Rye is the hardiest of the major cereals. It grows where wheat and barley fail, tolerating cold, drought, and poor, sandy soils. The plant, Secale cereale, likely originated as a weed in wheat fields in southwestern Asia before farmers recognised its value.

Russia, Poland, Germany, and Belarus are the largest producers. Rye bread, dark and dense, is a staple in Northern and Eastern Europe. In the US, most rye goes to livestock feed, cover crops, and whiskey production. Rye is also used for thatching, paper, and erosion control.

Why growers plant it

• Survives winters that kill wheat
• Grows well on acidic, sandy, or low-fertility soil
• Excellent cover crop, with rapid autumn growth and deep roots
• Allelopathic: suppresses some weeds naturally

Cereal rye is the most common cover crop in North America. It germinates in cool weather, holds soil through winter, and produces a lot of biomass by spring. Terminated early, it leaves a thick mulch that no-till growers plant directly into. Terminated late, it can become a weed itself.