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Greenhouse growers cause poinsettias to bloom, change from green to bright red, white, pink or other colors in time for Christmas by carefully controlling total daytime hours of light with dark shrouds, according to Texas AgriLife Extension Service experts. (Texas AgriLife Extension Service photo by Dr. Karl Steddom)Greenhouse growers cause poinsettias to bloom, change from green to bright red, white, pink or other colors in time for Christmas by carefully controlling total daytime hours of light with dark shrouds, according to Texas AgriLife Extension Service experts. (Texas AgriLife Extension Service photo by Dr. Karl Steddom)
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At first glance, these poinsettias may look like they have a leaf disease but are actually quite healthy. The spottiness of the leaves is because they are in the interim stage of a controlled leaf color-change, according to Texas AgriLife Extension Service experts. (Texas AgriLife Extension Service photo by Dr. Karl Steddom)At first glance, these poinsettias may look like they have a leaf disease but are actually quite healthy. The spottiness of the leaves is because they are in the interim stage of a controlled leaf color-change, according to Texas AgriLife Extension Service experts. (Texas AgriLife Extension Service photo by Dr. Karl Steddom)
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