Coffee trees are mostly described according to their kinds. Robusta coffee is more robust (resilient) than the Arabica trees, but produces an inferior tasting beverage with higher caffeine content. The white coffee flower has five petals and a scent resembling that of jasmine. The flowers last only 2-3 days. The coffee berries are cherry-sized and green at first, turning dark red later on. The ripening takes eight months. The coffee tree starts flowering at 2-4 years old and it can simultaneously have flowers and berries in all stages of development. The coffee tree can grow to heights of 10 meters if not pruned, but producing countries will maintain the coffee at a height reasonable for easy harvesting. The coffee tree requires a mean temperature of 66-77 degrees Fahrenheit. Thus, the coffee tree is a tropical plant. The coffee plant cannot stand frost but does not die from an occasional cold night. It needs lots of water, requiring annual rainfall of 59 inches.
Source: http://www.rarecoffee.com/school/coffeetree.asp
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