Historical Crop Calendar Records

Old planting records, whether from a federal publication or your own notebook, show what usually happens and how far a year can stray from usual.

Key points

Historical records show the spread of possible years, not only the average.
USDA NASS and NOAA publish public records, but check how old they are.
Record planting dates, soil temperature, weather events and missed windows on your own farm.
Avoid reading a trend into a few seasons.
Keep your own records alongside public ones, and label the years behind every figure.

Why do historical records matter?

A planting date chosen from memory tends to favor recent years. Records show the spread: early springs, late springs and the years that went badly. They help you pick dates based on risk instead of habit.

They also reveal gradual change, though a few seasons rarely settle the question.

They also protect you from rosy memory. Most growers remember the good years better than the bad ones, and a written record puts both on the same page.

What federal and public records exist?

USDA NASS has published the Usual Planting and Harvesting Dates series for U.S. field crops and a separate publication for fresh market and processing vegetables, which give typical windows by state. NASS also publishes weekly Crop Progress reports during the season showing how much of each crop has been planted and harvested compared with the previous year and the five-year average.

Check the publication date of anything you use, since practices, varieties and weather have changed.

Be careful with comparisons across decades. Varieties, equipment and practices have changed, so a planting date from an old publication may reflect different seed and different machinery. If you use older publications, note the year of publication next to every date you copy.

NASS Usual Planting and Harvesting Dates for field crops
NASS Usual Planting and Harvesting Dates for vegetables
NASS Crop Progress reports
NOAA climate normals and station histories

How do climate records fit in?

NOAA's NCEI publishes 30-year climate normals, currently 1991 to 2020, and older sets such as 1981 to 2010 remain available. The Midwestern Regional Climate Center freeze date tool goes back to 1950 for counties in the north-central and northeastern states and shows decade-by-decade freeze dates.

Use these to place your own planting records in context. Was a late planting year also a late spring?

Remember that official records and your own records answer different questions: one shows the region over many years and the other shows your fields in the years you actually farmed them.

What should you record on your own farm?

For each field and crop: planting date, variety, soil temperature at planting, stand quality, major weather events, stress periods, harvest dates and yield. Add notes about field conditions that delayed work, and keep a record of dates you wanted to plant but could not.

Those missed windows teach as much as the successful ones.

Photos can help too. A dated picture of each field at the same growth stage each year gives you a quick visual record to go with the numbers.

Planting and harvest dates
Variety and seed lot
Soil temperature and moisture at planting
Weather events and losses
Days lost to wet or cold conditions

How do you read long-term records without fooling yourself?

Look at the range, not only the average. Compare similar situations, such as years with a cold spring. Avoid reading a trend into a short run of years, and note when practices changed, such as a new variety or a drainage project, since those changes can look like climate shifts.

The freeze date tool authors make the same caution: one decade does not establish a long-term pattern. Back up your records every season so a single lost notebook does not erase years of observations.

How do you store records so they last?

Use a simple spreadsheet or CSV file with one row per field and season, plus a notes column. Back it up and use consistent names for fields and crops. Paper notebooks work too, as long as you copy key numbers into a file each winter.

Records are also useful for crop insurance, conservation programs and lender discussions, so check with the USDA Farm Service Agency and your insurance agent about what they require.

How do you use records to improve next year's calendar?

Each winter, sort your records by crop and look at the planting dates that worked best and worst. Check what the weather did in those years, and ask whether the difference came from the date itself or from the conditions around it.

Then change one thing at a time: move a planting date by a few days, try a different variety on a small block, or add a protection step. One change at a time lets you see what actually helped.

When to get local help: Your county extension office or Farm Service Agency office can advise which records are useful for programs and planning on your operation.

Sources and further reading

Last reviewed: November 2026. Educational information, ranges only. Confirm timing with your county extension office.

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