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Tn Nursery Garden Blog

Full of great gardening articles, How To's and ways to garden effective without spending a lot of unnecessary money.

​Why Do Leaves Change Colors?

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Have you ever wondered why leaves change colors in the fall on trees?

It’s a simple process actually; Simpler than you may think.

Photosynthesis is a process in which plants turn water and carbon dioxide into oxygen and sugar.

The chemical chlorophyll is what causes photosynthesis to happen. It is also the reason why leaves start out as green.

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As the days begin to get shorter and shorter leading up to the fall, the leaves start to change their colors. The lack of sunlight contributes to this process as well.During the winter when all the leaves are gone, the trees will live off their food stored in them.Not all trees will change colors in the fall. Pines, spruces, firs, hemlocks, cedars will stay green throughout the year; this is especially true in the South where broad-leaf trees will remain green throughout the fall and winter months because of the mild climate.

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Meanwhile in Northern states, the opposite may be true. The broad-leaf trees instead of staying green and staying on the trees will lose its leaves. The dead brown leaves on trees such as oaks will normally stay on the trees until spring time.As mentioned above, weather can play a role in how long fall foliage may last. Northern states are most likely to see fall foliage in early fall, that’s why many people are encouraged to enjoy it while it last because frost may hit early and often.

Image result for leaves changing colors

While in the South where the fall and winters are a bit milder, the changing of the leaves normally doesn’t happen until the middle of fall. Most of the time the South’s high temperatures may go way into the late fall, which may contribute to a late fall foliage.Because of this, it gives tourist time to enjoy the fall foliage into the latter months of the year.Temperature changes, the change from longer days to shorter days and chlorophyll, all contribute to the changing of the leaves in the fall.

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