Here’s are weekly garden calendar. Note the three good plant sales on Saturday. And on Sunday, Copamong Pond is a wonderful 12-acre woodland garden around a 12-acre pond. I’ve seen it twice.

May 17
Somers: Ninth District of the Federated Garden Clubs of New York State Standard Flower Show. Theme: “Welcome Aboard the Hogwarts Express. Free. 10 a.m.-3:30 p.m. Lasdon Park and Arboretum, Route 35. 646-853-4402.

White Plains: Make Your Own Compost. Buy a compost bin and get free advice on gardening. $20, $40. 9 a.m.-2 p.m. Saxon Woods Pool, 1800 Mamaroneck Ave. 914-813-5420.

Somers: Friends of Lasdon Annual Plant Sale. 9:30 a.m.-3:30 p.m. Lasdon Park and Arboretum, Route 35. 914-864-7268.

Southeast: Master Gardener Plant Sale. Master gardeners will answer questions and conduct soil PH tests. Free. 8:30 a.m.-12:30 p.m. Tilly Foster Farm and Conservation, 100 Route 312. 845-278-6738.

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

May 18
Armonk: Garden Conservancy’s Open Days Program. Self-guided tour of private woodland garden. $5 per garden. 10 a.m.-4 p.m. Cobamong Pond, 15 Middle Patent Road. 888-842-2442.

Somers: Ninth District of the Federated Garden Clubs of New York State Standard Flower Show. Theme: “Welcome Aboard the Hogwarts Express. Free. 10 a.m.-3 p.m. Lasdon Park and Arboretum, Route 35. 646-853-4402.

May 21
Pawling: Quaker Hill Native Plant Center Tour. A tour of the plant center in Pawling. Lunch at McKeever’s Restaurant. Sponsor: Native Plant Center at Westchester Community College. Registration. $100. 9 a.m.-4:30 p.m. Native Landscapes and Garden Center, 991 Route 22. 914-606-7870.

May 24
Chappaqua: Garden Conservancy’s Open Days Program. Self-guided tour of this private garden featuring extensive collections of rhododendrons, azaleas, tree peonies, and clouds of reseeding forget-me-knots. $5. 2-6 p.m. Rocky Hills, 95 Old Roaring Brook Road. 888-842-2442.

May 31
West Haverstraw: Adapted Gardening. Free. 1 p.m. Helen Hayes Hospital, Route 9W. 845-786-4873.
June 8
Yorktown Heights: Edible Weeds and Wildflowers in Your Backyard. Instructor: Margaret von der Meden, backyard farmer and farm-based educator. Dress appropriately for garden work. Registration. $10. 3-4 p.m. Hilltop Hanover Farm and Environmental Center, 1275 Hanover St. 914-980-6375.

June 10
White Plains: Greater Westchester Orchid Society Meeting. $25 membership. 7 p.m. Ethical Culture Society of Westchester, 7 Saxon Woods Road. 973-420-4966.