Saiya
From Dragon Ball Encyclopedia
Planet Saiya (サイヤ 惑星, Saiya Wakusei) is the original homeworld of the Saiyans.
History
Planet Saiya was destroyed at some point in time at the hands of an out of control Super Saiyan. The refugee Saiyans eventually settled on Planet Plantwere they lived peacfully with the tuffles till 720 .