Archive: October 19

Trees are beginning to hibernate - go outside and look at the colours!

The orange-yellow colour in the leaves (carotenoids) is actually present all year round, but the light-absorbing green chlorophyll masks the colour through the spring and summer. Now, as the trees block the stems of the leaves and prevent minerals and water flowing into them, the chlorophyll degrades and the carotenoids show through.

(Last edited Jan 13, 2017)