If you're shopping for a round baler and you think you might make some baleage, one question stops everybody cold: do you need the "silage special" model, or will a regular baler do? The silage version costs thousands more, and the salesman is happy to upsell it. Meanwhile the guy down the road is making perfect wrapped bales with a base-model baler he's had for fifteen years.
So who's right? The honest answer — pulled straight from farmers who bale wet every season — is "it depends on how much baleage you're going to make." Here's what a silage special actually is, how it's different from a bolt-on high-moisture kit, and how to decide which one you need before you spend the money.
Quick answer: A "silage special" round baler is built to handle wet, heavy, gummy forage — heavier roller shafts, extra scrapers or an auger to shed material that would otherwise pack onto the rolls, often endless belts and bigger tires for the heavier bales. You do not strictly need one to make baleage: plenty of producers make great wrapped bales with a standard heavy baler (4×5 and up), they just clean the rollers more often and make the bales a little smaller. A high-moisture kit (a scraper-and-spiral add-on) bridges part of the gap for occasional baleage. The rule of thumb from the forums: occasional baleage → standard baler or a high-moisture kit; serious volume → buy the silage special. Either way, those heavy wet bales still have to hold their shape for the wrapper, which is the net wrap's job.
What is a "silage special" baler, really?
Strip away the marketing and a silage special is a standard round baler with a handful of changes aimed at one problem: wet, sticky forage packs onto the rollers and belts, and heavy wet bales beat up the driveline. So the silage models add durability and self-cleaning. One long-time baler describes the specifics:
"I think on NH silage special balers they typically just have an extra scraper or two to help with buildup, endless belts, and larger tires due to heavier bale weights to help with compaction."
— Trotwood2955, HayTalk · High moisture kit vs. silage special round balers
Another producer points at the part that actually wears: the roller shafts.
"I know on the older balers the silage models came with heavier shafts in the bottom rollers for starters."
— mlappin, HayTalk · High moisture kit vs. silage special round balers
Put together, a true silage special usually means: heavier internal shafts and bearings, an auger or extra scrapers to keep wet material off the rolls, endless (solid) belts that don't trap forage in the lacing, and larger tires to carry heavier bales. On some models the upgrades are mostly about cleaning and durability rather than a completely different machine — one owner who compared parts books on his John Deere noted the "drive rollers & [bearing] part #s ... appear to be same part #s on regular & silage balers." The difference you feel in the field is that the silage model sheds gummy buildup and shrugs off heavy bales instead of fighting them.
Silage special vs. high-moisture kit: what's the difference?
This is where most of the confusion lives, because a "high-moisture kit" sounds like it turns any baler into a silage special. It doesn't — it's a lighter-duty version of the same idea. The clearest explanation came from a producer who has run both:
"The high moisture kit on JD is just a scraper and spirals on the end of the rolls where the silage special has a auger to move material out from inside the belts and will do a better job of keeping the roller cleaner preventing buildup. I have baled thousands of silage bales with a 458 with the high moisture kit and it will work but the rollers will really buildup the higher the moisture. If you take your time or are not doing that many it can be done."
— IH 1586, HayTalk · High moisture kit vs. silage special round balers
So the kit is a scraper-and-spiral retrofit that keeps the roller ends cleaner; the silage special adds an auger that actively moves material out from inside the belts, plus the heavier internals above. The kit is genuinely useful and not hard to install — but it has a ceiling. The same producer summed up the decision rule in a later thread:
"There is more to a silage special than the high moisture kit. I had a high moisture kit on my 458 and did a LOT of custom baleage. Only one issue that might have been resolved had it been a silage special. If you are thinking of baleage as a just in case scenario than the kit might be good enough but you have to pay attention to weather conditions. No baling with dew on. Clover or other high moisture crops need dried extra. If doing a lot get a S.S."
— IH 1586, HayTalk · JD 467, 468, 469 Silage Special Baler Questions
That's the whole framework in two sentences: kit for "just in case," silage special for "this is my system."
Do you actually need a silage special to make baleage?
