If you've spotted a tree with mottled, camouflage-patterned bark and wondered whether it's a London plane tree or an American sycamore, you're not alone - the two are so closely related that even experienced gardeners mix them up. This page covers exactly how to tell a London plane tree apart from a sycamore, what to expect as it matures, and how to care for one if you're planting or maintaining one on your own property. The London Plane is a hybrid of the American sycamore (Platanus occidentalis) and Oriental plane (Platanus orientalis), and that hybrid vigor is exactly why it's become one of the most widely planted street and park trees in North America.
In short:
• A London plane tree is a hybrid of American sycamore and Oriental plane - its olive-green, mottled bark and paired (not single) fruit balls are the fastest way to tell it apart from a straight sycamore.
• Mature size is 70–100 feet tall and 65–80 feet wide, reached at a medium growth rate (~35 feet in the first 20 years).
• It's more disease-resistant than American sycamore, especially against anthracnose, which is why cities plant it so heavily along streets and in parks.
• It needs full sun and plenty of room to grow, it's a poor fit for small residential lots but excellent for large properties, parks, and street plantings.
London Plane Tree vs. Sycamore: How to Tell Them Apart
The fastest way to tell a London plane tree from an American sycamore is the bark. A London plane's outer bark flakes away in patches all the way down to the roots, revealing an olive-green inner layer underneath the cream and tan the "camouflage" look. A sycamore's bark does the same flaking, but the inner layer shows more white, cream, and gray, and older sycamores keep a thick band of dark, non-exfoliating bark low on the trunk that a London plane doesn't have.
The fruit is the second giveaway. Both trees produce round, fuzzy seed balls about 1 to 1½ inches across, but a London plane almost always carries two seed balls per stalk, while an American sycamore carries just one. If you're looking up at a tree and can count the balls on each stalk, that's often the quickest confirmation.
Leaves are the least reliable identifier since both are lobed and maple-shaped, but a London plane's leaf sinuses (the notches between the lobes) tend to cut deeper than a sycamore's. Size is a supporting clue, not a rule: American sycamore can grow considerably taller, up to around 140 feet in ideal conditions, while London plane tops out closer to 70–100 feet, but young trees of either species can be hard to size up with confidence, so lean on bark and fruit first.
Location is a useful shortcut, too. If you're looking at a large, mottled-bark tree along a city street, in a park, or lining a parking lot, it's more likely a London plane, cities favor it specifically because it tolerates pollution and compacted soil better and resists anthracnose more reliably than straight American sycamore. Sycamores are more often found growing wild near streams, rivers, and bottomlands east of the Great Plains.
London Plane Tree Basics (Platanus x acerifolia)
The London Plane is a hybrid of the American sycamore (Platanus occidentalis) and Oriental plane (Platanus orientalis). This handsome tree, belonging to the family Platanaceae, is particularly well adapted to urban conditions. This handsome tree needs plenty of space to grow and is suitable for large properties only. While London Planes tend to be as messy as their American cousins, dropping bark and fuzz balls all season, they are more resistant to disease.
London Plane trees typically grow from 70 to 100 feet tall and spread 65 to 80 feet at maturity. Growing at a medium rate, these trees will reach about 35 feet or so over their first 20 years. They have a pyramidal shape in youth but develop huge branches that open out as they age. As they grow, they shed their bark in large patches, creating mottled trunks of cream, tan, and olive green, a sort of camouflage pattern with brown flecks.
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| American Sycamore on left; London Plane Tree on right |
This tree have large, coarse, lobed leaves. Resembling maple leaves in shape, they have 3 to 5 sharply pointed lobes and may measure up to 6 to 8 inches long and 8 or 10 inches across. Sometimes they are broader than they are long.
They have smooth, dull medium green surfaces and paler undersides with hairy veins. They emerge in late spring, most dropping in December, although a few may persist until very late winter.
Male and female flowers occur on the same tree, usually on separate stems. This tree flowers emerge in late May or early June about the same time that the leaves show. Both male flower and female flowers are formed in round clusters about 1 inch in diameter and are yellowish-green and inconspicuous.
These clusters develop over the season into ball-shaped seed balls that are brown and fuzzy. About 1 to 1½ inches around, they are green at first, turning brown as the seeds within mature. These balls hang on the tree, two or three to a stalk, through the fall and much of the winter before beginning to shed the seeds in the spring. They are not attractive to wildlife.
