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Landscaping & Nursery Information for Home Gardeners
 

TANNIN

The browns in leaves after all colors have disappeared is caused by the pigment tannin. Tannin is present throughout the growing season but masked by the chlorophylls (greens), xanthophylls and carotenes (yellows and oranges), and anthocyanin (reds and purples).

Tannins are used in leather refining processes.
 
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