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Field Crops, Grains & OilseedsHay Planting Calendar by Region
Hay is a broad category. A cool-season grass hay field in the North and a warm-season field in the South follow very different calendars.
Key points
- Hay species and region decide the seeding calendar.
- NASS lists harvest dates for other hay, not seeding dates.
- Cool-season grasses are seeded spring or late summer; warm-season grasses after soil warms.
- Use soil tests and local rules for lime and fertilizer.
What does hay planting depend on?
Hay can come from cool-season grasses such as timothy, orchardgrass and fescue, from warm-season grasses such as bermudagrass, and from legumes such as alfalfa and clover. Each group has its own best seeding time. Cool-season species are generally seeded in early spring or late summer, while warm-season species are seeded or sprigged after the soil warms in spring.
The best first step is to name your species and use your state's extension guide for it. Do not borrow dates from a different region, because a late-summer seeding date for one state could be too late in another.
How do regions differ in hay timing?
USDA NASS lists the usual start of other hay harvest in the October 2010 edition as about April 20 in Oklahoma, about May 1 in Texas, about May 15 in Kentucky, about May 17 in Missouri, about June 5 in Iowa and about June 19 in North Dakota. Southern states start earlier and may harvest several cuttings, while northern states start later and fit fewer.
The NASS table covers harvest only, with no usual seeding dates for hay. Use it to understand how long your season is likely to be, then consult local extension for seeding guidance.
- Southern hay seasons start in April
- Northern seasons start in June
- NASS lists harvest, not seeding
What are the usual seeding windows by type?
For cool-season grass in the North, late summer seeding is often preferred because weed pressure drops and soil is still warm enough for germination, but the seedlings need time to establish before winter. Early spring seeding also works if you can manage weeds. For warm-season grass in the South, seeding or sprigging happens after the soil has warmed and the frost risk has passed.
Frost-seeding of legumes into existing pasture or hay is practiced in some regions, using freeze and thaw cycles to work seed into the ground. Ask extension whether it fits your area.
How do you choose species for your region?
Start with your climate, soil and use. Hay for horses has different needs than hay for beef cattle or dairy. Soil drainage and fertility also narrow the field. Extension forage specialists publish species and variety guides that match options to regions and soils.
Consider mixtures. A grass and legume mix can balance yield and quality, but management of mixtures is more complex. Ask local specialists what works in your county.
How does fertility and lime planning work?
A soil test is the foundation for hay fertility. Extension recommendations give lime and nutrient guidance based on test results and your yield goals. Nutrient management rules vary by state and some restrict timing or placement, so check local requirements. Do not guess at rates.
Manure can supply nutrients but should be tested and applied according to local rules. Hay removes nutrients over time, so plan for replacement.
What mistakes should you avoid?
Seeding too late in the fall, seeding too deep, skipping the soil test and picking a species that does not fit your drainage are among the common ones. Cutting too early or too late for the species is another. Keep records of seeding dates, species, cutting dates and weather.
Any herbicide or pesticide use follows the label and state licensing rules. Protect pollinators when legumes bloom.
- Seeding too late in fall
- Skipping a soil test
- Choosing species that do not match drainage
How can you build a regional plan from your own records?
Start with a simple table for each field. List the species, the seeding date, the first and last cutting dates, the weather and the yield, whether in bales or tons. After two or three seasons the table shows how long your season really is, which fields come on early and how often rain disrupts the schedule.
Compare your own dates with the NASS harvest windows for your state. If your first cutting runs a couple of weeks earlier or later than the state pattern, think about why. Soil, elevation, slope and species all play a part, and your extension agent can help interpret what you see.
Use the table when you plan new seedings. A field that is slow to dry may be better suited to a species that tolerates wet feet, while a hot, dry hillside may fit a different one. Over time, the farm teaches you what the statewide tables cannot.
Timing at a glance
| Item | Window | Caveat |
|---|---|---|
| Other hay harvest start, Oklahoma | Usual harvest begins about April 20 and ends about October 20 | Usual dates describe typical field activity in that state, not a safe date for your farm. Check your own last frost date, soil temperature and your state extension guide. |
| Other hay harvest start, Kentucky | Usual harvest begins about May 15, with most activity from about June 1 to September 1 | Usual dates describe typical field activity in that state, not a safe date for your farm. Check your own last frost date, soil temperature and your state extension guide. |
| Other hay harvest start, Iowa | Usual harvest begins about June 5, with most activity from about June 14 to August 17 | Usual dates describe typical field activity in that state, not a safe date for your farm. Check your own last frost date, soil temperature and your state extension guide. |
| Other hay harvest start, North Dakota | Usual harvest begins about June 19 and ends about September 2 | Usual dates describe typical field activity in that state, not a safe date for your farm. Check your own last frost date, soil temperature and your state extension guide. |
Sources and further reading
Last reviewed: November 2026. Educational information, ranges only. Confirm timing with your county extension office.