CONTENTS THE BUSINESS MAGAZINE FOR COMMERCIAL GROWERS SEPTEMBER 2022 | VOLUME 32, NUMBER 9 32 On the Cover Delgenius delphinium exhibit enormous hardiness, heat tolerance and strong flower stems with five colors (Breezin is shown). Find out more in this month's Culture Report on page 28. (Photo: Pacific Plug & Liner) 16 DEPARTMENTS FEATURES 14 Trade Shows Creating a Brighter Future for Generations of Farmers and Consumers Alike Great Lakes EXPO sessions to look at how to effectively plan greenhouse, farm succession and the benefits of Farm to School. By Madi Jones 16 From the Road From Seed Coatings to Cut Flowers GPN headed to Ball Horticultural Co. in Illinois this summer for an inside look at new construction, variety introductions and industry trends. By Abby McGarry 20 Plant Health Hydroponics Systems & Principles of Plant Nutrition Essential nutrients, function, deficiency and excess of growing plants without soil. By Elsa Sánchez, Robert Berghage, Thomas Ford, Francesco Di Gioia and Nick Flax 6 SEPTEMBER 2022 GPNMAG.COM 34 28 Culture Report Delphinium Delgenius Series Breeding improvements bred this pot-filling series with multiple semi-double blooms with rebloom. By April Herring-Murray COLUMNS 12 4 Editor's Report 8 Industry News 32 Editors' Picks 41 Classifieds/Ad Index Perspectives Engaging Plant Purchasers Through Online and In-Person Communications By Alicia L. Rihn 34 Vaughn's View Creative & Colorful Container Recipes By Vaughn Fletcher 42 Technically Speaking Pros and Cons of Cool Nights By Erik Runkle Miss our August issue? It's now available to view on gpnmag.comhttp://www.gpnmag.com http://www.GPNMAG.COM