Quick answer: Cut alfalfa based on the balance you want between quality and tonnage — and let weather override both. For dairy-grade hay, cut in the late-bud to first-flower stage; for more tonnage and a tougher, longer-lasting stand, let it reach 10% bloom or beyond. Quality and yield move in opposite directions, so you can't max out both. Judge bloom by walking the field and checking 100 plants, but never hold out for a "perfect" stage through a good drying window — getting it dry beats getting it at textbook maturity. In the fall, avoid cutting in the 4–6 weeks before your first killing frost so the roots can rebuild for winter.
Knowing when to cut alfalfa is the single biggest quality decision you make all season — bigger than your baler, your rake, or your wrap. Cut early and you get rich, leafy, high-RFV hay but less of it. Cut late and you get tonnage and a tougher stand but lower test. There's no setting that wins both, so the real skill is matching maturity to your market and then bending to the weather. Here's how experienced growers actually call it.
Bud, bloom, and what each stage costs you
Alfalfa quality is highest before the plant flowers and falls steadily as it matures, because the stems build fiber (lignin) to hold the plant up. Yield does the opposite — it keeps climbing well past first bloom. That inverse relationship is the whole game:
"Quality and volume are inversely related so we try to optimize both… Maximizing one, hurts the other."
— Draft Horse Hay · HayTalk thread 92790
The clearest stage-by-stage breakdown on the forums lines up almost exactly with university extension guidance — dairy-quality hay comes from cutting at early bud, and maximum tonnage comes much later:
"The old standard for dairy quality used to be cut at 10% bloom… Now dairy quality is to cut when the alfalfa is in early bud stage. California says the best price is cutting at early bud stage. After that they might as well go for maximum yield which is between half and 75% bloom. After that the quality continues to fall AND so does the yield."
— hay wilson in TX · HayTalk thread 22583
Put rough numbers on it. Alfalfa cut at late-bud to first-flower typically tests around 170–185+ Relative Feed Value (RFV) — dairy territory. By the time it reaches 10% bloom it still tests respectably but has started down the slope, and past that it gets stemmy fast:
"If weather is good, bud stage to 10% bloom. At 10% bloom it still tests pretty good, but after that it starts to get a little woody."
— Beav · HayTalk thread 68050
So the first question isn't "what stage is textbook" — it's "who's eating it?" High-producing dairy cows need that early-bud RFV. Beef cows, growing heifers, and most horses do fine on slightly more mature hay that yields more per acre. Cut for your market, not for a chart:
"Most all agronomists are taught to raise dairy hay, period. When in fact a lot of hay is used in feedlots and by cow-calf guys. Raise your hay for what your market and uses are, not what the agronomist thinks you should be doing because that's what the book says."
— swmnhay · HayTalk thread 22583
If you're selling on a lab test, it pays to understand exactly what the buyer is grading — our guide on how to read a hay test breaks down RFV, RFQ, ADF, and NDF.
How to actually read percent bloom in the field
"Cut at 10% bloom" is useless if you can't tell what 10% looks like. The forum method is refreshingly low-tech — walk out and sample plants at random:
"Go out and count 100 plants. If you wonder where to count? Throw your hat out in a spot and count."
— panhandle9400 · HayTalk thread 22583
Percent bloom is the share of stems showing at least one open flower — so 10% bloom means roughly 10 of every 100 stems has a blossom. In practice it moves quickly, so don't agonize over the exact number:
"I would say when you just see a few, it is 10%. And it tends to change pretty fast after that anyway."
— swmnhay · HayTalk thread 22583
For dairy growers who want to cut before bloom even shows, extension agronomists use the PEAQ method (Predictive Equations for Alfalfa Quality): measure the tallest stem in a representative spot, note the most mature stage present (bud vs. flower), and read the estimated RFV off a chart. It lets you cut to a target RFV a few days ahead of first flower instead of reacting to bloom. Either way — hat-toss or ruler — the point is to scout the field, not guess from the road.
Weather beats the calendar — and beats bloom
Here's the rule that overrides everything above: a good drying window is worth more than a perfect cutting stage. The best maturity in the world does you no good if it gets rained on flat. Experienced growers say it flatly:
"But before anything, focus on cutting with a good weather window. Bloom comes second to weather."
— Teslan · HayTalk thread 68050
That's also why a pure calendar schedule is a trap. "Cut every 28 days" sounds tidy, but weather changes how fast the plant builds fiber — a wet spell can wreck your RFV even on a young-looking crop:
"Cut at 22 days and problem solved. When it is excessively wet, alfalfa makes more fiber quicker, thus lowering RFV. Common problem on 2nd and 3rd cut alfalfa in the humid, wet eastern corn belt. I have also seen 4th and 5th cutting in very dry weather go 35 days and be 200+ RFV."
— haybaler101 · HayTalk thread 92790
The takeaway: use the calendar as a rough guide (most stands cycle every 28–35 days), but let the field and the forecast make the final call. In a wet year, cut sooner than the calendar says; in a dry year you can stretch it and still test well. And don't be fooled by protein alone:
"Protein really doesn't figure into RFV/RFQ — it's more about fiber digestibility."
— reede · HayTalk thread 92790
Once you've decided to cut, the next job is getting it dry inside that window — see how to make dry hay faster, and if a shower threatens, a hay preservative can let you bale a little tougher rather than lose the cutting.
Yield matters too: don't cut too green for the wrong market
Cutting earlier isn't automatically "better." If you're after tonnage, cutting in early bud throws away both yield and growing season — and that lost growth is money:
"We don't cut any first cutting in early bud — you just lose too much tonnage… The big income robber at that point is you're losing growing season if you've got a mature crop standing in the field."
