A farmer picked up a new lease with blackberry through it. He did the obvious thing first — got the bush hog out and cut it down so he could see what he had bought. Here is what he reported afterward:
After I bushogged the blackberry took off like it had been fertilized. Kind of shot myself in the foot on that one.
— Tim/South, HayTalk, "Best way to reclaim overgrown field"
He was not careless. He was following the sequence that every renovation guide prints, including the University of Maine Cooperative Extension fact sheet on old hayfields, which lists "mow field with a rotary mower" as step three of six. That sequence is right for a field that has simply gone rank in grass. It is wrong — expensively wrong — for a field that has gone to woody perennials.
Reclaiming an overgrown field for hay is not one project. It is a decision tree, and the first branch is whether you intend to spray anything. If you do, mowing first destroys the leaf surface the herbicide needs. If you cannot spray — leased ground, an owner who says no chemicals, an organic buyer — then mowing is your primary tool and the timeline stretches to two or three years. Getting that one branch right is worth more than every other decision on this page combined.
Short answer
Walk it and identify what is growing before you spend a dollar. Rank grass, perennial broadleaf weeds and woody brush each need a different first move, and most fields have all three in different corners.
If woody brush is present and you can spray, spray first — then mow. Systemic herbicides enter through leaves and translocate to the root. Cutting the plant off removes the delivery system, and the crown regrows with its root reserves intact.
Triage, do not uniformly reset. On most neglected fields, a meaningful share of the acres only need a bush hog and corrected fertility. Full kill-and-reseed on ground that did not need it is the most common way to overspend here.
Fertility is the multi-year part. Soil pH can be corrected in a season or two; phosphorus and potassium levels on long-neglected ground are commonly a five-year build. Plan the money accordingly.
Budget two to four years, not one. Maine Extension puts the mow-and-fertilize-only route at three to four years to a good field. Full tillage and reseeding is faster but the input bill lands all at once.
Contents
- Your field is really three fields
- Why mowing first is usually the wrong first move
- The order of operations that actually works
- The seed bank is the part nobody budgets for
- Fertility: pH first, then P and K, then nitrogen last
- If you cannot spray: the mechanical road
- Do you actually have to reseed?
- Tillage versus no-till on rough ground
- What it costs
- Baling the first crop off reclaimed ground
- Frequently asked questions
Your field is really three fields
Stand at the gate of any field that has been idle for a decade and you will be looking at a mosaic, not a uniform problem. There is usually rank grass sod that has simply not been cut, there are patches of perennial broadleaf weeds, and there is woody encroachment working in from the fence lines and any wet or rocky corner nobody could get equipment into.
Maine Extension describes the succession precisely: without mowing, woody species such as alders, birches and poplars invade, bluegrass begins to dominate the other grasses, perennial weeds including milkweed, bedstraw, dandelion and red sorrel become prevalent, and without limestone the soil turns more acidic — which in turn favors more weeds. Frost action also begins bringing rocks to the surface, which matters a great deal when you get to the tillage question.
The practical consequence is that a single treatment plan applied fence to fence is almost always wrong. One HayTalk member who had taken on exactly this project got the most useful advice in the thread, and it was to stop planning a total renovation:
I would just bushhog some areas and start baling them-they will improve immensely on there own.
— Hayman1, HayTalk, "How to start hay in feilds not farmed for 10 years"
That is triage, and it is the highest-return move available on most of these fields. Grass that has been sitting under its own thatch for years is not dead. It has been shaded and starved, not killed. Remove the thatch, correct the pH, put phosphorus and potassium back, and a surprising amount of it comes back on its own — for the cost of fuel and fertilizer rather than the cost of a full seeding.
A walk-the-field checklist
Maine Extension frames the assessment as six questions, and they are the right six to answer before you price anything:
- Is there woody vegetation, and are there trees greater than two inches in diameter? Two inches is the practical line where a rotary cutter stops being the answer.
