Quick answer: Square bales can be wrapped, and big squares are wrapped commercially every day — but a square is harder to seal than a round because film tension concentrates on the corners, and corners are the first thing to tear. Four rules carry most of the outcome: set bale length to fit the wrapper's table before you bale, bale dense and genuinely square (a banana-shaped bale will not stay on a turntable), bale in the 45–60% moisture window, and run at least six layers of film on the sides. Small squares are a separate question with a separate answer: the machines exist, but the economics are dominated by hand labor, because a 50 lb dry bale becomes a 60 lb wet bale that somebody lifts twice.
Almost everything written about baleage assumes a round bale. That is reasonable — most baleage is round — but it leaves a real group of operators without an answer. If you run a big square baler, own no round baler, and lose a cutting to weather, "make round baleage instead" is not advice. It is a $40,000 equipment purchase.
This guide is about the square-specific part: what changes when the bale has corners, what it costs, and where the idea genuinely falls apart. For the fundamentals that apply to any wrapped bale — fermentation, film chemistry, feed-out — start with our first-time baleage guide and net wrap under plastic film. We will not repeat them here.
Why a square bale is harder to wrap than a round one
On a round bale, stretch film lays onto a continuously curving surface. Tension distributes evenly around the circumference, and there is no point where the film has to change direction abruptly.
A square bale gives you eight corners and twelve edges. As the turntable spins, the film bridges each corner rather than conforming to it, so the tension that was spread across a whole curve now lands on a small area of plastic — repeatedly, once per revolution. Add a stiff alfalfa stem poking out of that corner and you have the classic failure.
An operator who bought a McHale square wrapper in a hurry to save 150 tons of fifth-cutting alfalfa hit it on the first night, and the answer he got named the variable exactly:
"You will find the drier the product you are wrapping the more issues you have trying to get the corners to stay intact, especially alfalfa. Wrap quality will also have a bearing"
— MikeRF · HayTalk thread 18073
That is the whole square-bale problem in one sentence. Drier forage is stiffer and springier, stems stand prouder at the corner, and the bale rebounds against the film instead of settling into it. The corner tears, air gets in, and you find the spoiled block next February.
It is worth being precise about what net wrap does and does not do here, because the two products get conflated. Net wrap works by a mechanism that only exists inside a round baler's chamber — a forum member explained it correctly while thinking through a homemade bundler:
"My understanding of netwrap, is it needs the bale under compression when wrapped, so that when it comes out of the chamber it expands, locking the net in place, helped by the ends of stems sticking out grabbing the net? I know that rounds done too loose will shed netwrap."
— askinner · HayTalk thread 18727
That is right, and it is why net wrap is not a square-bale product. Net holds a round bale because the bale expands into it. A square bale is held by twine and sealed by stretch film — two different jobs, as we lay out in net wrap vs film binding.
Set bale length before you set anything else
This is the step people skip, and it is the one that strands bales half-wrapped in the field. A square-bale wrapper has a fixed table. Your baler does not know that.
"Bale it up, skip the acid (why ruin it with that stuff), and don't skimp on wrap. You should have at least six layers on the sides of the bales. Remember to shorten your bale length down to accommodate your wrapper."
— IAhaymakr · HayTalk thread 18073
He runs about 6.5 feet for his own wrappers. The exact number is machine-specific — check your table length — but the principle is not: shorten the bale before you start, not after you have 400 on the ground.
A New Zealand operator wrapping small squares found the same constraint at the other end of the size range, and added the shape requirement:
"The bale length needs to be spot on to fit into the wrapper properly. Too long or too short and you risk the bale falling out of the wrapper while still being wrapped."
— 128mpr · HayTalk thread 26527
"Bale length needs to be consistent and bales need to be square, not banana shaped."
— 128mpr · HayTalk thread 26527
Bale length also drifts on you when the crop changes. He noted that his baler's length setting behaved differently on green haylage material than on dry hay, so a setting proven last week on dry grass is not proven for the wet crop you are about to run.
