CONTENTS THE BUSINESS MAGAZINE FOR COMMERCIAL GROWERS MAY 2019 | VOLUME 29, NUMBER 5 42 On the Cover 'SpinTop Red' gaillardia has been a consistent trial performer with its compact habit, durability and saturated deep red blooms. Turn to page 42 to learn about more perennial performers. (Photo: Dümmen Orange) DEPARTMENTS 40 FEATURES 14 40 Under 40 The Class of 2019 - Meet This Year's Fab 40 The industry is in for a brilliant future as this year's class paves the way to tomorrow. By Tim Hodson 32 Production Setting Up a Cannabis Grow The cannabis market is becoming increasingly appealing for growers. What considerations should be made before diving into cannabis cultivation? By Christopher Machnich 36 Plant Health It's Whitefly Time: How to Update Your Rotation Program Battling whiteflies is a constant challenge for growers. Selecting the right products with different modes of action is the first step in winning the battle. By Anna V. Chapman 4 MAY 2019 GPNMAG.COM 48 40 Culture Report Opening the Door to Seed Salvia This premium looking Salvia nemorosa 'Salvatore Blue' finishes early for key spring sales. By Cor De Jong COLUMNS 12 6 Editor's Report 8 Industry News 10 Chat Room 48 Variety Spotlight 49 Classifieds/Ad Index gpn GREENHOUSE PRODUCT NEWS Perspectives Automation Isn't Always the Answer By Casey Stanton 42 Vaughn's View Perpetual Perennial Performers - 2018 Trials By Vaughn Fletcher 50 Technically Speaking DLI 'Requirements' By Erik Runkle Heat-Loving and Hardy Standouts p. 36 INSIDE: Bacterial Disease Update Addressing Invasive Species Vertical Farming APRIL 2019 GREAT AMERICAN MEDIA SERVICES GPNMAG.COM Miss our April issue? It's now available to view on gpnmag.comhttp://www.GPNMAG.COM http://www.gpnmag.com http://www.GPNMAG.COM