Basil and Swiss chard produced larger harvests because of the addition of waste sheep’s wool in a greenhouse experiment that was conducted by researchers in Mississippi. The plants were grown in potting mixtures that contained uncomposted wool waste, and total basil yields reached five times the control, and Swiss chard yields reached the same level across multiple harvests. Researchers Valtcho D. Zheljazkov and colleagues tested four amounts of wool in eight-inch pots, compared the results with plants grown without it, and assessed whether discarded wool could serve as a source of nutrients and a component of growing media.
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