One more field-tunable variable worth knowing: turntable speed. He was throwing roughly every fifth bale off the table at 40 RPM, dropped to 30 and the problem largely went away, and could hold even poorly formed bales by going to 25. Slower is slower, but a wrapped bale beats a fast reject.
Moisture: a narrower window than the round-bale rule of thumb
Purdue University Extension's baleage guidance puts the target at roughly 45–60% moisture, wrapped promptly after baling, with a minimum of six layers of film. Square bales sit at the fussier end of that range for the corner reasons above.
What the forum adds is what happens when you land outside the window — in both directions. On the dry side:
"as your moisture drops below 30%, and especially with the temperature this time of the year, it is unlikely that you will have much if any fermentation. This is not a negative, as you will take sweet hay out of the wrap months later that looks exactly like the day you baled it."
— IAhaymakr · HayTalk thread 18073
Read that carefully, because it is a trade, not a free lunch. Below about 30% you are not making silage; you are making sealed dry hay. It can feed beautifully, but it has no fermentation acids protecting it, so the seal is doing all of the work. One corner tear and there is nothing to fall back on. That is the same tension we cover in wrapping dry hay.
And on the machinery side, the moisture you choose constrains the wrapper you can use:
"I tried inline first. It was a disaster for us because the moisture wasn't right...too low I guess. I learned later that inline works best at 55 to 65% moisture."
— IAhaymakr · HayTalk thread 18073
That is a genuinely useful decision rule. Inline tube wrappers want the wet end of the range and they lock you into feeding in tube order. Individual wrapping tolerates drier material and keeps each bale independently sellable and transportable — which matters a great deal if you sell hay rather than feed it. Our bale wrapper buying guide covers that fork in depth for round bales; the same logic transfers.
| Moisture at baling | What you actually get | Square-bale risk |
|---|---|---|
| Below 30% | Sealed dry hay, little or no fermentation | Highest — stiff stems, springy corners, no acid backup |
| 30–45% | Weak, incomplete fermentation | High — the awkward middle; seal integrity is everything |
| 45–60% | Target range for baleage | Manageable with 6+ layers and a dense bale |
| 55–65% | Where inline tube wrappers perform best | Heavy bales; handling and transport get harder |
Six layers is a floor, not a target
Every experienced voice in these threads says the same thing about film quantity, and none of them hedge. The economic argument is the persuasive one:
"Totally agree with everything IAhaymakr has said with emphasis on not skimping on the wrap. This is especially important as moisture levels drop and with forage prices at the levels they are this year that extra couple of rolls of wrap will be a real quick payback."
— MikeRF · HayTalk thread 18073
Film quality is a separate lever from film quantity, and on squares it earns its price faster than it does on rounds, because the corner is a stress concentration that punishes thin or inconsistent film:
"It is definitely a get what you pay for deal. We have found that Supergrass 1.2mil is by far the best, and most expensive, wrap that we use. Even though its over $100 per roll I think it's cheaper in the long run with almost no wrapping problems to deal with."
— IAhaymakr · HayTalk thread 18073
Note the frame: not "the good film makes better bales" but "the good film costs less in the long run." That is the correct way to price a consumable whose failure mode is losing the bale. We make the same argument about net wrap in net wrap roll weight vs quality.
Skip the acid
Preservative habits from dry baling do not transfer. Both experienced responders said so immediately:
"DON'T put acid on it if you will wrap. If anything, put an innoculant on, considering that you are on the lower end of ensiling moisture."
— Gearclash · HayTalk thread 18073
Propionic acid suppresses microbial activity — which is exactly what you want in dry hay and exactly what you do not want when you are trying to start a lactic acid fermentation. If you are reaching for a product, reach for an inoculant instead; see baleage and silage inoculant guide.
