May 2
Yonkers: Flower Festival. Maypole dance, learn about the famous Dutch tulip, and sample the wares of at flower and bake sale. Free. noon-3 p.m. Philipse Manor Hall State Historic Site, 29 Warburton Ave. 914-965-4027.

Cos Cob: 48th Annual May Gardeners’ Market. Free. 9 a.m.-2 p.m. Garden Education Center of Greenwich, 130 Bible St. 203-869-9242.

Ossining: Adding Natives to Your Landscape. Registration. $20. 1 p.m. Teatown Lake Reservation, 1600 Spring Valley Road. 914-762-2912.

Yorktown Heights: Growing a Victory Garden. Speaker: Anna Snider. Topic: which vegetables are the best to grow for maximum value in a limited amount of space. Registration. $10. 10 a.m. Hilltop Hanover Farm and Environmental Center, 1275 Hanover St. 914-962-2368.

May 6
Ardsley: Ardsley Garden Club Standard Flower Show: School Days. Free. 2-8 p.m. St. Barnabas Episcopal Church, Heatherdell and Revolutionary roads. 914-693-6193.

Patterson: Floral Arranging. Instructor: Deborah O’Connor. Registration. Free. 7 p.m. Patterson Library, 1167 Route 311. 845-878-6121.

Scarsdale: Garden Section Standard Flower Show: “The Enchanted Sea.” Free. 2-6 p.m. Scarsdale Woman’s Club, 37 Drake Road. 914-723-5021.

May 7
Brewster: Plant Sale. Free. 10 a.m.-6 p.m. First United Methodist Church, 81 Main St. 845-279-7611. Also May 8, 9.

Katonah: Plant Patch Sale. Flowers, vegetables, herbs. 9 a.m.-6 p.m. St. Luke’s Episcopal Church, 68 Bedford Road. 914-232-5220. Also May 8-10.

May 8
Ossining: Nature Friendly Plant Sale. Featuring habitat-friendly wildflowers, unique annuals and perennials, deer-resistant flowering shrubs, vegetables, herbs and other native plants. May 8: $5; May 9 free. 4-7 p.m. Teatown Lake Reservation, 1600 Spring Valley Road. 914-762-2912.

May 9
Armonk: Green Acres Garden Club Plant Sale. Free. 9:30 a.m.-2 p.m. Byram Hills High School, 12 Tripp Lane. 914-273-9736.

Ossining: Nature Friendly Plant Sale. Featuring habitat-friendly wildflowers and unique annuals and perennials, deer resistant flowering shrubs, vegetables, herbs, and other native plants. May 8: $5; May 9 free. 9 a.m.-2 p.m. Teatown Lake Reservation, 1600 Spring Valley Road. 914-762-2912.

Peekskill: Garden Club of Peekskill Plant Sale. Free. 9 a.m.-2 p.m. Riverfront Green Park, Route 9 and Hudson Avenue. 914-736-2000.

Pleasantville: Pleasantville Garden Club’s Annual Plant Sale. Free. 8-11:30 a.m. Pleasantville Memorial Plaza, Marble Avenue. 914-747-0486.

Valley Cottage: Container Gardening. Speaker: Master gardeners from Cornell. Topic: demonstration of easy techniques for growing annuals, perennials, herbs, vegetables and more that are perfect for small spaces. Free. 10-11 a.m. Valley Cottage Library, 110 Route 303. 845-268-7700.

May 12
Rye: Master Gardeners Home Gardening Lecture Series. Speaker: Karen Bussolini. Topic: “Elegant Silvers.” $12 in advance, $15 at the door. 10 a.m.-noon The Osborn, 101 Theall Road. 914-285-3590.

May 13
New Rochelle: Garden Club of New Rochelle Flower Show. Theme: “Golden Oldies.” Free. 2 p.m. Elks Lodge, 19 The Boulevard. 914-630-0111.

May 16
Southeast: Putnam Master Gardener Plant Sale. Free. 8:30 a.m.-12:30 p.m. Tilly Foster Farm and Conservation, 100 Route 312. 914-310-1260.

Upper Nyack: Garden Club of Nyack Annual Plant Sale. 10 a.m.-2 p.m. Katzenstein residence, 507 N. Broadway. 845-358-0534.

Yorktown Heights: How to Plant and Transplant Crops. Speaker: Mary Ellen Sheehan. Registration. $5. 10 a.m. Hilltop Hanover Farm and Environmental Center, 1275 Hanover St. 914-962-2368.

Somers: Friends of Lasdon Annual Plant Sale. 9:30 a.m.-3:30 p.m. Lasdon Park and Arboretum, Route 35. 914-864-7263.

May 20
Chappaqua: Pressed Plant Art-Going Beyond the Predictable. Presented by the Chappaqua Garden Club. Free. 12:45 p.m. First Congregational Church, 210 Orchard Ridge Road. 914-242-3799.

May 21
Mahopac: Gardening in the Shade. Speaker: Representative from Cornell of Putnam. Topic: perennials, annuals, shrubs and trees for areas of shade in your garden. Registration. Free. 7 p.m. Mahopac Public Library, 668 Route 6. 845-628-2009.

May 27
Yonkers: The Return of Bluebirds. Sponsor: Hudson River Audubon Society of Westchester. Free. 7:30 p.m. Lenoir Nature Preserve, 19 Dudley St. 914-237-9331.

May 30
West Haverstraw: Adapted Gardening Workshop. Topic: learn about adapted gardening tools and techniques. In MacArthur Park at the hospital. Free. 1-4 p.m. Helen Hayes Hospital, 51-55 Route 9W. 845-786-4950.