PlantsPopulus→Swamp Cottonwood (Populus heterophylla)

Common names:
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Give a thumbs up Swamp Poplar

General Plant Information (Edit)
Plant Habit: Tree
Life cycle: Perennial
Sun Requirements: Full Sun
Water Preferences: Wet
Wet Mesic
Mesic
Soil pH Preferences: Very strongly acid (4.5 – 5.0)
Strongly acid (5.1 – 5.5)
Moderately acid (5.6 – 6.0)
Slightly acid (6.1 – 6.5)
Neutral (6.6 – 7.3)
Minimum cold hardiness: Zone 5a -28.9 °C (-20 °F) to -26.1 °C (-15 °F)
Maximum recommended zone: Zone 9b
Plant Height: 40 - 50 feet
Plant Spread: 30 - 40 feet
Leaves: Unusual foliage color
Deciduous
Fruit: Other: little brown capsules release cottony seed
Fruiting Time: Spring
Late spring or early summer
Flowers: Inconspicuous
Flower Time: Spring
Suitable Locations: Street Tree
Uses: Shade Tree
Wildlife Attractant: Birds
Resistances: Flood Resistant
Propagation: Seeds: Self fertile
Sow in situ
Pollinators: Wind
Containers: Not suitable for containers
Miscellaneous: Tolerates poor soil
Dioecious

The seeds are just starting to emerge from the seed pods, spreadi

Photo gallery:
Location: Denver Metro CODate: 2014-06-09The seeds are just starting to emerge from the seed pods, spreadi
By Skiekitty
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Location: Natural Wetlands in Northeastern IndianaDate: 2011-10-03These Specimens Less Than 25 Years Old
By chelle
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Location: Denver Metro CODate: 2014-05-29Before these pods open up & spit out the white cottony seeds ever
By Skiekitty
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Location: Morton Arboretum on west side, in Lisle, ILDate: 2016-07-18maturing planted trees
By ILPARW
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Location: Morton Arboretum west side in Lisle, ILDate: 2016-07-18mature trunk with bark
By ILPARW
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Location: Natural Wetlands in Northeastern IndianaDate: 2011-10-03Showing Poplar Rust - Common Among This Species
By chelle
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Location: Morton Arboretum in northeast IllinoisDate: 2016-07-18summer leaves
By ILPARW
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Location: Morton Arboretum in Lisle, IllinoisDate: 2016-07-18summer foliage
By ILPARW
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Location: Morton Arboretum in Lisle, IllinoisDate: 2016-07-18leaf
By ILPARW
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This plant is tagged in:
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Comments:
Posted by ILPARW (southeast Pennsylvania - Zone 6b) on Jan 7, 2018 8:57 PM

This Swamp Cottonwood is an uncommon tree species. It grows in swamps and bottomlands in a strange native range that starts along coastal Connecticut & southeast New York and goes down the Atlantic Coast to just barely into Georgia, then some spots in northwest Florida, then along the Mississippi River from Louisiana into southern Illinois, then southwest Indiana, then spots in northern & central Indiana and Ohio, and a few spots in far south Michigan. Its favored sites in the wild have wet soil that is acid of pH 4.5 to 6.0 with a good amount of clay in it, but it is adaptable to a number of soils with a pH that is neutral and mesic in uplands, where I found three trees planted on the west side of Morton Arboretum in the Willow Family Collection. It grows in more waterlogged soils than the much more common Eastern Cottonwood.

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Discussion Threads about this plant
Thread Title Last Reply Replies
id? by KentPfeiffer May 11, 2018 1:00 AM 1
Did cottonwoods get merged? by Bonehead May 10, 2018 8:52 AM 4

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