Quick answer: Millet makes fast, warm-season hay with one big safety edge — unlike sorghum-sudangrass it produces no prussic acid. Pearl millet regrows for two or three cuttings; foxtail (German) and Japanese millet are usually one cut. Cut at boot to early head for the best quality, raise the cutter bar above 4 inches to hold down nitrates, dry the coarse stems hard (a conditioner earns its keep), and net-wrap the bales to protect them.
When you need summer feed in a hurry — a prevent-plant field, a double-crop after wheat, or just a cheap annual to stretch the hay supply — millet is one of the easiest crops to get in the ground. It sprouts fast, shrugs off heat, and cattle, as one grower put it, "really lick it up." But millet trips up first-timers on three things: which millet they actually planted, when to cut it, and the nitrate question. This guide walks all three, pulled from university forage research and growers who have already made the mistakes for you on the HayTalk forums.
The millets that make hay: pearl, foxtail, and Japanese
"Millet" is not one plant — it is a loose group of unrelated warm-season annual grasses, and the type you plant changes everything about how you hay it. Three show up in hayfields, and they behave very differently.
- Pearl millet (Pennisetum glaucum) is the tall one — 4 to 8 feet — and the most productive. It regrows after cutting, so you can take two or three cuttings, and it is the go-to for grazing and hay across the South. Its stems are thick, which matters at drying time.
- Foxtail millet (Setaria italica) — sold as German, Siberian, or hay millet — is shorter and finer-stemmed. It matures in 60 to 70 days, cures more easily, and is essentially a one-cut crop with little regrowth. Its weakness is lodging.
- Japanese millet (Echinochloa esculenta, called Shirohie in Australia) tolerates wet, even briefly flooded ground that would drown other summer annuals, and it can be cut before boot for a second cutting.
(Proso millet is a grain crop and makes coarse, low-quality hay; browntop is a quick cover more than a hay crop. Stick with the three above.) Growers who hit pearl millet right rave about the feed:
"The quality of the hay is fabulous. Nice and leafy, smells great and all. I am happy with the grass."
— Texasmark, on HayTalk
Foxtail millet earns loyalty too, but with a well-known catch that shapes how you handle it:
"German Foxtail millet lodges terribly bad. I really like it but it can be a real pain to deal with as far as wind and storms. You will get considerably more yield out of a S sudan than the G millet. Cattle really lick up the G Foxtail millet."
— Vol (Mike), on HayTalk
| Type | Cuttings | Best for |
|---|---|---|
| Pearl | 2–3 (regrows) | Highest yield, grazing + hay; leave taller stubble |
| Foxtail / German | 1 (little regrowth) | Fine-stemmed quick hay; cure easier but lodges |
| Japanese | 1–2 | Wet or low ground; cut before boot to regrow |
Millet's big safety edge — and the nitrate catch
Here is the reason a lot of growers choose millet over other summer annuals: millets do not produce prussic acid (hydrogen cyanide). Sorghum, sudangrass, and sorghum-sudangrass hybrids all can, especially after frost or drought, which forces you to wait and watch before grazing or green-chopping them. Millet skips that risk entirely (University of Nebraska–Lincoln CropWatch). If you have grown sorghum-sudangrass and sweated the prussic-acid window, millet is a simpler animal.
That said, millet is not risk-free — it trades the prussic-acid problem for a nitrate one. Under drought stress and heavy nitrogen, millet (like most summer annuals) can pile up nitrate in the lower stalk. And here is the part that catches people: unlike prussic acid, nitrate does not gas off as the hay cures. It stays in the bale. You cannot dry your way out of it. A grower who has baled a lot of it put it plainly:
"If present, plant stalks can be cut higher than 4 inches to also help lessen nitrate poisoning. As you probably already know, nitrate poisoning never leaves stored hay."
— Tx Jim, on HayTalk
Four habits keep nitrates in check:
- Raise the cutter bar. Nitrate concentrates in the bottom of the stem, so cutting above 4 inches — higher on drought-stressed fields — leaves the worst of it behind.
- Do not overdo nitrogen. Match N to a realistic yield goal; excess N with no rain to grow it is exactly the recipe for high-nitrate forage.
- Wait a few days after a drought-breaking rain. A stressed crop pulls a nitrate surge when rain finally comes. Growers pass this warning down the line:
"I have also heard that if it rains the night before you cut, to hold off on cutting."
— CowboyRam, on HayTalk
- Test suspect hay before feeding. If the crop was droughty or heavily fertilized, a cheap nitrate test tells you whether to dilute or limit-feed it. Our guide to prussic acid and nitrates in baled forage covers the numbers and the feeding rules.
When to cut millet for hay
Cutting stage is the single biggest quality lever, and it is a straight trade-off between protein and tonnage. Cut early and you get leafy, high-protein hay that dries faster; wait for the heads and you get more bulk but coarse, stemmy hay that is slow to cure. Growers describe the choice the same way every time:
"If you're looking for the highest crude protein then you would cut in the pre to early boot stage. If you're looking for volume, the most hay, then you would wait for the plant to head out."
— qcfarms, on HayTalk
For hay, boot to early head is the sweet spot — enough tonnage without the stemmy, hard-to-dry heads. Cutting stage also decides your regrowth. With pearl and Japanese millet, cut before or at boot and leave stubble, and the crop regrows for a second (and sometimes third) cutting. Foxtail/German millet is largely one-and-done. One grower's pearl-millet field bounced back fast even cut short:
"I had detectible regrowth the day after I cut, and yesterday afternoon it was already 3 inches average above the cut stem. This is great news, meaning I can cut this stuff before the bad stems develop and still get at least a second cutting."
