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American Sycamore

Platanus occidentalis

Use caution near homesKansas nativeLarge tree

The white-boned giant of Kansas creek bottoms — massive, fast, and strong for its size. In cool wet springs anthracnose browns and drops the first flush of leaves; the tree almost always shrugs it off.

Height
70–100 ft
Spread
60–80 ft
Lifespan
150–250 yr
Growth
Fast
A massive sycamore trunk beside a river, bark flaking away to bone-white patches

Identification

What to look at

Three features settle most identifications: the bark on the trunk, the leaf in your hand, and whatever the tree is dropping.

  • A broad maple-like sycamore leaf with shallow lobes
    The leafBroad and shallowly lobed, felty underneath when young.
  • A fallen sycamore seed ball resting on wood mulch
    The seedThe buttonball: a hard seed sphere on a long stalk that drops whole, then breaks apart.

How to identify it

  • Upper bark peels to smooth, bone-white patches
  • Broad maple-like leaves, felty when young
  • Round seed balls hanging singly on long stems
  • Massive straight trunk; ours are among the state's biggest trees

Where it grows

Native range
Native to eastern and central North America and found along Kansas creeks and rivers. Several of the largest trees in the state, by trunk diameter, are sycamores.
Soil
Wants deep, moist bottomland soil and tolerates periodic flooding. Struggles on thin, dry uplands and shows scorch in drought.
Sunlight
Full sun
Drought & heat
Moderate drought tolerance, high heat tolerance.

Spectacular where it has room — parks, acreages, creek lines. On a standard city lot it will eventually dominate everything, roots to roof.

Root behavior

Wide, shallow, and vigorous wherever moisture is available — a genuine risk to walks, drives, and sewer laterals on a standard city lot. This is a tree that needs room below ground as much as above.

Storm and branch-failure risk

Good for its size, with strong wood and sound structure. The risk is scale rather than weakness: anything that does come down off a mature sycamore is very large.

Overall storm resistance: Good. Assessing damage after a storm

Kansas pests and diseases

  • Sycamore anthracnose

    Cosmetic

    In cool, wet Kansas springs it browns and drops the entire first flush of leaves, which looks catastrophic. The tree almost always pushes a healthy second flush by early summer and carries on.

  • Lace bugs

    Cosmetic

    Fine white stippling on the upper leaf surface with dark specks underneath, worst in hot late summers. Cosmetic on an established tree.

  • Twig and seed-ball litter

    Manageable

    Sheds bark plates, twigs, and hard seed balls year round. Not a health issue, but a constant one for anything parked or paved beneath it.

Full profiles in the pest library

Photographs, seasonal timing, treatment options, and the point past which the tree cannot be saved.

Seeing something not listed here? Work from the symptom instead

Pruning

Best windowDormant season — November through February

Little needed beyond deadwood and clearance. Resist the urge to prune out anthracnose damage in spring — the tree refoliates on its own and the pruning does nothing for the disease.

Planting near homes

Use caution near homes

Avoid on a standard lot. Spectacular in a park, on an acreage, or along a creek, but on a typical city lot it eventually dominates everything from the roofline to the sewer line.

When removal may be necessary

  • It has outgrown the site and roots are damaging a foundation, drive, or lateral
  • Extensive trunk decay above a target

Removal is a judgment call about risk, not a formula. A tree with one of these conditions over open lawn is a very different situation from the same tree over a driveway — and that judgment needs someone on site.

Kansas Tree Guide is an independent educational resource. Nothing on this site replaces an on-site assessment by a qualified arborist or tree-care professional. Last reviewed August 2026.

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