— endrow · HayTalk thread 68050
A balanced, season-long approach many growers settle on:
"Bud stage, with first blossoms, then about every 30–35 days (depending upon weather, naturally). Everyone can be different — if you want more quantity, cut later; quality, cut earlier; happy medium, cut in the middle."
— r82230 · HayTalk thread 68050
The fall "no-cut" window: protect the stand
Cutting timing in late summer and fall isn't about quality at all — it's about whether your alfalfa survives the winter. After each cut, the plant pulls carbohydrate reserves out of its roots to push new growth; it only refills those reserves once the canopy regrows. Cut during the wrong fall window and the plant goes into winter with an empty tank.
The widely taught rule — and the forum rule — is to avoid cutting in roughly the 4–6 weeks before your average first killing frost (about 24–28°F). In much of the Midwest that's roughly September into mid-October. Cut before that window so the stand can rebuild, or wait until after a hard freeze has shut growth down. This matters most on young stands:
"Regardless, never cut 1st-year alfalfa within 4 to 5 weeks of your expected first frost — it really needs time to recover, and young crowns are very vulnerable to damage."
— carcajou · HayTalk thread 68050
There's a related longevity trick: letting one cutting a year go all the way to bloom helps the stand last, because flowering sends nutrients back down to the crown:
"Nutrients start going back down into the crown to feed the next cutting."
— swmnhay · HayTalk thread 22583
First-year and new-seeding alfalfa
A brand-new stand plays by slightly different rules. Many growers deliberately let the first cutting on a new seeding mature further — toward 50% bloom or more — to build root reserves and thicken the stand, accepting lower quality on that one cutting:
"JMO, but I'd let it get to 50% bloom one cutting — especially if you are looking for longevity of the stand."
— swmnhay · HayTalk thread 22583
And if weather turns after you've cut a new seeding, get the windrows off the field fast — tender seedlings smother under a wet windrow:
"If the weather does not cooperate after a cutting, GET IT BALED OFF! Tender alfalfa seedlings cannot handle a windrow on them for long."
— carcajou · HayTalk thread 68050
A simple cutting plan
- Decide your market first. Dairy/premium hay → cut late-bud to first flower. Beef, horse, or tonnage → 10% bloom or a bit beyond.
- Scout, don't guess. Toss your hat, count 100 stems for percent bloom, or use a ruler and the PEAQ chart to cut to a target RFV a few days before flower.
- Let weather win. Cut into a solid drying window even if maturity is a touch early or late. A rained-on perfect-stage cutting still tests worse than a dry one.
- Treat 28 days as a guide, not a law. Cut sooner in wet weather (fiber builds fast), later in dry weather.
- Mind the fall window. Don't cut in the 4–6 weeks before your first killing frost; cut earlier or wait until after a hard freeze.
- Baby new seedings. Let one early cutting mature for the stand's sake, and get windrows off fast.
If you round-bale your alfalfa, the cut-timing decision flows straight into a baling-moisture decision — keeping those expensive leaves attached is its own skill, covered in round-baling alfalfa without losing the leaves.
Where XES fits
Everything above exists to grow one thing: leafy, high-RFV alfalfa. That hay is also the most valuable — and the most perishable — forage on your place, so it's the last thing you want weathering on the outside of a bale. We make bale net wrap, and its job starts the moment a premium cutting leaves the chamber: full-width net holds the round bale tight and sheds rain so the quality you timed so carefully doesn't bleach and rot in the stack. If those bales live outside, pair good wrap with a dry base and smart stacking — see how to store round bale hay. Time the cut right, dry it fast, then protect what you grew.
Frequently asked questions
When should you cut alfalfa for the best quality?
For top dairy-grade quality, cut in the late-bud to first-flower stage, before much bloom shows — that's when Relative Feed Value is highest, typically around 170–185+. Quality falls steadily as the plant flowers and builds stem fiber, so waiting for bloom trades test points for tonnage. Always prioritize a good drying window: a rained-on early cutting tests worse than a dry one taken slightly later.
What's the difference between cutting at bud stage and at bloom?
Bud stage (before flowers open) gives the highest quality and protein but the least tonnage, ideal for high-producing dairy cows. Cutting at 10% bloom still tests well and yields more; past that the hay gets stemmy and woody, with quality and eventually yield both falling. Quality and yield move in opposite directions, so you choose a point on that curve based on your market — you can't maximize both.
How do you tell what percent bloom alfalfa is at?
Walk the field and sample plants at random — a common trick is to toss your hat and count the stems where it lands, out of 100. Percent bloom is the share of stems showing at least one open flower, so 10% bloom is about 10 blooming stems per 100. Bloom advances fast once it starts, so scout every day or two as you approach your target stage.
Should you cut alfalfa on a 28-day schedule?
Use 28 days as a rough guide, not a rule. Most stands cycle every 28–35 days, but weather changes how fast the plant builds fiber — in a wet spell alfalfa makes fiber faster and can lose RFV by 22 days, while in dry weather a cutting can go 35 days and still test 200+. Let the field's maturity and the forecast make the final call rather than the calendar alone.
When should you stop cutting alfalfa in the fall?
Avoid cutting in roughly the 4–6 weeks before your average first killing frost (about 24–28°F), often early September to mid-October in the Midwest. Cutting in that window stops the plant from rebuilding the root reserves it needs to survive winter. Cut before the window so the stand can recover, or wait until after a hard freeze has ended growth. Young, first-year stands are especially vulnerable.
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. Agronomic ranges (RFV targets, the fall critical window) reflect standard university extension guidance; confirm specifics for your variety and region.
Featured photo: Cultivo de alfalfa en el valle del Chubut (alfalfa field) by Gastón Cuello, licensed under CC BY-SA 4.0, via Wikimedia Commons.
