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Harvest, Storage & Post-Harvest TimingHarvest Calendar for Field Crops
Field crop harvest runs on crop maturity, moisture and machine capacity, and a good calendar accounts for all three.
Key points
- Use NASS usual dates and Crop Progress reports as a regional reference, not a prediction.
- Plan fields by maturity, moisture, risk and hauling capacity.
- Compare machine capacity with how many acres mature at once.
- Keep field-by-field records to build your own normal harvest window.
Where can you find typical harvest windows for field crops?
USDA NASS publishes Usual Planting and Harvesting Dates for U.S. field crops, which lists typical start, most active and end windows by state. It is a statistical summary of past reports, so it describes what usually happens, not what will happen this year.
Pair it with the weekly NASS Crop Progress reports during the season to see how your state compares with its own average. If your state is running ahead or behind, adjust your plan accordingly.
What drives the real harvest date?
Three things set the date on your farm. First is crop maturity, which depends on planting date, hybrid or variety maturity and the heat accumulated since planting. Second is moisture: grain and seed usually need to dry in the field to a level that suits your harvest and storage plan. Third is weather, because a wet fall can hold combines out of the field for days.
Write each field's planting date and the maturity rating of what you planted. Fields planted early with earlier-maturing varieties will usually be ready first, so a planting plan that spreads maturities also spreads the harvest.
How should you order your fields?
Harvest order is a decision about risk. Fields with weak stalks, disease pressure or lodging risk may deserve priority. Fields that dry quickly can wait. Fields with a long haul to the bin or elevator need to fit around hauling capacity.
For example, if one field has lodged corn and another stands well, the lodged one often gets moved up the list even if its moisture is a bit higher. Ask your crop adviser or extension agronomist how to weigh drying cost against field losses in your situation.
How do you account for equipment and labor?
A calendar that ignores machine capacity is a wish list. Estimate acres per day for the combine or harvester, add time for moving between fields and unloading, and compare that with the number of fields that will reach maturity in the same week.
If the numbers do not fit, options include staggering maturities in future years, hiring custom harvest help, or arranging storage so you can pace the work. Decisions on drying and storage should follow the guidance of your extension office and your buyer.
What should you check before the first pass?
Walk the field. Look at stalk strength, kernel or seed condition, and green stem or weed pressure. Test moisture in several spots, because the edges and low areas often differ from the middle.
Check equipment settings against the manufacturer's manual and your extension recommendations, and confirm your crop insurance and record-keeping needs. USDA RMA and your insurance agent can explain reporting requirements for your policy.
Can an example show how the pieces fit together?
Imagine a farm with corn and soybeans, where the corn was planted over a span of about ten days and the soybeans over about a week. The corn will likely mature in the order it was planted, but hybrid maturity ratings can reorder things, so a full-season hybrid planted early might finish after a shorter-season hybrid planted later.
Write the planting date and hybrid or variety next to each field, then estimate the order of maturity. Now compare that order with your harvest capacity. If four fields mature in the same week and you can cover two, you know before harvest that you need a plan, such as custom help or a different hybrid mix next year. Treat the example as a method, and fill it in with your own fields.
What about crops other than corn and soybeans?
Small grains, cotton, sorghum, sunflowers, peanuts and rice each have their own maturity signs, moisture targets and timing. The NASS publication covers many of them by state, and your extension service has crop-specific guides. Use those instead of rules of thumb from a different crop or region.
If you are new to a crop, talk to an experienced neighbor, your elevator or buyer, and a certified crop adviser before you commit. Harvest timing mistakes tend to be expensive and hard to undo.
Sources and further reading
Last reviewed: November 2026. Educational information, ranges only. Confirm timing with your county extension office.