As the daughter of a gamekeeper and a resident of rural east Kent, much of her work reflects an environment of farming, botanical gardens and country life.

[2][3][nb 3] An early patron was Henry George Herbert Milles-Lade (1940–1996), the 5th Earl Sondes of Lees Court, and Stringmans Farm, Badlesmere, Kent, where, from at least 1954, Fountain's father Peter was head gamekeeper for many years,[4] running "one of Britain's best shoots".

[7] Works by Fountain have been varied and include the Baptismal Roll (2000) which is an illustrated manuscript now kept at Selling Church, Kent, and portraits of Nigel Nicolson and Claire Palley.

Work now in the possession of the National Trust Foundation for Art includes projects at Sissinghurst Castle Garden, Nymans, Stoneacre, Barrington Court and Mompesson House.

[10] In 2013, Fountain created a backdrop for Jim Marshall's Malmaison Carnations exhibit, which won a gold medal at the Hampton Court Flower Show.

[17] At the 2015 Chelsea Flower Show, Fountain produced backdrops for irises bred by Cedric Morris, for the Howard Nurseries' Gold Medal exhibit in the Grand Pavilion.

[30] Fountain's work is included in the permanent collections of the Museum of Modern Art, Wales,[7][34] and the National Trust for Places of Historic Interest or Natural Beauty,[35] whose pieces by Fountain are kept in the following locations: Mompesson House, Wiltshire;[36][30] Sissinghurst Castle Garden;[37] Nymans Estate, West Sussex;[38] Mount Stewart, County Down;[39] and Barrington Court, Somerset.