- What are the present soils — are there wet or dry sections? The wet corner is where the brush started and where it will come back.
- How rough is the site? Are there rocks or severe ruts that would obstruct equipment?
- How quickly do you want the field in production — one to two years, or three to four?
- What equipment is actually available to you? Not what you could rent in theory.
- What is the eventual use? Hay, pasture, exercise lot, crop ground, or just open scenic acreage. These do not have the same standard.
Add a seventh that the extension sheet does not ask because it assumes you own the ground: are you allowed to spray? If you are on a lease or a handshake, get that answer in writing before you build a plan around chemistry. It changes everything downstream. Our guide to renting hay ground covers the other terms worth pinning down before you invest inputs in somebody else's dirt.
Read the weeds as a soil test you get for free
Before the lab report comes back, the plants already growing there will tell you something. In a thread about whether to shred a field before haying it, one member made the point in six words:
Queen anne is a sign of poor soil.
Indicator species are not a substitute for a soil test — they are a reason to expect what the soil test is going to say. A field carrying Queen Anne's lace, broomsedge, red sorrel and moss is telling you about low fertility and low pH before you have spent the sampling fee. A field carrying nothing but rank fescue and blackberry is telling you it has been idle, not that it is poor.
Why mowing first is usually the wrong first move
Here is the mechanism, because it explains every recommendation that follows. Systemic herbicides — glyphosate for general burndown, triclopyr and similar chemistry for woody species — are absorbed through green leaf tissue and then translocated through the plant to the growing points and the root system. That translocation is what kills the root. Contact-only damage does not.
When you brush-hog a woody perennial, you remove nearly all of its leaf area. What is left is a cut stem and an intact root system holding a full season of stored carbohydrate. Spray at that point and there is almost nothing to absorb through. You get top kill on whatever green remains and the crown pushes new shoots from reserves you never touched.
The farmer at the top of this page found this out the hard way and then explained it better than most extension bulletins do:
The blackberry will need to be sprayed to kill. I bushogged some blackberry in a new lease last year. I later found out I needed to wait at least 6 months before spraying. Blackberry needs foliage and stem growth to carry the chemical into the roots.
— Tim/South, HayTalk, "Best way to reclaim overgrown field"
That "at least 6 months" figure is not folklore. Published brush-control guidance consistently directs you to treat full, actively growing foliage rather than stressed regrowth, and on vigorous woody species that commonly means waiting until the next growing season rather than a few weeks. The reason is the mechanism above: uptake and translocation both depend on healthy leaf tissue, and a freshly cut plant is spending its energy replacing shoots rather than moving anything down to the roots. Your county extension office can tell you the right window for the species you actually have.
The same member came back with the outcome across two seasons, which is the part that turns this from a principle into a number:
I bush hogged it level with the top of the grass then cut it for hay a few weeks later. Got 98 rolls. The blackberry came back thicker than ever and with a roar.
— Tim/South, HayTalk, "Best way to reclaim overgrown field"
Ninety-eight rolls is not nothing. That is the trap: mowing first produces a visible, immediately satisfying result — a tidy field and a real hay crop — while quietly resetting your brush-control clock by a full year. The cost is invisible in the season you pay it.
The one case where mowing genuinely comes first
If the brush is tall enough that you physically cannot get spray coverage on it, or dense enough that you cannot walk or drive the field, then a first cut is a legitimate access operation. The rule is not "never mow." The rule is never mow shortly before you intend to spray. If you cut for access, you are committing to waiting out a full flush of regrowth before the herbicide goes on.
Season matters too. Cutting woody material while it is dormant does very little either way, and the same is true of dormant grass:
If the grass is dormant, shredding won't knock it back unless you scalp it to stubble.
A late-winter shred to knock down last year's standing dead material, followed by letting the brush leaf out fully and spraying it in early summer, is a perfectly coherent plan. A June shred followed by a July spray is not.