For most producers making baleage occasionally, the answer is no. A standard baler handles wet bales — you just manage it differently. The reassurance shows up over and over:
"I run a stock BR7060 and have no troubles making silage bales/baleage. It is not a Silage Special or has any kind of add-on kit. Just a basic 7060. I know plenty of people who use base model JD balers who bale silage all the time with no issues. Sure you may need to get out and clean some rollers off once in a while, and you probably want to make the bales a little smaller than formal size due to weight, but the balers ought to handle it fine."
— Trotwood2955, HayTalk · High moisture kit vs. silage special round balers
Others confirm it bluntly:
"I am baling high moisture hay with a standard 467 and have had no problem."
— LaneFarms, HayTalk · If you put a High Moisture Kit on a JD baler, can you bale Haylage/Baleage?
Asked directly whether a silage special is needed to make 50% dry-matter bales, one experienced baler gave the cleanest one-liner on the trade-off:
"No, but will need too clean rollers more often than not."
— featherfarmer, AgTalk · Silage special on round baler
That's the real cost of using a standard baler for baleage: more roller cleaning, more attention to conditions, and a hard rule about not baling with dew on. The catch comes at the wet end of the range, where sticky crops gum up a standard machine fast — "at 50% I think that you will want the [silage special] as that is when the alfalfa starts to get gummy," as one South Dakota producer put it. So the decision really comes down to volume and moisture: a few hundred bales a year of manageable-moisture forage, a standard baler (with or without a kit) is fine; thousands of bales of wet alfalfa, the silage special pays for itself in saved aggravation and downtime.
How wet — and how big should the bales be?
Two numbers matter when you bale wet: moisture and bale weight. On moisture, the lighter "high-moisture" machines top out lower than a true silage special — one shopper noted a New Holland high-moisture 4×4 was rated to roughly 35% moisture while the silage special models could handle up into the 50–60% range. Check your specific model; the spread is real.
Bale weight is the one that surprises people. Wet forage is heavy, and the silage models carry a lower maximum bale weight than you'd expect, because you're hauling water. Operator manuals spell it out — and farmers learn to bale smaller:
"When I make balage I make the bales smaller than when I do dry hay. It is just easier on loaders, wrappers, and feeders. about 4ft ... let the hay dry some so it is not sopping wet. You dont want to haul a lot of water."
— the farmer 3, HayTalk · New Holland 640 Silage Special — max 50% moisture bale size
Real-world weights from the same conversation: one 648 owner makes "bales around 50 inches" and sold "40 bales [that] weighed 1250 a piece," noting his operator's manual lists a 1300-lb max for silage bales; another producer's NH 640 manual caps wet bales at 1000 lb. John Deere's own spec sheet for the 459 Silage Special, posted in another thread, lists a "maximum wet weight of 1750 lb." The takeaway: don't make baleage bales as big as dry-hay bales. Bale a little smaller, let sopping-wet forage dry down toward your target first, and you'll be easier on the baler, the wrapper, your loader, and your feeders. (If you're not sure where your forage actually sits, a moisture tester pays for itself, and our baling-moisture guide covers the targets.)
Buying a used silage special: what to check
Used silage specials hold their value, so you're often shopping older, higher-hour machines. One producer switching from square to round balers asked exactly the right questions:
"How many bales is too many? Should I worry about a machine that was not stored inside? Any years that I should avoid?"
— Saucymynx, HayTalk · NH 450 silage special — what to look for
A few practical filters from the threads:
- Bale count matters more than age. Producers routinely run 30,000+ bales through a good baler — one owner put 30,000 on each of two 467s — but bearings, chains, belts, and the pickup wear with use. Ask for a bale count and price the wear items in.
- Stored inside is a real plus. Belts and electronics on a baler that lived outside age faster. It's not a dealbreaker, but it's a bargaining point.
- Newer pickups and net-wrap systems are worth chasing. As one veteran of six John Deere round balers noted, "X67 & up have better netwrap attachment," and the "mega-wide pickup attachment on 467 & up was a game changing update." A wider pickup feeds heavy windrows more smoothly; a better net-wrap system means fewer wrap headaches.
- Confirm what's actually upgraded. On some models the "silage special" badge is mostly scrapers, belts, and tires; the core driveline parts can share numbers with the standard machine. Know what you're paying extra for so you can judge whether a standard baler plus a high-moisture kit gets you there cheaper.
