Seller disclosure: XES Netting manufactures bale net wrap. We do not sell cover crop seed, seed mixes, inoculant, stretch film, wrappers, or forage testing, and we earn nothing from any brand or lab named below. We do have a commercial interest in baling and wrapping, so the honest limits of the wrap-it option are stated explicitly in this guide.
Short answer: Graze it if you have fence and water — it is the cheapest option and leaves the most residue. Make dry hay only if the stand is dominated by grasses or small grains. A diverse mix carrying brassicas, sunflowers, or peas will not field-cure reliably, because those species sit at 80–90% moisture in thick, waxy, fleshy tissue; wrapping at 45–55% moisture is the realistic harvest for them. Cut small grains at flag leaf to boot. And if the stand was drought-stressed — especially anything with sorghum or sudangrass in it — test for nitrate before you feed, because drying does not reduce nitrate; only fermentation does, and only partly.
Cover crops get planted for soil, then the calendar turns and a real feed decision appears in the field. The stand is standing there with tonnage on it, the grazing is short or the fence is missing, and the question becomes concrete: graze it, hay it, or wrap it?
We have per-species guides already — cereal rye, triticale, oat-pea, oat hay, sorghum-sudangrass, wheat. Those answer "how do I harvest this one crop." None of them answer the question a mixed-species cover crop actually poses, which is which of three harvest routes this stand can physically support, given that it contains four to eight species that dry at wildly different rates and carry different risks.
This guide covers that decision. It is not about corn residue — our graze vs bale cornstalks guide handles residue, which is a single-species, already-dead, low-quality material with entirely different rules.
The three-way fork
Nearly every cover-crop harvest thread lands on the same three options, in the same priority order. A Montana producer with 240 acres of a sudax, millet, soybean, sunflower, turnip and radish mix laid his out explicitly:
"A- hay. B- leave stand to catch snow for moisture. C- build fence and graze (but have plenty of grazing so don't want to lay out the $ nor time just now)"
— tbeck, AgTalk thread 1170135
Notice what actually decides it: not agronomy, but infrastructure and labor. Grazing is agronomically the best answer almost every time — the animals harvest for free, the residue stays, the manure returns, and there is no machinery cost. It loses on fence, water, and time.
The honest ranking:
- Graze — cheapest, best for soil, requires perimeter fence and water. Temporary poly fence and a tank often beat the cost of a haying pass, so price it before dismissing it.
- Wrap (baleage) — works on almost any stand regardless of species mix or weather, at higher cost per ton. See our first-time baleage guide.
- Dry hay — cheapest to store and easiest to sell, but only physically available on some stands. This is the option most often chosen wrongly.
There is a fourth answer that gets picked more than outsiders expect — leave it standing. In semi-arid country a standing cover crop catches snow, and that stored moisture can be worth more than the forage.
"I would hay the goody and leave the rest to catch snow."
— jfqc, AgTalk thread 1170135
Splitting the field — harvest the heavy areas, leave the thin ones — is frequently the best answer and rarely the one people consider.
Why a diverse mix will not make dry hay
This is the part that gets people, and it is physics rather than management.
Dry hay has to reach roughly 15% moisture (a little lower for small squares, a little higher for large rounds — see baling moisture for net-wrapped bales). Every species in the stand has to get there. The wettest species in the mix sets your baling date, not the average.
And the wettest species are usually the ones planted for soil benefit:
- Brassicas — turnip, radish, rape. Fleshy leaves and bulbs, commonly 80–90% moisture at forage stage, with a waxy cuticle that actively resists water loss. They are bred to be succulent.
- Sunflower. Thick pithy stems that hold water long after the leaves are crisp.
- Peas and soybeans. Succulent stems that stay tough well after the grass fraction is dry.
Put those alongside millet or a small grain and you get the classic failure: the grass fraction is dry enough to shatter while the brassica leaves and sunflower stems are still green and wet. Bale that and you have baled hay with wet pockets in it. Wet pockets mold, and in a large dense bale they heat — see hay bale heating and fire prevention and is moldy hay safe to feed.
Wrapping solves this directly, because baleage targets 45–55% moisture instead of 15%. You are no longer waiting on the wettest species to give up its last drop; you only need a uniform wilt. Two to eight hours of good wilting often does what three dry days could not.
The practical rule: count the wet-species fraction. If brassicas, sunflowers, and legumes are more than roughly a quarter of the stand by volume, dry hay is a poor bet and wrapping (or grazing) is the realistic route. If the stand is overwhelmingly small grains and grasses, dry hay is back on the table.
Timing: the window is narrower than you think
For the small-grain fraction — rye, wheat, triticale, barley, oats — the target is flag leaf to boot stage: the last leaf fully emerged, the head swelling in the sheath but not yet out. Cut there and you get most of the tonnage with protein and digestibility still high. Let the head emerge and fiber climbs fast while quality falls off a cliff.
