Hawthorne: Native Plant Center appreciation weekend. Rosedale Nurseries hosts weekend-long benefit for the Native Plant Center at WCC. 9 a.m. to 5:30 p.m. Also Sept. 8. With expert shoppers and free talks at 11 a.m. Saturday (Attracting Birds to Your Garden with Native Plants), 2 p.m. Saturday (Native Shrub and Tree Identification) and 1 p.m. Sunday (Beneficial Plants for Butterflies), 51 Saw Mill River Road. 914-606-7870 (NPC), 914-769-1300 (Rosedale).
Lewisboro: Open Day. Tour the White Garden. 10 a.m. to 3 p.m. 199 Elmwood Road. Admission is $5 per garden. For directions and descriptions of the gardens: www.gardenconservancy.org or 845-424-6500.
North Salem: Open Day. Tour the garden of Dick Button — Ice Pond Farm. 1 to 6 p.m. Admission is $5 per garden. The gardens of Dick Button. For directions and descriptions of the gardens: www.gardenconservancy.org or 845-424-6500.
Briarcliff Manor: “Sense-ational Flowers — Floral Designs for Casual Lifestyles,” with Leah Waybright Kennell, instructor of floral design at the New York Botanical Garden and curator of Wildflower Island at Teatown Lake Reservationin Ossining. Presented by the Briarcliff Manor Garden Club. 11:45 a.m. Free. Briarcliff Recreation Center, 48 Macy Road. www.briarcliffmanor gardenclub.com. 914-432-8529.
Greenburgh: 11th Annual Fall Flower Show. Sponsored by the Parkway Gardens/Parkway Homes Garden Club, the show will feature flora designs, table artistry, horticulture and floral specimens from community members; some items for sale. Judging by National Garden Club judges on Friday morning. Free. Open to the public: 2:30 to 7 p.m. Also Sept. 14: 10 a.m. to noon. Town Hall, 177 Hillside Ave., 914-428-8513.
Cos Cob, Conn.: Sixth Annual Dazzling Dahlias Show. Sponsored by the Garden Education Center of Greenwich, the show promises the visitor a fabulous sea of exceptional blooms that range from tiny buttons to huge dinner-plate size stems in an array of stunning colors. It is truly a sight to behold. All dahlias will be sold on the final day of the show. giving the public a rare opportunity to own prize-winning blooms. Become a member of the Greenwich Dahlia Society by contacting the Garden Education Center at 203-869-9242 or www.gecgreenwich.org. Free. 1-4 p.m. Also Sept. 22: 10 a.m.-3 p.m. Garden Education Center of Greenwich, 130 Bible St. 203-869-9242 or www.gec greenwich.org.
Stony Point: Master Gardener Demonstration Garden Tours. Monthly tours of the demonstration gardens at the Cornell Cooperative Extension Education Center. Visitors can tour the beautiful gardens and learn which plants grow best in Rockland County. Gardens included are: The Ralph Snodsmith Perennial Garden; Hillside and Shade Garden; Fern Garden; Herb Garden; Ornamental Grass Garden; Cutting Garden; Container Gardens; Native Plants; and the Rain Garden. 1-2 p.m. Also Sept. 29, Oct. 27. Free. 1-2 p.m. 10 Patriot Hills Drive. 845-429-7085.
New City: Family Sundays. A family farm experience for children ages 4 and older accompanied by a parent or guardian. The program is offered on the first Sunday of the month. Activities include farm tours, a seasonal activity using natural materials and a chance to work alongside the farm team. Register at familysundaysatcropseyfarm.bpt.me Call 845-634-3167 or email firstname.lastname@example.org. $10 first child; $5 each additional child per family. 10-11:30 a.m. Cropsey Community Farm, 220 South Little Tor Road. 845-634-3167.
Chappaqua: Open Day. Tour Rocky Hills — the garden of William and Henriette Suhr. Noon to 4 p.m. 95 Old Roaring Brook Road. Admission is $5 per garden. For directions and descriptions of the gardens: www.gardenconservancy.org or 845-424-6500.
Bedford: Open Day for the garden of Judy and Michael Steinhardt. 10 a.m. to 3 p.m. Admission is $5 per garden. For directions and descriptions of the garden: www.gardenconservancy.org or 845-424-6500.