January 2010 issue of the Cornell Flower Bulb Research Program Research Newsletter:
As a part of the Flower Bulb Research Program at Cornell University, we conducted a calla lily study in summer 2008 (see Research Newsletter, Dec. 2008) evaluating plant growth regulator (PGR) drench effects of calla lily growth and development. A follow-up study was conducted in summer 2009 to further evaluate PGR drenches and dips and their effects on calla growth and development during greenhouse production.