Chappaqua: The Taconic Garden Club. Topic: “Provocative Perennials.” Speaker: Ellen Zachos. Discover some of the best varieties for form, color and texture, and learn which plants do best in sun and shade. Free. 7:30 p.m. Chappaqua Public Library, 195 S. Greeley Ave. 914-238-4779.
Spring Valley: Become Acquainted with Rockland County’s Water Birds. Speaker: Lorrie Pallant of the Rockland Audubon Society. Free. 7 p.m. Finkelstein Memorial Library, 24 Chestnut St. 845-352-5700.
Hopewell Junction: Hopewell Garden Club Meeting. Lynn Eriksen, perennial manager at Sabellico Greenhouse and Florist, will lead a workshop on forcing bulbs. Participants will receive a kit for forcing paperwhites. There will be tulip and extra paperwhite bulbs available for purchase. Reservations. $7. 10 a.m. East Fishkill Community Library, 348 Route 376. 845-221-9943.