Ewart studied violin with John Carrodus and made her début as a violinist at age 14 at the Albert Hall, London.

She won one of the first twelve Birmingham scholarships to the South Kensington National Training School, later the Royal College of Music, and continued her studies in Leipzig and Berlin with Joseph Joachim.

In December 1898, she married Alfred James Ewart, whom she had met in Leipzig, at the parish Church of St. Paul, Oxford.

In 1906 the Ewart family moved to Melbourne, Australia, and a rheumatic condition ended Florence's career as a violinist.

In 1907 she served as co-conductor for the first Australian Women's Work Exhibition, and won first prize for her composition "God Guide Australia",[1] an anthem with words by Annie Rattray Rentoul.