The Friends of Hopkinton Seniors will host its annual fundraising Plant and Book Sale at the Senior Center on Friday, May 19, from 9 a.m.-2 p.m., and Saturday, May 20, from 9 a.m.-noon. A large variety of vegetables, flowers and plants grown and donated by greenhouse volunteers will be available at rock-bottom prices, along with gardening books, cookbooks, children’s books, antique books, DVDs, CDs and more. Community donations of potted vegetables, herbs, annuals and perennials are welcomed. Potted plant donations can be dropped off (in clean containers) at the Senior Center on May 17 and 18. UPDATE: Books will be sold both days, but plants will be available on Saturday only.