— Texasmark, on HayTalk
The practical rule reconciles regrowth with the nitrate note above: err toward the higher side of the cutter-bar range. Leaving 4 to 8 inches of stubble on pearl millet both feeds the regrowth and leaves the highest-nitrate stem bases in the field.
Drying millet: coarse stems, mold, and dust
Millet's thick stems are the reason it has a reputation for being slow to cure. The leaves feel dry long before the stems do, and a bale that felt ready can heat and mold from the moisture still locked in those stalks — a problem that gets far worse once the plant has headed:
"Only type of Millet that I've baled is Pearl. I cut it after it had headed and it took forever to dry enough not to mold. I think if heads are still inside stalks it will take a long time to dry enough to not mold after baling."
— Tx Jim, on HayTalk
Three moves speed the cure: run a mower-conditioner or crimper to crack the stems, lay it in a wide windrow, and ted or rake to keep air moving through it. First-time pearl-millet growers reach the same conclusion in the field:
"Looks like the guys that said you really need a crimper/conditioner for this are right on!"
— Texasmark, on HayTalk
One clever trick for Japanese millet is to plant it with a light rate of oats: the oats mature into dry straw that wicks moisture out of the wetter millet, giving a cleaner, less dusty bale.
"I plant my Japanese Millet with oats, maybe 1 bushel to the acre. The oats mature early and essentially dry out to straw. I have found that the dry oats will draw any moisture out of the millet and leave a rather dust free palatable millet hay."
— longmeadow farm, on HayTalk
Whatever you plant, do not trust the leaf — check the stems with a probe. See how to make dry hay faster and our hay moisture tester guide for the tools that keep coarse hay from fooling you.
Baling and net-wrapping millet hay
Bale millet like any dry grass hay: aim for roughly 15 to 18 percent moisture in round bales and confirm it with a probe, because those thick stems dry unevenly. Our baling-moisture guide covers the targets and the heating risk if you go in wet.
If the weather will not give you a clean cure — and coarse, headed millet is exactly the crop that fights you — consider baleage instead. Baling at higher moisture and wrapping in plastic lets you harvest at better quality and sidestep the mold risk of forcing dry stems. Start with our first-time baleage guide. One caution: fermentation lowers nitrate only modestly, so still test any drought-stressed crop before you feed it, wet or dry.
Either way, protect the crop. A millet round bale is coarse, leafy, and often heavy, and it needs to hold its shape through storage and handling. Full edge-to-edge bale net wrap keeps the bale tight, sheds rain, and cuts the weathered, spoiled outer layer that twine leaves behind — which matters most for anything stored outdoors (see storing net-wrapped bales outside). If you want a finer-stemmed summer annual that dries easier and sells into the horse market, compare millet with teff grass hay.
Millet hay, start to finish
- Know your millet. Pearl regrows for multiple cuttings; foxtail/German and Japanese are usually one cut.
- Bank the safety edge. Millet makes no prussic acid — no cyanide window like sorghum-sudangrass.
- Manage nitrates. Cut above 4 inches, don't over-fertilize, wait after a drought-breaking rain, and test suspect hay.
- Cut at boot to early head for the best balance of protein and tonnage.
- Beat the slow cure. Condition the stems, use wide windrows, ted, and check stems — not leaves — with a probe.
- Bale dry (15–18%) or make baleage if the weather won't cooperate.
- Net-wrap the bales to hold shape and shed water through storage.
Frequently asked questions
Does millet contain prussic acid?
No. Pearl, foxtail (German), and Japanese millet do not produce prussic acid (cyanide), which is millet's main safety advantage over sorghum, sudangrass, and sorghum-sudangrass. There is no post-frost or post-drought cyanide waiting period. Millet can, however, accumulate nitrate under drought and heavy nitrogen.
When should you cut millet for hay?
Cut at boot to early head stage. Cutting earlier, in pre to early boot, gives the highest protein and faster drying; waiting until it heads out gives more tonnage but coarse, stemmy hay that is slow to cure and prone to mold. Boot to early head balances quality and yield.
How do you avoid nitrates in millet hay?
Raise the cutter bar above 4 inches so you leave the high-nitrate stem base in the field, avoid over-applying nitrogen, and wait a few days to cut after a drought-breaking rain. Nitrate does not break down in stored hay, so test drought-stressed crops before feeding and dilute if needed.
Is pearl or foxtail (German) millet better for hay?
Pearl millet yields more and regrows for two or three cuttings, making it the better choice for total tonnage and grazing-plus-hay. Foxtail or German millet is finer-stemmed and cures more easily but is essentially one cut and lodges badly. Pick pearl for volume, foxtail for a quick single crop.
Why is millet hay so hard to dry?
Millet, especially pearl, has thick stems that hold moisture long after the leaves feel dry, so bales can heat and mold from moisture trapped in the stalks. Use a mower-conditioner to crack the stems, lay wide windrows, ted, and confirm dryness with a moisture probe rather than by feel.
Related guides
Sources: University of Nebraska–Lincoln CropWatch, summer annual forages and nitrate management (accessed July 21, 2026); Penn State Extension and University of Kentucky forage guides on pearl and foxtail millet (accessed July 21, 2026). Grower quotes from HayTalk.com discussion threads, linked above.
Hero image: pearl millet (Pennisetum glaucum) by Shanmugamp7, licensed CC BY-SA 3.0, via Wikimedia Commons.
