Involves black bagging and a cold place, or was it warm, then some other process, can't remember the details, bit of a pain to do, tried it once years ago, never again - google it, there's instructions there on how to get it to produce more red bracts

http://www.ecke.com/html/h_corp/corp_pntcare.html#rebloom

This will help if you have a read, Jan. And as Bamboo says you can google search and there are loads of links there for care of Pointsettas. Good luck!