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Plains 'Jeronimus' Poplar (cottonwood)

Populus deltoides subsp. monilifera

Compiled by · Reviewed against the 2024 Front Range Tree Recommendation List, CSU Extension & Plant Select® · Updated 2026-09-17

Plains 'Jeronimus' Poplar (cottonwood) (Populus deltoides subsp. monilifera) is a Colorado-native tree suited to the Colorado Front Range, rated "Recommended" on the 2024 Front Range Tree Recommendation List. It matures to about 50–70 ft tall and 40–60 ft wide, fast-growing, needs medium water, and prefers full sun. Too big for small yards; Choose male cultivar.

Site fitRecommended
Colorado nativemedium water50–70 ft tall and 40–60 ft wideZones 2–3 (keep it back from the house)Deer-resistant

Photos

At a glance

Will it survive here?

Hardiness zones
USDA 3–8
Water needs
medium water
Sun
Best in full sun.
Soil
clay, loam, sandy
Soil pH
6.0–8.2
Hail tolerance
moderate
Wind tolerance
low
Salt tolerance
moderate
Firewise (defensible space)
Zones 2–3 (keep it back from the house)
Tolerates
Rain gardens

How big, what shape?

Mature size
50–70 ft tall and 40–60 ft wide
Mature form
Spreading
Spacing / clearance
~60 ft of clearance
Growth rate
Fast
Lifespan
Short-lived

What it looks like, and when

Fall color
Gold, yellow
Foliage
Deciduous

Who else benefits

Pollinator value
low
Deer
Generally deer-resistant
Colorado native
Yes
Native ecoregion
riparian, shortgrass prairie

Common problems on the Front Range

  • Cytospora canker
  • Poplar and aspen borers
  • Leaf spot and rust in wet springs

These are general tendencies for this group of plants on the Front Range, not a diagnosis. Many are stress-driven and preventable with good siting and watering. For a specific plant or an active problem, consult a certified arborist or your local CSU Extension office.

Frequently asked questions

Is Plains 'Jeronimus' Poplar (cottonwood) good for the Colorado Front Range?
Yes, Plains 'Jeronimus' Poplar (cottonwood) is a well-suited tree for Colorado's Front Range, rated "Recommended" on the 2024 Front Range Tree Recommendation List.
How big does Plains 'Jeronimus' Poplar (cottonwood) get?
It matures to about 50–70 ft tall and 40–60 ft wide.
How much room does Plains 'Jeronimus' Poplar (cottonwood) need?
Give Plains 'Jeronimus' Poplar (cottonwood) about 60 ft of clearance from buildings, fences, and other trees so the mature canopy isn't crowded.
What shape does Plains 'Jeronimus' Poplar (cottonwood) grow into?
Plains 'Jeronimus' Poplar (cottonwood) typically grows into a wide, spreading habit, broader than it is tall, give it room and keep it back from buildings. This is the species' usual mature form, named cultivars (columnar, weeping, or compact selections) can differ, so check the specific cultivar.
Is Plains 'Jeronimus' Poplar (cottonwood) hardy on the Front Range?
Plains 'Jeronimus' Poplar (cottonwood) is hardy in USDA 3–8. The Colorado Front Range spans roughly USDA 4b–6a, so it is well within range.
How much water does Plains 'Jeronimus' Poplar (cottonwood) need?
It needs medium water once established.
How fast does Plains 'Jeronimus' Poplar (cottonwood) grow?
Plains 'Jeronimus' Poplar (cottonwood) is a fast-growing tree. Growth rate depends on water and site conditions on the Front Range.
How long does Plains 'Jeronimus' Poplar (cottonwood) live?
Plains 'Jeronimus' Poplar (cottonwood) is relatively short-lived for a tree, so plan to replace it sooner than a long-lived shade tree. Actual lifespan varies with site, water, and care.
What color does Plains 'Jeronimus' Poplar (cottonwood) turn in fall?
Plains 'Jeronimus' Poplar (cottonwood) turns gold and yellow in autumn. Fall color intensity varies with the season and site on the Front Range.
Is Plains 'Jeronimus' Poplar (cottonwood) native to Colorado?
Yes. It is a Colorado native.
Is Plains 'Jeronimus' Poplar (cottonwood) deer-resistant?
Plains 'Jeronimus' Poplar (cottonwood) is generally considered deer-resistant, though no plant is deer-proof when browse pressure is high.
Is Plains 'Jeronimus' Poplar (cottonwood) a good firewise plant near the house?
Plains 'Jeronimus' Poplar (cottonwood) is suitable in defensible-space zones 2–3, best kept back from the house rather than in the area right against the structure. This is general suitability guidance based on CSU Extension firewise plant lists, not a guarantee that any plant won't burn, a well-irrigated, well-maintained plant is the goal. Follow CSU Extension defensible-space guidance and check with your local fire district before planting in the wildland-urban interface.
Is Plains 'Jeronimus' Poplar (cottonwood) prone to pests or disease on the Front Range?
Plains 'Jeronimus' Poplar (cottonwood) can be affected by cytospora canker and other issues common to this group on the Front Range. These are general tendencies, not a diagnosis, many are stress-driven and preventable with good siting and watering. For a specific plant or an active problem, consult a certified arborist or CSU Extension.

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