In autumn, green leaves suddenly burst into yellow, orange, red, and brown. But the colors were actually there all along — they were just hidden! 🍂
Why Are Leaves Green All Summer?
Leaves are filled with a green pigment called chlorophyll. This is the chemical that captures sunlight and turns it into food for the tree (photosynthesis!).
Because chlorophyll is so much greener than other colors, it hides the other pigments in the leaf during spring and summer.
The Hidden Colors
Inside every leaf are other pigments:
🟡 Carotenoids — make leaves yellow and orange (same chemical that makes carrots orange!)
🔴 Anthocyanins — make leaves red and purple (also makes blueberries blue and apples red)
Why the Color Show Starts
As days get shorter and cooler in autumn, trees know winter is coming. They stop making chlorophyll. The green fades away — revealing the yellow and orange that were there the whole time!
Some trees also produce extra red pigment as a kind of sunscreen for the leaf as it dies.
Why Trees Lose Their Leaves
Leaves are expensive to maintain — and in winter, there isn’t enough sunlight to make photosynthesis worth it. So trees drop their leaves to conserve energy until spring.
Best Color-Change Spots
🍁 New England, USA
🍁 Japanese maple forests
🍁 Bavaria, Germany
🍁 Korea’s mountains
Autumn isn’t sad — it’s actually a tree’s way of preparing to survive. 🌳