Density is the other free variable. A cutter or "silage special" baler with a knife bank makes a denser, better-shaped square that holds its corners and excludes more air, which is why it keeps coming up as the real ticket for this work.
Small squares: the machine works, the labor is the problem
Wrapping 50 lb squares is a genuinely different business from wrapping 3x4s, and it is one of the few forage topics where the internet's enthusiasm and the operators' arithmetic point in opposite directions.
The demand side is real. There is an identifiable customer:
"Wrapped dry bales would sell really well to the horse owners that have to haul the hay home in the back of their SUV"
— Jay in WA · HayTalk thread 26527
And the operator who actually bought a McHale 995LM and ran it defended the niche on positioning grounds, which is the strongest argument in the thread:
"Every man and his dog has big rounds, so if I was selling big rounds I'd be competing against them."
— 128mpr · HayTalk thread 26527
"My customers want to put a wrapped bale into the back of their car or in their horse float without having any handling equipment."
— 128mpr · HayTalk thread 26527
Then he posted his actual numbers, which is the most valuable thing in any of these threads. Wrapping in New Zealand around 2015: roughly 25 bales per roll of 375mm film, film cost near US$2.70 per bale, a work rate of about 25 bales per hour, and a US$6,700 machine. To cover labor, machine and capital at a US$50/hour target, he calculated he needed about US$5 per bale — on jobs that are frequently only 50 to 100 bales.
Convert that to the thing that actually decides it. At 25 bales an hour, one person is lifting a wet bale onto the table and a heavier wrapped bale off it, 25 times an hour, all day:
"Green bales are heavy. Probably 30kg (60 lbs). Plan to hire some fit, strong teenagers to do the hard work or you'll be feeling it later that night."
— 128mpr · HayTalk thread 26527
He was blunt about where that leads: lifting 30 kg all day was going to stop being fun, and he expected to move toward hiring the wrapper out rather than doing the lifting himself.
There is also a machine-side minimum weight, which catches people who assume small wrappers want light bales:
"New learning today is that the bales need to be heavy in order to stay on the wrapper and not fall out."
— 128mpr · HayTalk thread 26527
"that is a typical problem with the mchale 995lm. bales need to be mimimum 25kgs for a more uniform bale and a faster hassle free wrapping. i use the 250mm film .2 rolls on the machine and wrap each bale 18 times."
— imgrand · HayTalk thread 26527
So the bale has to be at least ~55 lb to stay on the table, and at 45–60% moisture it will be heavier than that. There is no version of this where the bales are light.
The skeptics in the thread were making a handling argument, not a technical one, and they were not wrong:
"I sure as heck wouldn't be the one having to handle those heavy wet squares. Seems like it would be way more trouble than its worth to wrap little squares."
— FarmerCline · HayTalk thread 26527
"I just fail to see the advantage over 4x4 rounds wrapped. If its lack of handling equipment they roll easy enough."
— hillside hay · HayTalk thread 26527
The honest resolution: small-square wrapping is a retail play, not a forage-production play. It only makes sense if you are selling single bales to customers without equipment, at a price that reflects hand labor. If you are making winter feed for your own cattle, wrap rounds. If you need to move small squares dry, an accumulator and grapple beat a wrapper every time — see small square bale handling systems.
The recurring DIY idea: net-wrapping a bundle of small squares
This one comes up every few years — compress a stack of small squares like a Bale Baron pack, then wrap the bundle in net instead of paying for knotters. It is a clever thought and worth understanding why it does not hold.
The problem is the mechanism askinner described earlier. Net wrap grips because a round bale expands against it under residual chamber pressure, and because loose stem ends hook the mesh. A hand-squeezed bundle of small squares released from a grapple does not expand into the net; it relaxes away from it. Another member put the doubt plainly:
"I have been dreaming of this very invention. I'm just not convinced that net wrap has the strenght to hold the bundle together."
