Green onions can be grown all year, and the planted area in Sanhsing can reach 250 hectares, making up 70 % of Ilan's total onion fields, and providing the main cash crop for Sanhsing.
青蔥全年皆可種植，三星產地面積高達二百五十公頃，佔整個宜蘭蔥田總面積的七成，是三星主要的經濟作物。