"We plant annual ryegrass blended with winter wheat that we plant in the fall…. Cut at flag leaf and bale as silage in the spring for dairy feed…..awesome dairy quality and tonnage is pretty great too."
— CanadianCowMan, AgTalk thread 1146102
The complication specific to mixes is that the species do not mature together. A warm-season mix hits its brassica peak, its millet boot stage, and its sunflower bloom at different times, so there is no moment when every component is at its own optimum. You are choosing which species to optimize for and accepting compromise on the rest — usually correct to optimize for whichever species carries the most tonnage.
In arid country the compression runs the other way, with everything ready at once and no labor to cover it:
"The trouble with mixed grass hay in arid NE Montana- it's all ready at the same time."
— tbeck, AgTalk thread 1170135
And the most common failure mode is simply waiting too long while deciding:
"Looks to me like the time to mow it was yesterday."
— Haleiwa, AgTalk thread 1170135
A stressed or stalled cover crop does not improve by being deliberated over. If it has quit growing, its quality is already declining.
Fall-planted covers add a second constraint: the following crop. Producers running rye or triticale ahead of corn are harvesting against a planting deadline, not a quality optimum.
"All of our early harvested corn either for silage or grain gets planted in a rye/crimson clover cover crop. We then bale all of it as baleage, spread manure and plant corn/soybeans back into it. It's always a rush to get all of it done fast enough to get crop planted back in but it's worked well for us. It makes great feed."
— StewartMD, AgTalk thread 1146102
That rush is exactly why wrapping wins in the double-crop system: baleage removes the multi-day drying dependency that dry hay would impose on an already tight window.
The safety gate: nitrate
This section is a gate, not a footnote. Skip it and you can poison cattle with feed that looks fine.
Drought-stressed or heavily fertilized annuals accumulate nitrate, concentrated in the lower stem. The species most prone are exactly the ones in summer cover crop mixes: sorghum, sudangrass, sorghum-sudan hybrids, millets, oats, and brassicas.
The rule that surprises people, per SDSU Extension and K-State Extension:
- Making dry hay does not reduce nitrate. Nitrate is stable; it is still there in the bale. A hay crop that was dangerous standing is dangerous baled.
- Ensiling reduces nitrate roughly 40–60% through fermentation — a real advantage for the wrap-it option — but it does not eliminate it, and wrapped feed still must be tested before feeding.
- Cutting higher helps. Leaving 6–12 inches of stubble leaves the highest-nitrate tissue in the field.
Commonly cited interpretation ranges on a dry-matter basis, as nitrate (NO3): under about 5,000 ppm generally safe; 5,000–10,000 ppm potentially toxic as a sole feed, with pregnant, young, and stressed animals most at risk; above 10,000 ppm dangerous. Reports differ on whether they express results as nitrate or nitrate-nitrogen, and the two differ by roughly 4.4× — confirm which basis your lab used before acting on a number, and have results interpreted by your extension forage specialist or veterinarian.
Our prussic acid and nitrates in baled forage guide and the sorghum-sudangrass baleage guide cover sampling and the separate prussic-acid hazard in full. If your mix contains any sorghum species and the season was dry, read those before harvesting.
What you give up by removing it
A cover crop harvested for feed is a cover crop that is no longer covering. That trade deserves to be stated plainly rather than hand-waved, and producers do state it plainly — haying takes the residue that was the point of planting, and next spring you still have to seed through whatever is left.
The considerations that actually change the call:
- Erosion exposure. Sloped or wind-exposed ground bare over winter is a real cost, not a theoretical one.
- Snow catch. In semi-arid regions standing residue traps snow, and that moisture may be worth more than the hay.
- Root mass stays either way. Grazing and haying remove top growth; the root system and its soil benefit remain. This is the strongest argument that harvesting is not a total forfeit.
- Grazing splits the difference. Animals leave 30–50% of the growth plus manure. If soil health was the goal and you still want feed, grazing is the compromise.
- Program rules. If the cover crop was planted under a cost-share or insurance provision, harvest restrictions may apply. Check before you cut, not after.
What producers actually get
Reported yields vary enormously with rainfall, fertility, and species. On irrigated or heavily manured ground with a fall-planted small grain:
"We get easily 8-9 bales 4x4 (16-1700lbs) per acre…. Extremely good you are able to get 10+."
— CanadianCowMan, AgTalk thread 1146102
That is roughly 6–7 tons of wet baleage per acre — an excellent, heavily-managed result on tight acres with lots of manure and fertilizer, not a planning number for a dryland summer mix. A drought-stressed dryland cover crop may yield under a ton of dry matter per acre, which is exactly why the "is it even worth the machinery pass" question comes up so often. Frequently the answer is still yes:
"Doesn't look to bad to me I would hay it. Have hayed a lot worse."
