Does not it look like someone has been around here with a paintbrush? Just look at the intense colors in this red maple. You have to wonder how does a leaf that has been green all through the spring and summer suddenly turn into these shades of red. Well, before we get to that, I think it is nice to know that North America is one of the best places to have beautiful autumn displays because of the unique climate and rich diversity of trees. We have this tapestry of fall color.
So how does this change occur? Well, let us start first with the color yellow. You see, leaves are green because of chlorophyll and it is constantly being produced and breaking down all at the same time. Until in the fall when chlorophyll production slacks off, that is when the yellow pigments in the leaf are revealed. A good example of this is the Gingko tree.
Now, some of the best-known trees for their rich oranges and reds are the oaks, gums and various maples. What you are seeing here are the complex sugars and other chemicals that have built up or have been trapped in the leaves. Well, we have been talking about a complex chemical reaction that goes on in here but it is about lot more than that. You see, it is also about the whether. For the best fall display, plants need plenty of moisture during the summer. Then in the fall, they need cool nights under 45 degrees followed by days that are clear and bright then they can really show of.
From the garden, I am Allen Smith. If you would like more information on this topic or any other gardening topic, just check out my website pallensmith.com.
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