Many of the gardens at Tower Hill have been purposefully designed to allow the professional staff a chance to paint a fresh scene, and create a new mood, each year with artful plant combinations. These annual and seasonal changes require all the skills that define the field of horticulture – the combination of the art and science of growing plants. It’s not enough to simply choose colors that look good together in the nursery in April – many other factors go into selecting combinations that will go from alluring in April to awe-inspiring in August. Spend an hour on Saturday, February 18 beginning at 1 pm with Horticulture Director Joann Vieira learning about where the horticulture team at Tower Hill derives their inspiration for fresh displays; how they balance the science of growing plants with the art of color and texture; and how space and time influence their choices. Free with admission, but registration requested at www.towerhillbg.org.  Photo from www.media.masslive.com.