CONTENTS THE BUSINESS MAGAZINE FOR COMMERCIAL GROWERS APRIL 2022 | VOLUME 32, NUMBER 4 32 On the Cover The Sun Parasol group of mandevillas is a must-have for this 34 FEATURES 22 Plant Health Holistic Prevention of Plant Diseases A comprehensive approach to plant health is the best way to grow healthy plants. By A.R. Chase 26 Plant Health Small Soldiers Beneficial nematodes are a useful tool in pest management during plant propagation. By Stephen Kloosterman 30 Management Growing Labor Pains - Part 2 Controlled environment agriculture is expanding, and crop consultants will be in high demand. By Carl Silverberg and Kelly Ward 32 Marketing 2022 is the Year of the Salad Greens Salad greens are becoming increasingly popular with consumers. Find out why you should grow salad greens. By Diane Blazek 34 Culture Report Sun Parasol Mandevillas No summer offering is complete without these lush, gorgeous tropicals. By Lorentina McKoy 36 COLUMNS 8 Perspectives Millennials and Houseplants By Melinda Knuth 10 Duets Agriculture's Economics: Are Consumers Always Happiest in Low Price Markets? By Peter Konjoian and Michelle Klieger 36 Vaughn's View Colorful, Exciting & Distinctive Perennials - Part 2 By Vaughn Fletcher 42 Technically Speaking Evaporative Cooling, Part 1: Methods By Erik Runkle Miss our March issue? It's now available to view on gpnmag.com DEPARTMENTS 4 Editor's Report 6 Industry News 41 Classifieds/Ad Index summer season's offerings. Turn to page 34 to learn more about these summer favorites. (Photo: Suntory Flowers) GREENHOUSE PRODUCT NEWS 3http://www.gpnmag.com