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American basswood

American basswood

Tilia americana
A medium-to-large native shade tree of central and eastern North America, reaching 50 to 80 feet with an ovate-rounded crown and large, asymmetric heart-shaped leaves. In June it carries pale-yellow, intensely fragrant flowers on pendulous cymes - each cluster hung from a distinctive strap-like leafy bract - that ripen into pea-sized nutlets. The fragrant June bloom is a premier nectar source: Missouri Botanical Garden lists it as attracting bees and butterflies, and the Lady Bird Johnson Wildflower Center flags it as having special value to both native and honey bees.
Native: 38 US states + 4 CA provinces
Climate fit: broad (90/100)
Structure
Focal point
Pollinator
Light
Full sun / Part sun / Part shade
Water
Moderate water
Mature size
50-80 ft tall · 40 ft apart
Hardy in zones
2a-8b
brutally cold to frosty winters
AHS heat range
1-9
Plant range authored in AHS heat-zone terms.
Native in Illinois
Yes

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A documented larval host for the Eastern comma and 1 other species - caterpillars feed on its foliage before becoming the next generation.

Cold hardiness

These values are location-based: this location's current hardiness is the baseline, and the 2050 value is a projected future climate for this same location.
Now
Zone 6b
Plotwright
USDA Zone 6b
-5°F to 0°F
Well-suited
Zone 7a
Plotwright
0°F to 5°F
Well-suited
In plain terms: This location has cold winters. Its winters are projected to keep warming through 2050.
Well-suited today and still thriving in 2050.

Heat tolerance

Heat tolerance values are location-based too: heat days today are observed at this site, and the 2050 value projects this same location under a future climate.
Loading AHS heat-zone data for this location...

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Focal point
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Shrub
Full sun / Part sun / Part shade
Consistent moisture
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Structure
Focal point
Pollinator

Educator packet

Plant packet
American basswood educator packet
A medium-to-large native shade tree of central and eastern North America, reaching 50 to 80 feet with an ovate-rounded crown and large, asymmetric heart-shaped leaves. In June it carries pale-yellow, intensely fragrant flowers on pendulous cymes - each cluster hung from a distinctive strap-like leafy bract - that ripen into pea-sized nutlets. The fragrant June bloom is a premier nectar source: Missouri Botanical Garden lists it as attracting bees and butterflies, and the Lady Bird Johnson Wildflower Center flags it as having special value to both native and honey bees.
Scientific name
Tilia americana
Plant type
tree
Hardiness
2a-8b
Light
full-sun, part-sun, part-shade
Moisture
moderate
Spacing
480 inches
Classroom prompts
- Which plant traits are observations, and which are care recommendations?
- How would this plant fit change if the garden location moved warmer, colder, wetter, or drier?
- Which source-backed facts would you cite in a lesson handout?
Use the Sources & citations section below for page citation styles and the field-level source list.

Sources & citations

Cite this page
For lesson plans, articles, or research that uses this page. Use the source cards below to explore the references that informed this record.
Plotwright. (2026, May 17). American basswood (Tilia americana). Retrieved 2026, August 20, from https://plotwright.com/plants/tilia-americana
Sources used for this record
This record is compiled from the sources below.
Missouri Botanical Garden PlantFinder
Botanical research database
USDA PLANTS Database
Government data source
Plants of the World Online (POWO)
Botanical research database
Wikimedia Commons
Photo · CC BY-SA 2.0
Lady Bird Johnson Wildflower Center Native Plant Database
Botanical research database