No tilth. Soil is multi-layered, packed with critical microbes and relies on the subsoil to keep the topsoil balanced. You can’t just grow grass in a tray with the necessary nutrients, just as we can’t just live off of protein pills and vitamin supplements. You see this all the time in new housing developments; they lay down a bunch of porous garbage for fill (old cinder blocks, bricks, busted up concrete) and then lay sod over it. It dies soon after the owners close and then you see them install expensive irrigation systems to overwater it because the soil has no ability to retain moisture or resupply nutrients once the sod is depleted. Planting grass in a tray only works for juicing.
5 Likes