— cmd · HayTalk thread 18727
Net wrap is engineered for hoop stress on an expanding cylinder, not for axial restraint on a relaxing rectangular stack. If you want to bundle small squares, use strapping or twine, which work in tension and hold what you set. Net wrap's real job is described in net wrap vs twine.
Should you wrap squares at all?
| Your situation | Reasonable answer |
|---|---|
| Big square baler, no round baler, weather took the cutting | Wrap. This is the strongest case for square baleage — it saves a crop you cannot otherwise save, which matters most in a year when you are already short on hay. |
| Selling wrapped forage that must ship | Individual wrapping, not inline. Tube-wrapped bales are hard to sell and transport. |
| Feeding your own cattle, own a round baler | Wrap rounds. Cheaper film per ton, easier handling, no corners. |
| Retail customers with no equipment, premium price | Small-square wrapping can pay — if you price the hand labor honestly. |
| Just want small squares moved and stored dry | Accumulator and grapple. Do not wrap. |
Where net wrap fits in this
Honestly: mostly by pointing out that the round-bale route is cheaper for most of the people asking this question. Net wrap is a round-baler consumable — it does not go on a square bale, and no amount of clever fabrication changes the physics.
But the two products meet in one real place. If your reason for looking at square wrapping is "I cannot reliably get dry hay," then the comparison you actually want is dry hay under good net wrap and proper storage versus wrapped baleage in any shape. Net wrap sheds water and holds bale shape, which is what makes outdoor round-bale storage viable in the first place — and that comparison is often what decides the whole question. We work through it in dry hay vs baleage and net-wrapped bale storage outside.
Frequently asked questions
Can you wrap square bales like round bales?
Yes. Big square bales are wrapped commercially with dedicated square-bale wrappers from McHale, Tanco, Kuhn and others. The difference is that film tension concentrates on the bale's corners rather than spreading around a curve, so corners tear more easily. Plan on at least six layers of film and a dense, true-shaped bale.
How many layers of plastic do square bales need?
Six layers on the sides is the working minimum that experienced operators and Purdue Extension both land on, and going heavier is cheap insurance on squares because the corners are a stress point. Add layers if the forage is drier, stemmier, or being stored past one season. Film quality matters as much as layer count.
What moisture should square baleage be baled at?
Roughly 45–60% moisture, wrapped promptly after baling. Below about 30% you get little or no fermentation — the result is sealed dry hay that depends entirely on an intact seal. Inline tube wrappers specifically want the wetter end, around 55–65%, and perform poorly on drier material.
Why does the plastic tear on the corners of square bales?
Because film bridges a corner instead of conforming to it, so tension that would be spread around a round bale's circumference lands on a small patch of plastic once per revolution. Drier, stiffer forage makes it worse by leaving stem ends standing proud at the corner. Denser, squarer bales and better film reduce it.
Is it worth wrapping small square bales?
Only as a retail product. Machines like the McHale 995LM work, but at roughly 25 bales per hour with 55–65 lb wet bales handled twice by hand, labor dominates the cost. It can pay when you sell single bales to customers without equipment at a premium. For your own winter feed, wrap round bales instead.
Can you use net wrap instead of plastic film on square bales?
No. Net wrap holds a round bale because the bale expands against the mesh under residual chamber pressure and loose stem ends hook the net. A square bale is not under that pressure, and net is porous, so it cannot seal a bale for fermentation. Squares are bound with twine and sealed with stretch film.
The XES Netting team manufactures bale net wrap for round balers and writes these guides so forage operators can find clear, source-cited answers. Every farmer quote in this post comes from a real HayTalk discussion, linked at the quote — go read the threads in full. Moisture targets and the six-layer film minimum come from Purdue University Extension baleage guidance; producer cost figures are the individual operators' own numbers from the years they posted them, and are illustrative rather than current pricing. Confirm specifics for your crop, machine, and region.
Featured photo: Fendt Vario with a McHale 998 square bale wrapper by E. Dronkert, licensed under CC BY 2.0, via Wikimedia Commons.
