Several events related to gardening are scheduled for the near future. These include the annual flower and garden show of Bittersweet Hill Nurseries, Davidsonville, Md., the 1977 Philadelphia Flower and Garden show, the annual Williamsburg Garden Symposium sponsored jointly by the American Horticultural Society and the Colonial Williamsburg Foundation, Historic Garden Week of the Garden Club of Virginia, during which 200 houses and gardens will be open to the public, and a Greenhouse Benefit Sale by the Audubon Naturalist Society, Chevy Chase.

The theme of the Bittersweet show is "Storybook Gardens." Five gardens will depict childhood stories.

The Nightingale will be a Chinese garden using dwarf conifers and broadleaf evergreens; Tale of Peter Rabbit garden will include many of the new dwarf vegetable plants; colorful shade-loving annuals surrounding a waterfall and pool will highlight the Frog Prince garden; Queen's Croquet Ground from Alice in Wonderland will be adorned with roses and colorful annuals; and a reflection pool with decoratively arranged potted plants of spring will represent the Myth of Narcissus.

A large collection of scented geraniums, potted herbs, dwarf conifers (some suitable for starting bonsail), 6-inch English boxwood plants suitable for roof gardens, window boxes and small gardens, and grape vines suitable for desserts, wines and preserving, will be on display (and for sale).

The Bittersweet show will be held March 17 through 20 from 10 a.m. until dark. The public is invited and admission is free. On Thursday, the 17th, the show will be exclusively for the physically handicapped, so they may enjoy it leisurely and without a crowd.

To get to Bittersweet Hill Nurseries from Washington, take Route 50 to the Davidsonville Road exit (Route 424), go about 2 miles on 424 and start looking for the nurseries sign.

The Philadelphia Flower and Garden Show will be held at the Philadelphia Civic Center, 34th and Civic Center Blvd., March 13 through 20, from 10 a.m. to 6 p.m. Sundays and from 10 a.m. to 9:30 p.m. Monday through Saturday. Tickets are $3.50 for adults, $1.50 for children under 12.

The show will occupy over 190,000 square feet with 78 major exhibits.

The Williamsburg Garden Symposium will be March 27 through April 1. Reservations may be made by writing Mrs. Peggy Saboll, Registrar, Goodwin Bldg., Williamsburg, Va. 23185.

Garden Symposium registration should be made in advance and must be accompanied by a check for $75 per person, which covers lectures, tours of Colonial Williamsburg gardens, exhibition buildings, teas, clinics, workshops, and concerts, but not the Gardener's Banquet, other meals, lodging or bus transportation for the James River tour.

There will be workshops, panels, teas, a special crafts film festival, candlelight concerts, bird walks, visits to famous James River plantations, and tours of Colonial Williamsburg's buildings and gardens. World traveler Elizabeth M. Bryce will explore the flowers of 10 countries through her own arrangements, and Colonial Williamsburg's Libbey Hodges will present insights into flower arranging in the 18th-century manner.

Historic Garden Week, sponsored by the Garden Club of Virginia, will be held from April 23 through May 1. All of the proceeds are used to restore the grounds and gardens of historic shrines in the state. In many of the 33 areas open for this year's garden week, home-cooked luncheons, featuring old Virginia recipes, will be provided by church and community groups.

A 136-page guidebook giving dates and detailed information on the private homes and gardens that will bw open may be obtained free of charge from the Historic Garden Week Headquarters, 12 East Franklin Street, Richmond, Va. 2319.

Audubon Naturalist Society will hold its Benefit Plant Sale April 23 and 24, 10 a.m. to 4 p.m. at Woodend, headquarters of the society, 89-40 Jones Mill Rd., Chevy Chase. Money raised will be used to help promote the society's Environmental Education Program.