The changing colors of leaves is one of the best parts of fall—but what determines which colors will appear?
Leaves change color as the trees stop making chlorophyll, the sun-absorbing molecule that is vital to photosynthesis and gives them their green hue. As the green pigment of the leaves fades, we begin to see the other pigments present.
While some of the panoply of fall hues in a forest depends on factors like weather and geography, different tree species tend toward certain colors when their chlorophyll-green leaves are exposed to the shorter days of fall.
Here are nine species—some well-known, others slightly more obscure to the non-tree nerds among us—to watch out for if you want to see a full rainbow of foliage colors this fall.
- Aspen
- Black Gum
- Sugar Maple
- “Canada Red” Chokecherry
- Sassafras
- Bradford Pear
- Katsura Tree
- American Beech
- Maple-Leaf Viburnum
Aspen
Colorado’s favorite tree turns a brilliant gold as the weather cools. Genetics play a role in determining when leaves change colors due to the chemical balance within the leaves. Because aspens reproduce by cloning (through a root system that expands underground), you can see which trees are genetically identical—if there are a bunch of bright yellow trees standing out in a forest that’s still largely green, that probably means those trees are all clones.
Black Gum
Also known as the black tupelo tree, Nyssa sylvatica is one of the first trees to show its fall colors each year. Before it becomes a solid mass of bright red, its leaves can turn purple, yellow, and orange [PDF].
Sugar Maple
This common tree (whose leaf serves as the Canadian national symbol) turns a host of different colors at the same time. Its leaves turn yellow, orange, red, and every hue in between. Acer saccharum is native to many parts of the eastern United States and Canada.
“Canada Red” Chokecherry
“Canada Red” is a cultivar of the native North American chokecherry tree (Prunus virginiana). It starts out the year with green leaves, but by summer they turn purple; once fall comes, they morph from red to reddish purple, ensuring a broad range of colors throughout the year.
Sassafras
Sassafras albidum, the tree that lends root beer its flavor, makes for a spectacular fall display. Its three-lobed leaves can turn yellow, orange, red, and even a pinkish color in autumn.
Bradford Pear
Miss the boat on your fall foliage road trip? The Bradford pear, a landscape tree originally native to China and Vietnam, is one of the last trees to change colors in the fall, morphing into a luscious maroon. Don’t get too attached to these trees, though, and definitely do not plant them in your yard if you live outside their native range: They’re considered invasive in the U.S., and are actually banned in several states, where people are encouraged to cut them down.
Katsura Tree
Cercidiphyllum japonicum, a flowering tree native to Japan, turns bright yellow and pinkish red during the fall. Moreover, when its leaves finally drop, the tree has a sweet aroma that passersby liken to burnt sugar or cotton candy.
American Beech
This tall tree, found in forests throughout eastern North America, features golden brown foliage in the fall; a color offset by its pale white bark.
Maple-Leaf Viburnum
Viburnum acerifolium is technically more of a bush than a tree (it’s related to honeysuckle), but its fall colors make up for its small stature. Late in the year, its sharp leaves turn pinkish-purple.
Read More About Fall Foliage:
A version of this story originally ran in 2015; it has been updated for 2024.