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Red, pink, white and green are the basic colors of poinsettia (Euphorbia pulcherrima) bracts.

Specifically, the bracts are modified leaves that protect the dainty, inconspicuous flower. Given the correct altitude and latitude and the appropriate range of temperature, nutrition, moisture and light intensity, the plant will initiate flowering any time that it undergoes 12 hours 20 minutes of uninterrupted darkness for five (5) days straight. Flower bud initiation is accompanied by initiation of a color change in the normally green bracts.

The flowers are yellow. The leaves are green. The original, basic color options for the bracts are pink, red, and white. But many more shades and colors are available nowadays what with over 100 cultivated poinsettia varieties.

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14y ago

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