The Macfarlane Greenhouses, the New Hampshire Agricultural Experiment Station, and the Thompson School horticultural facility at UNH will host the popular Poinsettia Trials Open House Thursday, Dec. 5 through Saturday, Dec. 7, 2013. Visitors to the free event, now in its eighth year, will enjoy more than 100 poinsettia varieties and assist in ongoing research. Click here for more information.