The best sowing time for winter wheat (how to determine the appropriate sowing period for wheat)

Don't miss the farming season! It's time to plant wheat again!

It may be because global warming has delayed the date of temperature drop, making the agricultural proverb in the middle and lower reaches of the Yellow River "White Dew comes early, Cold Dew comes late, and it is the right time to plant wheat at the Autumnal Equinox" increasingly inaccurate. It seems that it should be changed to "Cold Dew is the right time to plant wheat."

How should various regions determine the appropriate sowing period for winter wheat?

Cold Dew is the 17th solar term among the 24 solar terms. It usually falls on October 7th to 9th of the Gregorian calendar every year, and mostly on October 8th.

Nowadays, October 1st to 15th every year is the suitable sowing period for wheat in most winter wheat planting areas in my country. So it is basically "the right time to plant wheat in Cold Dew".

What is the optimum temperature for sowing winter wheat?

As we all know, 15℃~20℃ is the most suitable temperature for wheat seeds to germinate and sprout, while 16℃~20℃ is the most suitable temperature range for wheat root growth.

Temperatures that are too low or too high will affect normal germination, especially temperatures below 2°C or above 30°C will seriously inhibit germination and root development.

Of course, different wheat varieties have different temperature requirements for sowing. Generally speaking, the temperature requirements for sowing winter varieties are 16℃~18℃ and 17℃~19℃ at 5cm.

Semi-winter varieties are more suitable for sowing when the temperature is 14℃~16℃ and the 5cm ground temperature is 15℃~17℃. Spring varieties are suitable for sowing when the temperature is 12℃~14℃ and the 5cm ground temperature is 13℃~15℃.

In most winter wheat areas, the suitable sowing temperature for winter wheat is in mid-to-early October each year, so it is more appropriate to sow around the Cold Dew solar term.