Posted by Brian Sparks|May 10, 2016 Join Today For FREE Access to Exclusive Greenhouse Grower Content! You’ll gain access to the Greenhouse Grower Top 100 lists along with exclusive articles, industry reports, and analysis. Join Today Click here if you wish to keep reading other content without joining > Already have an account? Sign in to continue! Forgot Password Brian Sparks is senior editor of Greenhouse Grower and editor of Greenhouse Grower Technology. See all author stories here.