How oats are grown and harvested
Oats thrive in cool, wet summers where wheat and corn struggle, and they must be dried below 13% moisture to keep.
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The short version
Oats are an annual grass sown in spring in cooler regions and in autumn in warmer ones. They tolerate poor soil and wet summers better than other cereals. A combine harvests them either directly or after the crop has dried in windrows, because the grain must be at 13% moisture or below to store safely.
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Sow in cool, damp ground
Oats suit regions with cool, wet summers, such as Northwest Europe. They handle low-nutrient soil better than wheat or maize, but sustained cold below −7 °C harms them. In the US Midwest they are sown in spring and in the South in autumn.
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Rotate with other crops
In the Corn Belt oats follow corn, soybeans and forage crops in a rotation. Farmers traditionally grew them with red clover and alfalfa, which fixed nitrogen and fed livestock.
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Combine and dry the grain
A combine cuts the crop directly, or picks up windrows that have dried in the field. Stored grain must not exceed 13% moisture, or it spoils.
13% moisture or below
Worth repeating
- Winter oats can be grazed for a while, then left to head out for grain, or plowed under in spring as green fertilizer.
- Oats are thought to have emerged as a secondary crop, from what was once a weed in fields of wheat and other cereals.
Where it comes from
2024, share of the 22 million tonnes of oats produced worldwide.
Where it goes next
Oats feeds 2 lines directly and reaches 3 things in total.
Further down the line
Keep walking
Sources
Cite this page: "How oats are grown and harvested." Assembly Line, 2026-11-03. https://assemblyline.org/make/oats