Background
Johnson was the son of Joseph Johnson, a baker. His Scottish maternal grandfather John Forsyth, a florist, was the son of William Forsyth, a botanist who co-founded the Royal Horticultural Society in 1804.
Johnson was the son of Joseph Johnson, a baker. His Scottish maternal grandfather John Forsyth, a florist, was the son of William Forsyth, a botanist who co-founded the Royal Horticultural Society in 1804.
He had a family background in horticulture. Johnson had a successful career designing the grounds for a number of estates in England, Ireland and Russia. By 1869, he was the Curator of the Royal Botanic Gardens in Belfast.
He subsequently set up a landscape gardening shop on Bond Street in London.
He went to the United States of America in 1885 where he was employed by Prospect Park in Brooklyn, New York City as superintendent of horticulture. The park was overgrown and his plan was to create a number of vistas so the entirety of the large park would be visible.
This would have necessitated the removal of a large number of trees, which proved unacceptable to the community. As a result, Johnson was terminated from the project
A recommendation in 1887 by New York florist Peter Henderson convinced Joel Hurt to bring Johnson to Atlanta to work on his streetcar suburb, Inman Park.
Johnson went to Atlanta and he spent the next five years there. He joined Hurt again for Piedmont Park. In 1891, he designed Latta Park in Charlotte, North Carolina and the next year may have designed the neighborhood of Cloverdale in Montgomery, Alabama.
They had three children: Roy Albert Johnson (1886–1939), Cecil Forsyth Johnson (1887–1951), and Edwina Johnson Mundy (1891–1969).
Forsyth appeared on the British Broadcasting Corporation One genealogy television show Who Do You Think You Are? Neither side of the family knew of the other"s existence until genealogy research from the American branch brought them together. Despite the question of bigamy arising in this documentary, there is no record for Johnson"s marriage to Frances Clarke, although she is shown to have been recorded as both Frances Clarke Johnson and Frances Forsyth Johnson.
Johnson"s American family were informed that he had died while travelling to Great Britain and had been buried at sea. The reality was that he had returned to England to visit his family there, later going back to the United States.
In the next decade he visited England on several other occasions before he died in Brooklyn, New York in 1906.
Johnson was buried there at Evergreen Cemetery in an unmarked grave. He died with only $389 to his name after living for several years in a hotel, leaving no last will or testament.