The order of operations that actually works
Combining the extension sequence with the correction the forum record supplies, here is the version that holds up on ground with woody weeds in it.
| Step | What you do | Why it is in this position |
|---|---|---|
| 1 | Walk it and identify species; pull soil samples | Herbicide choice depends on what is actually there. Lime takes months to react, so the test has to be early. |
| 2 | Divide the field into zones by treatment needed | Most acres do not need the most aggressive option. This is where the budget is won. |
| 3 | Spray woody and perennial weeds on full foliage | Leaf area is the delivery system. This step must precede any mowing of the brush. |
| 4 | Wait out the label interval, then mow | Mowing too soon after application removes treated tissue before translocation finishes. |
| 5 | Remove the thatch — rake and bale it off if there is enough | Residue shades new growth and fouls a drill. Baling it off is cheaper than incorporating it. |
| 6 | Lime to target pH; apply P and K to soil test | Lime before final tillage if you are tilling, so it gets incorporated rather than sitting on top. |
| 7 | Pick rocks and stumps; decide till versus no-till | Frost has been lifting rock for as long as the field sat idle. |
| 8 | Re-treat escapes, then seed — or do not seed at all | A second burndown before planting catches the flush that came out of the seed bank. |
One HayTalk member laid out a version of steps 3 and 4 as a repeating loop rather than a single pass, which is the realistic picture when the brush is thick:
At this point you are probably 95% weed/brush free.
His sequence for a field he could get a mower into: chop it, let it regrow six to eight inches over two to three weeks, spray, wait about ten days, mow again, let it regrow another two to three weeks, and spray a second time. Note the shape of it — every mowing pass exists to produce fresh, uniform, sprayable regrowth, not to tidy the field. That is the mental model to carry.
Who to ask, and who not to ask
Herbicide selection for brush is genuinely local. Species mix, label restrictions, grazing and haying intervals and rotational limits all vary by state, and the restrictions on some brush chemistry — particularly around manure, compost and subsequent broadleaf crops — are strict enough to matter. The advice one member gave in that thread is worth repeating:
who aren't trying to sell you anything
— luke strawwalker, HayTalk, "Best way to reclaim overgrown field"
That was his description of extension agents, offered in contrast to seed and chemical salesmen. Your county extension office will identify the species for free and hand you the current labeled options for your state. Start there. We are a net wrap manufacturer, not agronomists or licensed applicators — read and follow the label, and confirm haying and grazing intervals for your situation before anything goes in a tank.
The seed bank is the part nobody budgets for
Killing the standing vegetation is the visible half of the job. The invisible half is the accumulated seed in the top few inches of soil, which is why a field that looked clean in September can come up solid weeds the following June.
The key will be to reduce the existing weed seed bank as much as possible. For some weeds, spraying alone will only kill the top weeds, not rhizomes. It can take as much as 5-7 years to eliminate the seed bank!
The same member opens with the diagnostic step that most people skip:
Before spraying, figure out what kind of weeds are currently in the field.
Two practical implications follow. First, plan on a second burndown after the first flush emerges and before you plant — you are killing the seed bank's first wave rather than planting into it. Second, if the seed bank is genuinely bad, consider putting an annual through the field for a season before you commit to a perennial stand. One member described exactly that: bush hog short, disk, let it sit until spring, total burndown, wait four to six weeks, plant a sterile sorghum-sudan as a smother crop, then establish the perennial the following season.
Another member on the same thread made the case for using Roundup Ready alfalfa as the clean-up crop on reclaimed ground with a legacy seed bank — you get a marketable hay crop while running a herbicide program that a conventional stand could not tolerate. If alfalfa fits your soils and drainage, our guide to establishing an alfalfa stand covers the seedbed and pH requirements in detail.
Whatever route you take, the second and third year of a reclaimed field will need ongoing broadleaf control while the new stand thickens. That is a different job from the initial reset, and it is covered in weed control in hay fields.
