Poinsettias bloom in response to shortening daylight hours. If you wish to coax your poinsettia to bloom in time for the holidays, you will need to put the plant in total darkness for at least twelve hours (fourteen is better) each night for approximately ten weeks (this also applies to forcing Christmas Cacti to bloom). Late September or early October is a good time to begin this regimen. You can place your plant inside a box, a cupboard, or a closet to achieve complete darkness. Be sure to bring your plant out during the day and place it in a bright, sunny spot. After it flowers, gradually decrease the water until the bracts all drop, then allow the plant to dry out completely (like many of the euphorbias, this is a desert plant). Store in a place with cooler temperatures (50 degrees); remember we are trying to recreate a Mexican Winter, so a 50 degree basement or garage makes a fine location.
AlohaHow do you make a pointseta bloom?
A pointseta will bloom without doing anything to it, but if you want it to bloom around Christmas you must put in a totally dark area in October.
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