CONTENTS THE BUSINESS MAGAZINE FOR COMMERCIAL GROWERS JULY 2024 | VOLUME 34, NUMBER 7 41 16 FEATURES 6 Lighting Research Supplemental lighting strategies Let your plants control the conditions By Suyun Nam, Marc W. van Iersel and Rhuanito S. Ferrarezi 12 Technology Transforming with automation Experts weigh in on the latest technology By Heather Machovina 16 CAST 2024 Remarkable releases for 2025 Introductions to consider for next year By Heather Machovina 28 CEA The importance of canopy ventilation Managing vapor pressures in CEA By Walter Stark 34 Climate Control Enhancing greenhouse management 35 Variety Information New take on smooth hydrangeas A renewed focus on production friendly By Heather Machovina 48 Plant Health Setting ground rules Regulation of biostimulants By Dean Peterson 54 BIG GROWER 41 Great Lakes Growers Hydroponic farming Leading the way in sustainable lettuce growing By Keith Loria COLUMNS 52 54 Culture Report Grama grass By Jonathan Babikow 58 Technically Speaking Why crops don't flower (on time) By Erik Runkle A1 Special Advertising Section Grower's Guide: Professional Growing Media and Biologicals Miss our June issue? It's now available to view on gpnmag.com GREENHOUSE PRODUCT NEWS 3 On the Cover 'First Editions FlowerFull Smooth' is a new, production-friendly smooth hydrangea from Bailey Nurseries. Photo courtesy of Bailey Nurseries. DEPARTMENTS 4 Editor's Report 47 Product Showcase Perspectives Turning a lifelong education into a business By Hannah Brookfield 60 Product Marketplace 65 Industry News/Events 66 Classifieds/Ad Indexhttp://www.gpnmag.com