December 2008 issue of the Cornell Flower Bulb Research Program Research Newsletter:
With increasing production of both cut and pot calla, there are opportunities to evaluate growth and development of these newer cultivars. As a part of the Flower Bulb Research Program at Cornell University, we recently conducted three different experiments evaluating 1) the effect of planting depth on growth and development; 2) potting media type on growth and development; and 3) the effects of paclobutrazol (Bonzi) and flurprimidol (Topflor) on growth and development of calla lily.