. It reaches seventy-five to a hundred feet with a broad open crown. Glossy triangular leaves flutter audibly on flattened stalks, and female trees release masses of cottony seed in early summer.

Growth is exceptional — several feet a year on damp ground — and it tolerates flooding, drought, salt and urban conditions, which is why it colonises disturbed riversides so readily. That speed comes with brittle wood, a short life by tree standards, and aggressive roots, so it belongs well away from buildings, drains and paving.

Uses & Benefits:

Fast, airy shade with glossy leaves that flutter and rustle in the lightest breeze.

Stabilises riverbanks and establishes on wet, saline or disturbed ground where most trees fail.

A larval host for viceroy and tiger swallowtail butterflies; mature trunks provide cavity nesting for birds.

Essentials

At a Glance

Plant Type

Tree

Height

1050 inches

Width

570 inches

Light

Full Sun

Zones

4, 5, 6, 7, 8, 9

Water

Moderate to high

Humidity

Moderate

Lifespan

Perennial

Native To

Central and eastern North America

Toxicity

Non-toxic

Planting

How to Grow

Plant in autumn or early spring in deep, moist soil.
Choose full sun and a site with plenty of room.
Keep it at least fifty feet from buildings, drains and paving.
Water through the first season; established trees rarely need it.
Remove weak, crossing or damaged limbs early to build structure.
Inspect after storms, as the wood breaks easily.

Pro Tip

Plant a male selection where you can: female trees shed enough cottony seed to clog gutters, filters and air conditioners for weeks.

Keep It Thriving

Care Guide

Do

Give it a large open site well away from structures 🌳
Use it for fast shade or shelter on damp ground 💧
Prune young trees to build sound branch structure ✂️
Check for storm damage after high winds 🔍

Don't

Plant near drains, foundations or paving ❌
Expect a long-lived specimen tree ❌
Plant a female tree near a pool or air conditioning unit ❌

Seasonal Care Calendar

Task	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Monitor
Prune

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Fast shade or shelterbelt on a large propertyRiverbank and floodplain stabilisationNaturalised riparian planting

Companion Plants

Black Willow Silver Maple Buttonbush Red Twig Dogwood Switchgrass

Multiply

Propagation Methods

Good to Know

Common Questions

Eastern Cottonwood questions

What zones can Eastern Cottonwood grow in?

Eastern Cottonwood is hardy in USDA Zones 4–9. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.

Is Eastern Cottonwood deer resistant?

Not reliably. Deer may browse Eastern Cottonwood, especially tender spring growth — plan on repellents or fencing where pressure is high.

When does Eastern Cottonwood bloom?

Eastern Cottonwood typically blooms in spring through early spring. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.

Does Eastern Cottonwood need full sun?

Eastern Cottonwood does best in full sun (6+ hours).