Why Leaves Change Color in Fall

Introduction

Fall colors are not paint. They are pigments that were always in the leaf but hidden by green chlorophyll.

The Focus Keyword: fall leaf color change

Fall leaf color change happens when shorter days reduce chlorophyll production, allowing other pigments to show.

The Pigments Behind the Colors

• Chlorophyll is green and dominates in summer.
• Carotenoids create yellow and orange.
• Anthocyanins create red and purple in some trees.

What Triggers the Shift

Cool nights and shorter days slow chlorophyll. Sugars build up, and some trees produce anthocyanins, which deepen reds.

Why This Matters

Leaf color timing affects tourism, local ecosystems, and even fire risk. It also signals how trees respond to climate shifts.

Conclusion

Leaves change color because chlorophyll fades, revealing other pigments. Weather patterns decide how bright the show will be each year.

Quick Recap

• Short days reduce chlorophyll.
• Other pigments become visible.
• Weather shapes the intensity.