Winter wheat

[1] Winter wheat is usually planted from September to November (in the Northern Hemisphere) and harvested in the summer or early autumn of the next year.

So-called "facultative" wheat varieties need shorter periods of vernalization time (15–30 days) and temperatures of 3 to 15 °C (37 to 59 °F).

In countries that experience mild winters, such as in South Asia (India, Pakistan, Nepal, Bangladesh), North Africa, the Middle East and the lower latitudes (e.g. Sonora in Mexico), spring wheat (not requiring a period of vernalization) is also sown in the autumn (November–December) and harvested in late spring (April–May) the next year.

[6] Bernhard Warkentin and Mark A. Carleton played a major part in the spread of winter wheat as a commercial crop.

Warkentin organized mills in central Kansas and imported seed from Ukraine to meet growing demand.

Winter wheat production quickly spread throughout the Great Plains, and was, as it still is, usually grown using the techniques of dryland farming.