Tips and Advice New York Botanical Garden, 200th Street and Southern Boulevard, the Bronx; (718) 817-8700.
Saturday and Sunday, from 11 A.M. to 4 P.M., is home-gardening weekend. Experts will offer advice. Suggested admission to the garden is $3; students, those 65 years old and older and children 6 to 16, $2. Antiques Festival Shaker Museum and Library, Shaker Museum Road off County Road 13, Old Chatham, N.Y.; (518) 794-9100, ext. 100.
A benefit antiques show will be held on Saturday, from 10 A.M. to 4 P.M. Admission is $5; children 12 and younger, $2. There will be an early buying session from 7 to 10 A.M.; tickets are $20. All Arts and Crafts Hanover Marriot Hotel, 1401 Route 10 East (near Interstate 287), Whippany, N.J.; (609) 397-4104.
Arts & Crafts Quarterly will sponsor a symposium on the arts and crafts movement on Aug. 21, from 9 A.M. to 9:30 P.M., and on Aug. 22, from 9 A.M. to 6:30 P.M. There will be visits to Craftsman Farms in Morris Plains, N.J., the home of Gustav Stickley, the furniture designer who helped establish the movement in America in the late 19th century. Symposium fee is $75.
On Aug. 20, at 6:30 P.M., there will be a party at Craftsman Farms to benefit the Craftsman Farms Foundation. Tickets are $100. Reservations are required. New York and Beyond 92d Street Y, 1395 Lexington Avenue; (212) 996-1100.
Walkings tours from $15 to $20 include Harlem (Sunday, 1 to 4 P.M.), Ellis Island (Sunday, 9:15 A.M. to 12:30 P.M.) and City Island (Aug. 29).
Day trips in August will include a tour of the Culinary Institute of America and the Vanderbilt Mansion in Hyde Park, N.Y. (Aug. 20), and the Dutchess County Fair in Rhinebeck, N.Y. (Aug. 29). Fees for day trips are $40 to $75. Reservations are required for all programs.