Herbert Cowley (1885 – November 1967) was a British botanist, gardener, garden photographer and garden writer who edited The Garden journal from 1915 to the mid-1920s. He wrote many gardening books until retiring in 1936. Cowley was a member of the Kew Guild and active in the Kew Guild for Old Kewites, former and serving Kew Gardens staff. He also edited the Kew Guild Journal. After four years as journal editor or sub-editor from 1909 to 1914 and military service from 1914 to 1915, he became editor of The Garden in 1915/16 and carried on as a gardening writer until around 1936.