The collection conists chiefly of correspondence, diaries, notebooks, scrapbooks, business and estate records, writings, lectures, and gardening papers. Correspondents include family members such as Lionel Edward Sackville-West, Victoria Sackville, Harold Nicolson, and Nigel Nicolson, and friends and lovers including Rosamund Grosvenor, Hilda Matheson, Gwen St. Aubyn, and Christopher St. John. Writings include typescripts and manuscripts for works including the novels The Edwardians and All Passion Spent. Gardening papers include horticultural catalogs, files on the National Trust's garden committee, and research materials. The collection documents Vita Sackville-West's family life, love affairs with women including Christopher St. John and Gwen St. Aubyn, her literary life and circle, including both Sackville-West's work and that of friends including Virginia Woolf, and the management of the Sissinghurst Castle estate and gardens.