Exclusives from Urban Ag News Choosing a substrate for hydroponic productionBy David Kuack, UrbanAgNews.comAugust 9, 20170 When selecting a substrate for growing hydroponic leafy greens, lettuces and microgreens, the type of production system should be one… Share this:Click to share on Facebook (Opens in new window)Click to share on LinkedIn (Opens in new window)Click to share on Reddit (Opens in new window)Click to share on Twitter (Opens in new window)Click to share on Tumblr (Opens in new window)