Lamp Type and Irradiance Level for Daylength Extensions Influence Flowering of Campanula carpatica `Blue Clips', Coreopsis grandiflora `Early Sunrise', and Coreopsis verticillata `Moonbeam'
Authors:
Catherine M. Whitman
Catherine M. WhitmanDepartment of Horticulture, Michigan State University, E. Lansing, MI 48824