Fertility: pH first, then P and K, then nitrogen last
Neglected ground is almost always acidic, because nothing has been limed and nothing has been credited back for what earlier crops removed. Penn State Extension puts the target ranges plainly: grass forages want a pH of 6.0 to 6.5, and alfalfa and other forage legumes want 6.5 to 7.0 for the rhizobia to fix nitrogen effectively.
Sample at the right depth
This detail changes the recommendation you get back. Penn State advises routine samples from the surface to 6 or 8 inches — but only 3 to 4 inches in permanent pasture or hay fields that have been in long-term no-till. On those fields there is a second check worth doing: surface applications of nitrogen over years can create an "acid roof," a layer of acidity right at the surface that a 4-inch sample will not detect. Penn State's guidance is that if your regular sample does not call for lime, pull a second sample to 1 or 2 inches; if that pH is below 6.0, apply 1 ton per acre of limestone to the surface.
If pH is low through the whole plow layer and you are going to till anyway, incorporate the lime. Penn State is direct about the alternative: without incorporation, limestone's neutralizing ability may not penetrate much below the soil surface for many years.
Phosphorus and potassium are a multi-year build
This is the line item people underestimate. A member who had done this on real acres put the timeline at half a decade:
The big issues are P and K which take up to 5 years to get right if you plan on running a high management-high yield operation.
— Hayman1, HayTalk, "How to start hay in feilds not farmed for 10 years"
His own numbers illustrate the shape of the spend: he ran 140 to 170 units of P and K in the early years and was able to back down to 70 to 100 units after about five years, once soil test levels had come up into range. That is the "build and maintain" philosophy Penn State's lab uses — a component designed to build levels into the optimal range, plus a maintenance component sized to crop removal.
One caution from the same Penn State guidance: phosphorus is immobile in soil, so surface-broadcast P does not move down into the rooting zone, and it carries a higher runoff risk to nearby surface water. If your test calls for P, use a placement method that gets it into the soil with low disturbance where you can.
Go easy on nitrogen at establishment
The instinct on a hungry-looking field is to throw nitrogen at it. At establishment that backfires. Penn State's figure for a new pure grass stand is only 20 to 40 lb N per acre. In a mixed grass-legume seeding, excess nitrogen pushes the grass, suppresses the legume component you paid for, and stimulates weeds — which on reclaimed ground with a live seed bank is exactly what you do not want. Manure is a legitimate P and K source here, but rate it for the nitrogen it carries, not just the P and K.
Full-rate nitrogen belongs later, once the stand is established and you are managing for yield. Our guide to fertilizing hay fields covers the maintenance program.
If you cannot spray: the mechanical road
Plenty of this ground comes with a landlord who will not permit chemicals, an organic buyer, or a lease too short to justify a chemical program. The mechanical road works — it just costs time instead of money.
The mechanism is carbohydrate exhaustion. Every time you cut a woody perennial, it spends stored root reserves to push new shoots. Cut it again before it has rebuilt those reserves and the balance runs down. Cut it once a year and it wins.
I went the bushhog route with a couple of fields, takes 2-3 years to exhaust the larger brushes reserves so they don't sprout and ruin your crop.
— slowzuki, HayTalk, "Best way to reclaim overgrown field"
Maine Extension's version of the same principle, for fields that are smooth enough not to need tillage: regular mowing three times per season, plus appropriate fertilizer and lime, will produce a good field in three to four years. Regular mowing improves species composition and lets clovers come back on their own.
A HayTalk member working ground where the owner banned chemicals described what that first year costs and what it buys:
some beautiful green grass hay
That was his third cutting, after he brush-hogged the whole field early and gave up a cutting to do it. He also made a tactical point that costs nothing: run the brush hog high and take the seed heads off problem broadleaves before they mature, so you are drawing down the seed bank while you wait on the root reserves.
There is one thing the mechanical road does not fix, and it is worth being honest about:
Leaving the woody matter up and growing until hay season will only make matters worse later.