— buckmaster, AgTalk thread 1170135
On feed value, one observation recurs often enough to plan around:
"Rye, and I'm assuming other small grain silage, feeds hotter than it tests."
— Crete, AgTalk thread 1146102
Producers consistently report small-grain silage performing better than its lab numbers suggest — plausibly because highly digestible fiber ferments faster than a standard NDF value captures. Treat it as a reason not to discount the feed, not as a reason to skip testing.
The decision table
| Your situation | Best route |
|---|---|
| Fence and water available, cattle nearby | Graze. Cheapest, keeps residue and returns manure. |
| Mix is >25% brassica / sunflower / peas | Wrap or graze. Dry hay will not cure evenly. |
| Nearly all small grains or grasses, clear forecast | Dry hay is viable. Cut at flag leaf to boot. |
| Fall cover ahead of spring planting | Wrap. Removes the multi-day drying dependency. |
| Drought-stressed, sorghum species present | Test nitrate first. Then favor wrapping; cut high. |
| Semi-arid, thin stand, moisture-limited | Consider leaving it to catch snow, or split the field. |
| Erodible ground, winter exposure | Graze lightly or leave. Do not strip it bare. |
| Stand has stalled and quit growing | Decide now. Quality is already falling. |
Where net wrap and film fit
We manufacture net wrap, so here is the plain version, including where our product is not the answer.
A wrapped bale needs both materials, and they do different jobs. Net wrap holds the bale dense and round. Stretch film provides the oxygen barrier that makes fermentation work. Film is not optional and net wrap does not replace it — a net-wrapped bale left unwrapped in film will spoil, not ferment. Our net wrap under plastic film guide covers the division of labor.
Why net wrap earns its place under film on a cover crop specifically:
- Coarse, mixed stems need containment. Sunflower and sorghum stalks push back hard against a bale. A firm net-wrapped bale keeps its shape so film seals against a smooth surface instead of bridging over springing stems.
- Fewer punctures. Stems that stick out of a loose bale are what perforate film. Containing them protects the seal that the whole fermentation depends on.
- Speed in a tight window. Cover crop harvest is usually run against a planting deadline or a weather window. Net wrap closes a bale in two or three turns versus twenty-plus for twine — see net wrap vs twine.
Where we are not the answer: if you graze it, you need no wrap at all, and grazing is often the better decision. We would rather say that than sell wrap into a job that fence and a water tank would do better.
The bottom line
Match the harvest route to what is actually growing out there. Grazing wins on cost and soil whenever fence and water exist. Dry hay is only physically available when the stand is dominated by grasses and small grains — a mix carrying brassicas, sunflowers, or peas will not cure evenly and will bale wet pockets into your stack. Wrapping works on nearly any stand at nearly any moisture, costs more per ton, and has the underrated advantage of cutting nitrate through fermentation in a way that drying simply does not.
Cut small grains at flag leaf to boot. Test drought-stressed stands before feeding. Leave the thin ground standing if snow catch is worth more than the tonnage. And decide sooner than feels comfortable, because a stalled cover crop is losing quality while the decision is being made.
Frequently asked questions
Can you make dry hay from a cover crop mix?
Only if the stand is dominated by grasses or small grains. Mixes containing brassicas, sunflowers, or peas will not field-cure evenly, because those species hold 80 to 90 percent moisture in thick waxy tissue while the grass fraction dries and shatters. Bale that and wet pockets mold and heat.
When should you cut a small grain cover crop for baleage?
Cut at flag leaf to boot stage, when the last leaf is fully emerged and the head is swelling in the sheath but not yet out. This captures most of the tonnage while protein and digestibility are still high. Once heads emerge, fiber climbs quickly and feed quality drops sharply.
Does making hay reduce nitrate in a drought-stressed cover crop?
No. Nitrate is stable and remains in the plant after drying, so hay from a high-nitrate stand is still dangerous. Ensiling reduces nitrate roughly 40 to 60 percent through fermentation, which favors wrapping, but wrapped forage must still be tested before feeding.
Is it better to graze or bale a cover crop?
Grazing is usually better when fence and water are available. It costs the least, returns manure, and leaves 30 to 50 percent of the growth as residue. Baling makes sense when infrastructure is missing, the acreage is remote, or you need stored feed rather than standing feed.
How much forage does a cover crop yield?
It varies enormously. Fall-planted small grains on heavily fertilized or irrigated ground have been reported at 8 to 9 round bales of about 1,600 to 1,700 pounds per acre. A drought-stressed dryland summer mix may yield under a ton of dry matter per acre, which is why the machinery pass is sometimes questionable.
Written by the XES Netting team. We manufacture bale net wrap and read the farmer forums so the people doing the work can find clear, source-cited answers faster. Every quote in this post is verbatim with a source link — go read the originals.
Hero image: Cover crop or green manure, by Jonathan Billinger on Wikimedia Commons, used under CC BY-SA 2.0.
