why do trees lose their leaves in the autumn?

Why Do Trees Lose Their Leaves In The Autumn?

Last week, we discovered how and why leaves change their colour in the autumn – giving us all those beautiful reds, golds and orange leaves. But, have you ever wondered why trees let go of those leaves? Why don’t they just change colour, stay on the tree, then turn green again in the spring? In this tutorial, we will find out why trees lose their leaves.