Margaret Rosasco Harrison, 92, who lived in Washington for about 90 years, died of congestive heart failure Saturday at the Powhatan Nursing Home in Falls Church.

Mrs. Harrison was born in Baltimore and moved to Washington at an early age. She left the District Schools after completing the eighth grade in order to help her parents in the family grocery business.

She delivered groceries to embassies then located in the Thomas Circle area and also worked at the old Center Market at Seventh and B streets NW.

She was the widow of Judson O. Harrison Sr., the owner and operator of a Washington wholesale produce firm who died in 1955.

Mrs. Harrison was official hostess for the national conventions of the Wholesale Fresh Fruit and Vegetable Distributors Association conventions held in Washington in the 1930s. During this time her husband was president of the association.

She had spent winter months in Florida from 1943 through the 1960s. She also traveled abroad extensively until she was in her mid 80s.

Mrs. Harrison did volunteer work at a number of area hospitals and nursing homes.

She is survived by two sons, Dr. Malcolm D., of Washington, and Judson O. Jr., of McLean; five grandchildren, and two great-grandchildren.