She moved to Canada in 1911 with her husband and business partner Howard Dunington-Grubb where they founded Sheridan Nurseries.

The profession was not taught in England at the time, but she managed to acquire the knowledge through private lessons and technical courses.

In Toronto they also designed the grounds of the Old Mill Tea Room, the Humber Valley Surveys and the 15-acre Chorley Park.

[9] They hired Sven Herman Stensson to run the nursery, whom they found through an advertisement in an English paper.

The first seasonal garden centers were opened in the early 1920s near the Yonge and Bloor intersection in what is now downtown Toronto and on Southdown Road in Mississauga.

[14] She also gave lectures on housing and town planning at the University of Toronto and on city beautification for the Ontario Department of Agriculture.

[3] Due to their business, the Dunington-Grubbs mixed with the Toronto elite such as the Eaton, Massey and Gooderham families, hosting and attending important social events.

[14] The Dunington-Grubbs were at the center of a small group of landscape artists that used to meet in the garden of the Diet Kitchen Restaurant, on Bloor Street.