Conquer the Soil profiles 45 hidden figures of horticulture--the Black men and women whose accomplished careers in the plant world are little known or untold. Among them are Wormley Hughes, an enslaved African-American who was head gardener at Monticello and dug Jefferson's grave; Annie Vann Reid, an ex-teacher turned entrepreneur in South Carolina who owned a five-acre greenhouse and nursery in the 1940s that sold millions of plants and seeds;...