London Plane Tree Choices
Bloodgood is a popular variety of the London Plane. It is a hybrid of the American sycamore and Oriental plane tree, also known as the American plane, and is particularly well adapted to urban conditions. Somewhat smaller than the American sycamore, it has slightly smaller leaves and a more greenish tinge overall. It bears its fuzzy fruitballs in distinctive pairs from a common stalk. The London Plane is one of the very few tree species that will survive in selected locations within all fifty states of North America.
Columbia or Liberty London tree varieties are also good options for the home landscape.
With its majestic presence and adaptability to urban environments, the London Plane tree remains a favored choice for large properties, parks, and city streets, where it can thrive and provide substantial shade. These trees, part of the genus Platanus, are not only aesthetically pleasing but also functionally beneficial in combating air pollutants. This widely planted species ensures that the tree grows successfully in various environments across the country.
Growing Conditions and Care for London Plane Trees
London plane trees need full sun, at least 6 hours of direct light a day to develop their characteristic pyramidal-then-spreading shape and resist stress-related disease. They're remarkably adaptable below ground: they tolerate clay, loam, and sandy soils, handle acidic through alkaline pH, and are comfortable in anything from consistently moist to occasionally wet, well-drained conditions. This soil flexibility, combined with strong tolerance for urban air pollution and compacted soil, is exactly why the London plane became the go-to street tree for major cities.
Because these trees eventually reach 70 to 100 feet tall and 65 to 80 feet wide, the biggest care consideration is simply giving them enough room from day one they're not a fit for small residential lots, foundations, or narrow parking strips. Once established, they need very little supplemental care beyond occasional structural pruning while young to encourage a strong central framework as the huge mature branches develop.
Pests and Diseases of London Plane Trees
London plane trees are more disease-resistant than American sycamore, but they're not immune. The most serious threat is canker stain, a fungal disease that can be fatal and spreads through pruning wounds always prune in dry weather and sanitize tools between cuts. They can also develop anthracnose, canker, leaf spot, and powdery mildew, though at much lower rates than straight sycamores, which is the main reason London plane replaced sycamore as the preferred urban shade tree. Common insect pests include borers, scale, Japanese beetles, caterpillars, and mites none of which are usually serious enough to threaten a mature, healthy tree, but young or stressed trees should be monitored more closely. Choosing a disease-resistant cultivar like 'Columbia' or 'Liberty' (see the Choices section below) further reduces disease risk from the start.
Common Questions About London Plane Trees
What's the difference between a London plane tree and a sycamore?
A London plane tree is a hybrid of American sycamore and Oriental plane, distinguished mainly by its olive-green mottled bark, paired seed balls (versus a sycamore's single seed ball per stalk), and stronger resistance to anthracnose disease. Sycamores can grow taller up to 140 feet versus a London plane's 70 to 100 feet, and their exfoliating bark shows more white and gray tones. London planes are also far more common in cities and parks, since they tolerate pollution and compacted soil better than straight sycamore.
How long do London plane trees live?
London plane trees are exceptionally long-lived, with many specimens easily surviving 100 to 150 years in typical urban conditions. Under favorable growing conditions with room to mature, individual trees have been documented living 200 to 400 years some of London's oldest planted specimens date to the 1680s and are still alive today. Their longevity, combined with disease resistance and pollution tolerance, is a major reason they're planted as long-term street and park trees rather than short-rotation shade trees.
How tall do London plane trees grow?
London plane trees typically reach 70 to 100 feet tall and spread 65 to 80 feet wide at maturity. They grow at a medium rate, reaching roughly 35 feet within their first 20 years, then continuing to fill out in height and spread for decades afterward. Because of this eventual size, they need a large, open planting site they're best suited to parks, streets, and large properties rather than small residential yards.
When do London plane trees leaf out?
London plane trees leaf out in late spring, with their large lobed leaves emerging around the same time the tree flowers in late May or early June. Most of the leaves drop by December, though a portion can persist on the tree into late winter before finally falling. This late, extended leaf-drop pattern is normal for the species and not a sign of stress.
The London Plane Tree Is Sycamore's Tougher, City-Ready Cousin
A London plane tree is a hybrid of American sycamore and Oriental plane, best identified by its olive-green mottled bark, paired seed balls, and much stronger resistance to disease than a straight sycamore. That disease resistance and tolerance for pollution, compacted soil, and a wide range of soil types is exactly why it's become the default large shade tree for cities, parks, and expansive properties rather than smaller yards. If you're planting one, the only real requirement is space full sun and 65 to 100 feet of eventual room in every direction after that, it largely takes care of itself for a century or more. Watch young trees for canker stain and prune only in dry weather, but beyond that, this is a low-maintenance tree built to outlast the people who plant it.
