Yun Rui 1 19, when was the corn planted?

Yun Rui 1 19, corn seeds were sown in May. The extremely early-maturing spring corn area in the north includes the fourth accumulated temperature zone in the northern and southeastern mountainous areas of Heilongjiang Province. The planting time of Hulunbeier City in Inner Mongolia and Dongba City in northern Hebei Province and some areas in Datong City, Shuozhou City, Xinzhou City and Lvliang City in northern Shanxi Province is generally from the end of April to the beginning of May. Middle-maturing spring corn areas in East China and North China and middle-late maturing spring corn areas in East China and North China, including the first accumulated temperature zone in Heilongjiang; Yanbian Prefecture, baishan city and Tonghua City, Jilin Province; Wulanhaote City, Chifeng City, Tongliao City in Inner Mongolia and Xinzhou City, Jinzhong City, Taiyuan City, Yangquan City, Changzhi City, Jincheng City and other parts of Shanxi Province, the planting time is between April 20th and May 5th. Therefore, Yun Rui 1 19 maize seed was planted in May.