Johanna St John (1631–1705)^[1] was an English gardener and herbalist, and the eldest daughter of a notable Parliamentarian, Oliver St John.^[2] She would eventually marry Sir Walter St John, a distant relative.^[2] Throughout her life, St John constructed two recipe books containing culinary, cosmetic, and medicinal recipes.^[1] She was the grandmother to the first Viscount Bolingbroke, Henry St John.^[3]

Some of this article's listed sources may not be reliable. (December 2017)

St John's father was Oliver St John, a leading Parliamentarian and supporter of Oliver Cromwell. She was raised during the time of the English Civil War. In the early months of her life, her mother, Johanna Altham, brought her to the home of Altham's stepfather, Sir William Masham, in High Laver, Essex.^[4] St John was baptized there on 27 January 1631.^[4]

In 1649, she married her distant cousin and later had thirteen children.

Lydiard Park is a 260-acre country park at Lydiard Tregoze, nearly four miles west of central Swindon, Wiltshire, England, later owned by the Viscount of Bolingbroke, Johanna St John's grandson. A set of letters between Johanna St John and her steward, Thomas Hardyman, give insight into how she learned to construct her recipe books.^[2] At Lydiard House, her summer estate, a plethora of materials and ingredients including food, herbs, and livestock gave her the raw materials she needed to craft her recipe books.^[2] St John's usage of these materials ranged from food to distilled medicines.^[2] From the letters, there is an understanding that Johanna herself did not concoct the recipes at Lydiard House, but gave "exact details to a team of distillers and herbgatherers", often collaborating with other recipe-makers in London.^[2] People she collaborated with included Sir Edward Spencer, Lady Manchester, and Lady Peterborough who all had remedies for sore eyes, and Sr. Philip Warwick who had a remedy for cramps.^[4]