Bocking 14 drives a fleshy black taproot 6 to 10 feet (2–3 meters) into the earth. It bypasses the depleted topsoil to access mineral reserves deep in the subsoil, it collects all the potassium, calcium, and phosphorus. Which are all unavailable to your shallow-rooted vegetables and then pumps that nutrients into their massive, fast-growing leaves. These leaves are essentially a concentrated mineral supplement you can grow in your garden.