Noted horticulturalist and all-around great speaker Laura Eisner offers terrific advice about Gardening in the Shade, tonight at Elm Bank, 900 Washington Street in Wellesley. According to Yankee Magazine, there are 25 billion trees in New England, and at any given time, some of them are shading your garden. Laura will shed some light, so to speak, on how to achieve great color, texture and form in a shaded environment. Shade gardening isn’t limited to hosta: she’ll discuss specific cultivars and techniques that will allow you to achieve a dazzling multi-season display. $8 for Mass Hort members, $10 for non members, and please bring cash or a check. Refreshments will be offered. For more information log on to www.masshort.org.