Every year people ask me, "why haven't the leaves fallen yet ... deciduous trees bed down for winter in three stages. The first of these starts in early autumn and is linked to a chemical ...

Every autumn we revel in the beauty of the fall colors. The mixture of red ... the length of daylight and changes in temperature, the leaves stop their food-making process. The chlorophyll breaks down ...

It’s autumn, and that means the leaves on the trees are ... Christmas tree in December. So they do fall off! That’s because the tree has been cut down and cannot uptake water anymore.

Chlorophyll is the green chemical that captures the sunlight and this breaks down in autumn, showing the other colours underneath. The leaves fall, thousands of tons of them and three members of a ...