And the oldest piece of baler-buying wisdom on the forum still holds: "get a bit more than what you think you might need because you might just need it down the road." (That producer recalled the silage model running roughly $9,000 more than the standard baler several years back — figures vary by year and model, so price your own options, but budget for the gap.)
Where net wrap fits on a silage special
Here's the part that's easy to overlook when you're focused on the baler: a silage special makes heavier, wetter, gummier bales, and a heavy wet bale that loses its shape is a problem all the way down the line. It bulges in storage, it's awkward for the loader, and — critically — it doesn't ride right on a wrapper. One producer running an individual wrapper learned that the hard way:
"If the bales are not perfectly round and exactly the same diameter from end to end the bale would rotate on the wrong axis ... I finally figured out that if I make the bales 55" instead of 60"+, it goes much better."
— Mitchco, AgTalk · Individual bale wrapper suggestions
Smaller helps, but the bigger factor is whether the bale holds its round, uniform shape from the baler to the wrapper — and that's the job of the net wrap wrapped in the chamber before the bale ever reaches the stretch-film wrapper. A firm, fully-wrapped bale stays round under its own wet weight, feeds onto the wrapper cleanly, and keeps its form in the stack. A poorly held bale slumps, and then the film job and the feed-out both suffer. If you're stepping up to serious baleage volume with a silage special, match it with net wrap that holds heavy, dense bales — and see our guide to handling wrapped bales without damage for the storage-and-stacking side. (Before you blame the wrap for a misshapen bale, it's worth ruling out the baler itself — our net wrap vs. baler issue guide walks through that.)
Frequently asked questions
What makes a baler a "silage special"?
A silage special round baler is built to handle wet, heavy, sticky forage. Compared with a standard baler it typically has heavier roller shafts and bearings, an auger or extra scrapers to shed material that would otherwise pack onto the rolls, endless (solid) belts, and larger tires to carry heavier bales. The goal is fewer plug-ups and longer life when you're baling at high moisture, not a fundamentally different baling process.
Can I make baleage with a regular round baler?
Yes. Many producers make excellent baleage with a standard heavy baler (4×5 and larger). The trade-offs are that you'll clean the rollers more often, you can't bale with dew on, very wet or sticky crops are harder, and you should make the bales a little smaller because wet forage is heavy. For occasional baleage a standard baler — or one with a bolt-on high-moisture kit — is usually plenty.
What's the difference between a high-moisture kit and a silage special?
A high-moisture kit is a lighter-duty add-on — usually a scraper and spirals on the roller ends — that keeps the rolls cleaner for occasional wet baling. A silage special goes further with an auger that moves material out from inside the belts plus heavier internals, belts, and tires. The kit handles "just in case" baleage; the silage special is for high volume. Producers who've run both say the kit works but the rollers build up faster the wetter you go.
How heavy can a silage special bale be?
It depends on the model — and the limit is lower than for dry hay because wet forage is heavy. Operator manuals quoted by farmers list maximums like 1,000 lb (NH 640), about 1,300 lb (NH 648), and 1,750 lb (JD 459 Silage Special). In practice many producers bale baleage around 4 ft to 50 in. diameter to keep weight manageable for loaders, wrappers, and feeders. Check your specific machine's manual.
Do I still need net wrap on a silage special baler?
Yes. The net wrap is what holds the bale's round, uniform shape coming out of the chamber — which matters even more on a silage special because the bales are heavier and wetter and more likely to slump. A firm, well-held bale feeds cleanly onto a stretch-film wrapper and keeps its shape in storage; a poorly held one bulges and rides wrong on the wrapper. Net wrap and stretch film do different jobs: net forms and holds the bale, film seals it for fermentation.
This guide is maintained by the XES Netting team — a bale net-wrap manufacturer. Producer comments are quoted verbatim with a thread link so you can read the originals. Model-specific weights and prices are as stated by farmers or operator manuals in those threads; verify against your own machine.
Related guides
Featured photo: Round baler (Feraboli Sprinter 180) by JLPC, licensed under CC BY-SA 3.0, via Wikimedia Commons.
