leath The Fieldhouse Microgreen Grow System in Clay: Ready to ship in 2-3 business days. And then you harvest and go again. leath The Fieldhouse Microgreen Grow System in Clay. Includes 6 bundles of soil and seeds: broccoli, arugula, radish, pea shoot, sunflower, and medley 10" x 17" x 10"; 10 lbs.