Buttonball
Platanus occidentalis
Last reviewed: June 2026
Platanus occidentalis (American Sycamore) is a large deciduous tree native to eastern North America that blooms April through May. This fast-growing riparian species tolerates wet soils and provides habitat for various pollinators including beetles and flies.
The USDA PLANTS Database (opens in new tab) does not flag Buttonball as toxic to livestock.
Light
full sun
Water
medium
Size
600"–1200" H × 300"–600" W
Bloom
Apr, May
Native to
AL, AR, CT, DE and 30 more states
Pollinators
beetles, flies
Browse plants for this ecoregion
American sycamore is a massive native shade tree that can reach 50-100 feet tall with distinctive mottled bark that peels to reveal white, tan, and gray patches. It produces round seed balls and large maple-like leaves that turn yellow-brown in fall. This tree needs plenty of space and is best suited for large properties.
Growing Buttonball
Grow Buttonball in full sun and medium water. Mature plants reach 600 to 1200 inches tall and spread 300 to 600 inches wide. Expect high maintenance to keep it looking intentional in a front yard.
In an HOA neighborhood
Buttonball takes more care to keep looking intentional in a front yard. Maintenance level: high. Consider it for backyard or mid-zone beds rather than the street edge.
Works well in: backyard only.
- Extremely large size inappropriate for most residential lots
- Drops large amounts of leaves, bark, and seed balls creating maintenance issues
- Shallow root system can damage sidewalks and foundations
Wildlife value
Supports beetles and flies during its spring bloom period. The large size and longevity make it valuable habitat for birds and other wildlife.
Common questions
- Where does Platanus occidentalis naturally grow?
- American Sycamore is native to much of the eastern United States, from Maine south to Florida and west to Nebraska, Kansas, Oklahoma, and eastern Texas.
- When does American Sycamore bloom?
- Platanus occidentalis typically blooms in April and May, producing small spherical flower clusters that develop into the characteristic buttonball seed heads.
- What pollinators visit American Sycamore?
- The flowers of Platanus occidentalis are primarily pollinated by beetles and flies, which are attracted to the small clustered blooms.
- What growing conditions does American Sycamore prefer?
- This tree thrives in full sun to partial sun with medium to high moisture levels. It naturally grows along streams, floodplains, and other wet areas but adapts to various soil conditions.
- Is Buttonball toxic to livestock?
- The USDA PLANTS Database does not flag Buttonball as toxic to livestock.
- Is Buttonball HOA-friendly?
- Buttonball takes more care to look intentional in a front yard. Consider it for backyard or mid-zone beds rather than the street edge.
Native range data from the USDA PLANTS Database and regional native plant society lists. Pollinator and host plant associations compiled from GBIF, iNaturalist, and published ecological literature.
Ready to grow Buttonball? Add it to your garden in Pollinator Patch to track it and get season-by-season care guidance.
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