Quick answer: Cut oats for baleage at the milk to early-dough stage — that's the sweet spot for tonnage and quality. Unlike dry hay, you want oat baleage on the wet side (roughly 45–55%); dry oat forage turns straw-like and feeds poorly. Oats are forgiving: if you're baling wet, don't ted and scatter them — just cut, let them lie, then rake the windrows together and bale, usually the next day. The bottom of the windrow stays soaking wet, which actually makes it easy to rake to whatever moisture you want. Test for nitrates only if the crop was heavily fertilized and then stressed by drought or a hard frost.
Oats are the friendliest small grain to put up as forage. They establish fast, they're cheap, they tolerate being cut wet, and — planted with field peas as an oat-pea mix — they make genuinely high-protein feed. They're also the classic nurse crop: a lot of oat baleage gets made off a new alfalfa or grass seeding the same year it's established.
The whole job comes down to two decisions: what stage to cut, and how wet to bale. Here's how experienced hands handle both.
Cut at milk to dough stage
Oat forage quality peaks in a window from the boot stage through soft dough. The most common target for baleage is the milk stage — the heads are filled with a milky fluid but the kernel hasn't gone hard. Cut earlier (boot) for the highest protein and softest feed; let it run to soft dough for more tonnage and energy with a little less protein. Past hard dough, quality falls and the forage gets stemmy and straw-like.
If you're growing an oat-pea mix, the peas push protein up substantially, and the two mature compatibly — cut on the oats' timeline (milk to early dough) and the peas will be loaded with pods. Oat-pea is a favorite for backgrounding cattle and dairy heifers for exactly that reason.
How wet? Wetter than you think — and that's on purpose
This is where people coming from dry hay get it backwards. With small-grain baleage, dry is the enemy. As one Wisconsin operator put it bluntly when someone aimed for the dry end of the range:
"Why less than 40%? The dryer small grains are, the more straw-like. Wetter is better."
— Crete, Wisconsin · AgTalk thread 1004798
For oat baleage, a target around 45–55% moisture ferments well and keeps the feed soft and palatable rather than crispy and straw-like. Stay tight enough to pack and exclude air, but don't chase the low-40s the way you might with grass baleage. (If you're new to the moisture call, our baling-moisture guide walks through reading the crop.)
Don't ted it — just lay it down and rake it together
The big mistake when taking oats wet is treating them like dry hay: tedding and scattering to dry them out. You don't want that. The repeated advice is to leave them in a tight windrow and simply rake together right before baling:
"You don't want to turn it and let it lay if you're taking it wet — just roll them together. It will dry quicker than you think. We mowed in the morning, threw them together in the early afternoon, and had the round baler going before the rake was done. New alfalfa seeding with oats and peas — came out perfect on moisture."
— Farmer087, NW Illinois · AgTalk thread 1004798
The nice thing about oats is how predictable that bottom moisture is:
"Nice thing about oats is they'll still be soaking wet on the bottom before you rake — makes it easy to choose the moisture you want to bale at."
— mafrif, NC Iowa · AgTalk thread 1004798
A typical schedule: cut in the morning after the dew is off, let it wilt through the next day, then rake after the dew lifts and bale in the early afternoon. In hot, dry weather oats can hit baleage moisture by the afternoon of the day after cutting; in humid weather give it a bit longer. The warning that comes with big, heavy windrows: without raking, you can be at 40% on top and 70% on the bottom — so rake to even it out before you commit. A rake that flips and blends rather than ropes is ideal; see our rake selection guide.
Nitrates: usually a non-issue, but know the triggers
Oats can accumulate nitrates, but only under specific conditions — it's not something you worry about on a normal crop. The clean summary from the forums:
"As far as I understand, nitrates are only a concern when excessive fertilizer is applied, or if the crop is under some sort of stress — like a severe drought or a hard killing frost."
— Hagie pilot, Ontario · AgTalk thread 1079385
So: if you pushed the oats with manure or a heavy shot of nitrogen and the crop then hit a drought or got frozen before harvest, pull a nitrate test before feeding free-choice. Fermentation in a wrapped bale does reduce nitrate levels somewhat, but it doesn't eliminate them — testing is the only way to be sure. On a normally-fertilized, healthy crop cut at milk stage, nitrates are rarely a problem. For the full picture, see our guide to prussic acid and nitrates in baled forage (note: oats don't carry prussic acid — that's a sorghum-family issue — so nitrates are the only concern here).
The wrap
- Bale tight on the silage/wet-hay pressure setting to pack out air.
- Net wrap inside, film outside. Net wrap as the inner layer holds the bale's shape so the film seals cleanly; finish with 6 layers of silage film (8 in cool, wet climates).
- Wrap promptly. Wet oats ferment fast — get film on the bale the same day.
Oat and oat-pea baleage, start to finish
- Cut at milk to early-dough stage (boot for max protein, soft dough for max tonnage).
- Let it lie in the windrow — don't ted or scatter if you're taking it wet.
- Rake together after the dew lifts, usually the next day, to even out moisture.
- Bale at ~45–55% — wetter beats dry for small grains — with net wrap inside.
- Wrap promptly with 6–8 layers of film.
- Test for nitrates only if the crop was heavily fertilized and then drought- or frost-stressed.
Oats are about as forgiving as forage gets. Cut at milk stage, keep it on the wet side, rake to even it up, and you'll make soft, green, high-intake baleage cattle eat well.
Frequently asked questions
When should you cut oats for baleage?
Cut at the milk to early-dough stage — the heads are filled but the kernel hasn't gone hard. Cut at boot stage for the highest protein and softest feed, or let it run to soft dough for more tonnage and energy with slightly less protein. Past hard dough, oats get stemmy and straw-like and quality drops.
How wet should oat baleage be?
Aim for roughly 45–55% moisture. Small grains turn straw-like and feed poorly when they're baled dry, so for oats wetter is genuinely better — don't chase the low-40s the way you might with grass baleage. Bale tight enough to pack out air, but keep the forage on the moist side for soft, palatable feed.
Should you ted oats before baling them wet?
No. If you're taking oats wet, don't ted and scatter them — leave them in the windrow and simply rake together right before baling. The bottom of the windrow stays soaking wet, which makes it easy to rake to the moisture you want. A typical schedule is to cut in the morning, let it wilt through the next day, then rake after the dew lifts and bale in the early afternoon.
Are nitrates a problem in oat hay or baleage?
Usually not. Oats accumulate dangerous nitrates only when they've been heavily fertilized (manure or a big nitrogen shot) and then stressed by severe drought or a hard killing frost. On a normally-fertilized, healthy crop, nitrates are rarely an issue. If both triggers are present, pull a nitrate test before feeding — fermentation reduces nitrates somewhat but doesn't eliminate them.
What is oat-pea baleage and why grow it?
Oat-pea baleage is oats grown with field peas and wrapped wet together. The peas raise the protein content substantially while maturing on a compatible timeline, so you cut on the oats' schedule (milk to early dough) with the peas in pod. It's a popular high-protein feed for backgrounding cattle and dairy heifers, and it doubles as a nurse-crop forage off a new alfalfa or grass seeding.
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 is verbatim with a link to the original AgTalk thread — go read the discussions in full. This guide is general information, not nutrition advice; test questionable forage and consult your nutritionist or extension office before feeding.
Featured photo: A Round Bale by Michael Patterson, licensed under CC BY-SA 2.0, via Wikimedia Commons.
