Corn must grow for a certain number of days before it matures. Ultra-early-maturing maize varieties can mature in 70 ~ 80 days, and ultra-late-maturing maize varieties 13 1 day ~ 140 days can complete their growth cycle. In order to increase the yield of spring corn, sometimes we simply don't plant the last spring corn, that is, let it be empty for one season. At the end of winter, deep ploughing turned out deep soil. Maize seedling stage refers to a period of time from sowing to jointing, which is a vegetative growth stage with rooting and stem-leaf differentiation. The growth characteristics of this stage are: the root system develops rapidly, but the shoot and leaves grow slowly. The growing period of corn can also be quite long. Local farm varieties in Mexico, some corn can grow to more than 4 meters high, and the growing period is more than 200 days. The corn kernels are as big as thumb nails, and the weight of 100 kernels exceeds100g.

The sowing date of maize is affected by temperature and humidity. The best sowing date of spring sowing corn is 7.6cm, and the upper layer is 65438 05℃. The summer sowing corn in North China should be sown in time after wheat or peas are harvested. Sowing depth, according to the soil water content of 2.5- 10 cm, is an early-maturing type, with 70- 100 days in spring and 70-85 days in summer; Spring sowing 120 ~ 150 days or more and summer sowing for 96 days or more are late-maturing types; The varieties in between are medium-mature varieties.

According to different regions and planting time, the corn that tastes more fragrant is fruit corn and sweet waxy corn. The north will mature from mid-July to August. Most of the spring corn in this season is still in the mature stage. Sweet corn: Fresh corn popular in recent two years can be eaten raw. Fresh corn can also be squeezed with corn juice. The geese think it's delicious. Some sweet corn was planted this year. After cooking, the granules are full and the juice is rich. It is safe to import into Explosicum. At present, it is a local brand corn, and it is guaranteed not to be genetically modified. Like pioneer series, it is a genetically modified brand. These products have high yield, but they are not suitable for eating.