George J. Hochmuth, Professor Emeritus at the Soil and Water Sciences Department, University of Florida, Gainesville, Florida, USA, and Fellow of the American Society for Horticultural Science. Throughout his career, his areas of specialization included fertilization of commercial vegetables, row crops, and specialty crops. Rebecca G. Sideman is an Extension Professor in the Department of Agriculture, Nutrition & Food Systems, University of New Hampshire, Durham, New Hampshire, USA. Her research interests include horticultural crop production, season extension, sustainable agriculture, and plant breeding and genetics.