Four-season plum, also known as Sun Ri Chun, Catharanthus roseus, Yan Lai Hong, blooming every day, etc. The four seasons do not wither. It is a perennial herb. May in four seasons likes warm, slightly dry and sunny environment, and the suitable growth temperature is18 ~ 24℃ from March to July,13 ~18℃ from September to March, and it can grow every year when the winter temperature is not lower than 10℃.