The study aimed to find the best times to plant Guidan589 to achieve high yields. By testing different planting dates in spring and autumn, the researchers discovered that planting between Feb. 15th and Mar. 15th in spring and Jul. 20th to Aug. 15th in autumn led to the highest yields and better plant characteristics. Spring planting after Mar. shortened the growth period and reduced yields, while autumn planting after Sept. led to difficulties in plant maturity due to low temperatures. Planting too early in spring could also affect seedlings due to low temperatures. The optimal planting dates can help avoid natural disasters and increase crop yields.