How can plants like Scallions be regenerated and regrown indefinitely in just water without any of the minerals that would be present in soil?

Question

People have shown that you can regrow bulbs of scallions by submerging partially in water. I am aware plants only need sunlight, CO2, and water to produce energy, but I was also impression plants needed trace amounts of nitrogen and some minerals and metals to grow as well. Would scallions grown in just water be able to grow forever without any minerals? And by that logic wouldn’t these scallions also contain no minerals when eaten?

In: Biology

Answer 1

They cannot. There’s only so much a scallion can muster to keep its metabolism if not provided with sufficient K/P/N;