Photoperiodism

Photoperiodism

Have you ever noticed that some flowers only bloom in spring or that certain plants lose their leaves as the days get shorter? That’s because of something called photoperiodism! Photoperiodism is how plants respond to the length of day and night. Plants don’t just need sunlight, th...

How do plants know exactly when to bloom or shed leaves? They don’t need a calendar—they track the seasons naturally.

Plants respond to changes in the length of day and night, a process called photoperiodism.

They use special light-sensitive chemicals to measure how long they have been in the dark.

When the timing is right, pl...