There are more than 500 cultivated varieties of olive trees around the world.The flowering period is from April to May, and the fruit ripening period is from October to December.It is a light-loving tree species with certain cold tolerance; it is native to the Mediterranean coastal areas of southern Europe.It has been widely introduced in my country and planted in 15 provinces and regions from the south of the Yangtze River Basin to Guangdong and Guangxi, with the largest number in Hubei, Sichuan, Yunnan, Guizhou and Shaanxi provinces.