I personally would not run woody matter through my hay mower/rake/baler.
Woody stems are hard on sickle sections, rake teeth, pickup teeth and knotters, and they end up in bales that a horse customer will reject on sight. Shredding woody material is a rotary-cutter job, not a haybine job, and the residue is best left to break down or raked off rather than baled.
Do you actually have to reseed?
Often, no — and this is where the biggest savings live. Ask two questions.
First: is there desirable grass still in there? Part the thatch and look at the base. If you find live crowns of fescue, orchardgrass, bromegrass or bermuda under the mat, you have a stand that has been suppressed rather than lost. Thatch removal plus corrected fertility will bring a lot of it back. If you want to add species into that existing base rather than start over, frost seeding and no-till drilling are the tools, and our guide to thickening a thin hay field covers both.
Second: what is the field actually for? Ground destined for cow hay, bedding, or mulch does not need a pure seeded stand. Ground destined for horse hay or a certified market does. There is no point buying a $250-per-acre stand to make $40 hay.
When you do seed, one member's account of a real 40-acre reclamation is worth reading for the sequence and for the ending. He disked what he had mowed, then raked and round baled the thatch off, sprayed glyphosate, applied P and K to soil test, limed at 2 tons per acre, and drilled orchardgrass bidirectionally at 25 lb per acre. Then:
Then it didn't rain
For days
For weeks
For months
So I gave up
The stand came in the following February. That is the honest risk profile of a reclaimed-ground seeding: you can do every step correctly and still be at the mercy of rainfall, which is a strong argument for seeding into the window your extension service recommends rather than whenever the equipment is free. Maine Extension, for example, narrows it to May or the first three weeks of August for that state.
Tillage versus no-till on rough ground
Idle ground is rough ground. Frost has been lifting rock, the old sod has built root mass, and any wet spot has been rutted by whatever went through it last. That changes the tillage calculation from the one you would make on a working field.
The case against disking a long-established sod, from a member who had watched it happen:
If I was to disk, I would have bumps all over the field with OG root balls, the size of basketballs worked up on to the surface.
His alternative was to no-till drill the long way and then make a second pass at an angle for coverage, with a burndown after first cutting and another glyphosate application one to two days before planting. That two-pass angled drilling pattern is a cheap way to get uniform coverage without tillage.
Tillage still wins in two situations: when pH is low through the whole profile and lime needs incorporating, and when the surface is genuinely too rough to run hay equipment across at speed. Maine Extension notes that large bulldozers with rock rakes can remove rock and stumps without stripping too much soil, and that plowing, harrowing and additional rock picking will be needed before seeding — with liming done before the final tillage pass. If ground roughness rather than vegetation is your main complaint, smoothing rough hay fields deals with that problem directly.
What it costs
Two independent numbers, from different sources and different years, land close enough together to plan against.
Maine Extension published these average custom rates based on 2023 costs in that state: plowing $20 per acre; harrowing $16 per acre, needed at least twice; seeding $25 per acre not including seed; lime applied at 2 tons per acre, $90 to $100 per acre; and seed at $25 to $50 per acre depending on type. Add those at the midpoints and the tillage-and-seeding route runs roughly $190 to $215 per acre before fertilizer.
A HayTalk member in Tennessee, working from his own completed project, put the all-in figure this way:
To put in a pure stand of orchard you would look at about $250 per ac first yr
He was explicit that the figure was all-inclusive down to fuel and included putting the crop up, and he was getting 2.5 to 4.5 tons per acre in Tennessee off established orchardgrass. Another member on the smother-crop route estimated his total at around $40 per acre for the mechanical and burndown phase before the perennial seeding.
The spread between $40 and $250 per acre is the entire argument for triage. Both numbers are real; they apply to different acres. Sorting your field into which acres deserve which is the highest-value hour you will spend on the project. If you need to work out whether the resulting hay pays for any of it, how to price hay walks through the math, and starting a hay operation covers the equipment side.
