Books by Helen Philbrick

Helen Philbrick (1910-2011) worked with Richard Gregg and Evelyn Speiden Gregg to experiment with companion planting in the Gregg's own garden. She wrote extensively on the subject. Richard Gregg was an early pioneer of companion planting. In the 1940s, he and Evelyn Speiden Gregg used their own garden to experiment with different plants.