Poinsettias will bloom year after year if you care for them properly. The Michigan State University Cooperative Extension Service published a fantastic, simple chart that details how to make a poinsettia reflower. Simply, in March, remove the flower and cut stems to 6 inches. In June, repot the plant in a larger pot. Then plant it (in the pot) outside. In July, pinch off the lateral shoots. In late August, take the plant inside. From September 20th to December 1st, keep your poinsettia
on Dec 09, 2012
I am so highly allergic to these that when new co-workers (knowing I'm an avid gardener) ask
me how to care for them I tell them to first pick off all the bracts, use a mixture of 1/2 cup distilled water, 2 tablespoons of either ammonia or vinegar and 1/4 cup of salt and leave them outside if it was going to be near freezing or below, they'd give me an odd look, my cubicle partner (or various other workers who knew me well) would bust out laughing saying "don't you know she's the reason poinsettias aren't allowed on the floor? She's telling you how to kill them!" I can't go into a lot of stores this time of year b/c I start too sneeze, if there's a lot I begin to wheeze and if any of the pollen gets on me or I brush a leaf I get a terrible rash.