Tons of upvotes for a comment that says hydroponic trellises require soil? What's going on here? Hydroponics uses a fraction of the water that soil-based agric

Tons of upvotes for a comment that says hydroponic trellises require soil? What's going on here? Hydroponics uses a fraction of the water that soil-based agriculture uses, and generally uses a very lightweight growing medium. (Vermiculite, hydroton balls, etc...)