CONTENTS THE BUSINESS MAGAZINE FOR COMMERCIAL GROWERS JUNE 2020 | VOLUME 30, NUMBER 6 36 On the Cover Breeders continue to innovate the begonia category. One new introduction is the 18 FEATURES 18 2020 California Spring Trials The Show Must Go On While the trek down the California coast was not physically possible this year, the exhibitors still had tons of material to share with growers for the upcoming season. Here are some highlights from their virtual displays! By Jasmina Dolce 28 Production How Much Could Hemp Benefit from Supplemental Light? Research with grow lights could help growers improve propagation and production of hemp, resulting in higher cannabinoid yields. By Dave Kuack 32 Management Who Has the Power? Knowledge is power, and if you have an impressive crop and want to see its success at all levels, that message must be brought to the consumer. By Amanda Huntington 34 Hot Tropics Let's Talk Pandemic & Horticulture In these unprecedented times, growers must prepare for the unpredictable season ahead. By Andrew Britten 4 JUNE 2020 GPNMAG.COM 38 36 Culture Report Primula 'Oakleaf Yellow Picotee' This unique new perennial is an easy, carefree cultivar that provides cheerful blooms over oak-leaf shaped foliage. By Kathy KcKay COLUMNS 12 The Houseplant Utopia By Allison Zeeb 14 Duets Greenhouse and Vertical Farm Food Production: Cultivar Selection, Plant Breeding and Seed Quality By Peter Konjoian and Michelle Klieger 38 Vaughn's View Exceptional 2021 Annual Introductions By Vaughn Fletcher Miss our May issue? 42 Technically Speaking UV-Transmitting Greenhouse Glazing By Erik Runkle It's now available to view on gpnmag.com Groovy boliviensis series from Benary, which would have been on display at this year's California Spring Trials. Turn to page 18 to learn more. (Photo: Benary) DEPARTMENTS 6 Editor's Report 8 Industry News 10 Chat Room 41 Classifieds/Ad Index Perspectiveshttp://www.gpnmag.com http://www.GPNMAG.COM