Plant Dormancy Science: Why Trees Drop Leaves

Biology of Fall Foliage

A sophisticated survival strategy evolved over millions of years.

Photoperiod Trigger

Trees sense day length through phytochromes, triggering hormonal changes.

Color Changes

• Chlorophyll (green) breaks down
• Carotenoids (yellow/orange) revealed
• Anthocyanins (red/purple) produced fresh
• Tannins (brown) appear last

Abscission Layer

Corky barrier seals branch, cuts off leaf water supply.

More Articles

7 Best Parsley Substitutes | TheHomeSprouts Cannabis Toxicity in Cats: Vet-Reviewed Risks & Safety Steps 7 Fresh Basil Uses Beyond Pesto | TheHomeSprouts How To Repot A Cactus Plant Parsley Identification Guide: Curly vs Flat-Leaf (2026) Snake Plant Sizes: Complete Growth Guide | TheHomeSprouts 5 Reasons Orchid Flowers Droop | TheHomeSprouts Grow Peace Lilies in Water: 5 Steps | TheHomeSprouts Succulent Weed Yield? Why Cannabis Isn’t a Succulent Grow Fresh Mint at Home: 5 Easy Steps | TheHomeSprouts