Growth & Development
Wheat, triticale, barley, and oat are classified as having either a spring or a winter growth habit. Plants with a winter habit require a period of chilling, or vernalization,
to induce the formation of reproductive structures. Without proper vernalization, win- ter-habit plants either fail to head or head much later than normal. Plants with a spring habit do not require vernalization. Most California production consists of fall-sown spring-habit small grain crops. However, since market classifications sometime refer to the season of production, not growth habit, California’s production is often referred to as winter-type cereals (e.g., hard red winter wheat). True winter wheat and winter barley are produced on limited acreage in the intermountain area of north-central and north- eastern California.