The annual Landon Garden Festival will be held May 6-9, 11 a.m. to 7 p.m., at Landon School, 6101 Wilson Lane, and the annual Washington Cathedral Flower Mart will be held May 6, 11 a.m. to 6 p.m., rain or shine, at the Cathedral.

Admission to both is free to the public

Proceeds from the Landon Garden Festival will go into the school's scholarship fund and toward the purchase of a new greenhouse for the propagation of wildflowers.

Proceeds from the Cathedral Flower Mart will be used for upkeep of the Cathedral grounds and gardens and for scholarships in horticultural management.

The annual Landon event used to be called the Landon Azalea Tour because of the very large number of azaleas. "The tour has been enlarged to a festival," says a spokeswoman for the school, "and we would like to think we will have everything for the gardener and the garden. It is really the one place where you can totally equip yourself to grow a beautiful and unusual garden. As in the past, the beautiful blooming azalea garden will be the main feature."

For sale will be a complete line of Burpee seeds, plants of vegetables and annual and perennial flowers, a list of wildflower plants, rose bushes, baked goods including many national dishes such as baklava, and all sorts of garden gadgets.

Authorities will be on hand to provide planting information.

Ninety species of potted wild flowers, perennials and ferns will be on sale. Members of the wild flower committee rescue plants from areas threatened by development and propagate them. Included are wild French strawberry, Black Eyed Susan, Jack in the Pulpit, Cyripedium acaule, the pink ladyslipper, and Cypedium pubescans, the yellor Ladyslipper.

There will be a wide range of activities at the Cathedral Flower Mart, including children's games, clowns, carousel rides, a silent auction and a costume exhibit. More than 25 booths will compete for sales and popular votes in beauty appeal.

Herb plants, flower seedlings, garden pottery and a new line of needle-point kits, cookies and cakes, lobster rolls, soft pretzels and hot bread, will be on sale.

The tote bab, cinnamon spice silk scarf and rainy-day umbrella designed by Betty Gordon also will be on sale. Box luncheons or afternoon tea can be purchased in th Bishop's Garden.