Baling the first crop off reclaimed ground
The first crop off a reclaimed field is not normal hay, and it is worth planning for rather than discovering at the baler.
Expect it to be stemmy and uneven, with mixed maturity across the field because different zones broke dormancy at different times. Expect trash in it — old thatch, dead stems, occasional woody fragments, and rock if frost has been working. Expect the yield to be respectable and the quality to be mediocre. That combination points at a specific market: cow hay, bedding, mulch, or erosion control, not horse customers. Selling it as anything else damages a reputation you have not built yet.
Two practical baling notes. First, trashy, stemmy first-crop hay is hard on twine and easy on net wrap. Coarse stems and residue give twine wraps something to catch and roll on, and a bale built out of uneven-maturity material holds its shape better with full-width surface coverage than with widely spaced twine. If you are running a round baler, this is the crop where net wrap versus twine stops being a preference and starts being a shape problem. You can see our bale net wrap specifications if you are comparing rolls.
Second, these bales usually end up outside. Low-value hay rarely earns barn space, which makes the storage surface and the wrap coverage the two things standing between you and a rotted bottom third. Storing net-wrapped bales outside covers row orientation, spacing and base preparation.
One more piece of housekeeping: if the field carried noxious weeds and you intend to sell hay across state lines or into a regulated market, understand what certified weed-free hay requires before you promise anything. Reclaimed ground and weed-free certification are a long way apart in year one.
Frequently asked questions
Should I bush hog an overgrown field before spraying it?
No — not if you plan to spray woody or perennial weeds. Systemic herbicides enter through leaves and travel to the roots, so cutting the plant off first removes the delivery system and leaves the root reserves intact. Spray full foliage first, wait out the label interval, then mow.
How long does it take to reclaim an overgrown field into hay ground?
Plan on two to four years. University of Maine Extension puts the mow-and-fertilize-only route at three to four years to a good field. Full tillage and reseeding can produce a stand in one season, but the input bill lands at once and drought can still cost you the seeding.
How long after spraying brush can I mow or hay the field?
Follow the product label, which sets both the interval before mowing and any haying or grazing restriction. As a general shape, allow roughly ten days to two weeks after application before mowing so translocation to the roots can finish. Label intervals for haying are separate and often longer.
Do I need to reseed a neglected hay field?
Frequently not. Part the thatch and look for live crowns of fescue, orchardgrass, brome or bermuda. If desirable grass is present but suppressed, removing thatch and correcting pH, phosphorus and potassium will bring much of it back for a fraction of the cost of a full seeding.
What is the first thing to fix on reclaimed hay ground?
Soil pH. Penn State Extension targets 6.0 to 6.5 for grass forages and 6.5 to 7.0 for legumes, and lime takes months to react — so it has to be early. Phosphorus and potassium follow, and on long-neglected ground those are commonly a five-year build.
The bottom line
The instinct to get an overgrown field cut before you do anything else is a good instinct applied at the wrong point in the sequence. On grass, mowing first is fine. On brush, it costs you a year, because you remove the leaf area a systemic herbicide needs and leave a root system holding a full season of reserves.
Get the order right — identify, spray, wait, mow, feed, then decide about seed — and split the field into zones so the expensive treatment only goes on the acres that earn it. The gap between a $40-per-acre fix and a $250-per-acre reset is real, and most neglected fields contain both kinds of ground.
Then be patient with the fertility. Lime moves on a scale of months, and phosphorus and potassium on long-idle ground is commonly a five-year build. The field will look reclaimed long before it is productive. Bale the first crop for what it actually is, sell it to a market that wants that, and let the stand and the soil test catch up.
Related guides
- How to thicken a thin hay field
- Weed control in hay fields
- Smoothing rough hay fields
- Fertilizing hay fields
- How to start a hay operation
- Renting hay ground
- Establishing an alfalfa stand
- Certified weed-free hay
- How to price hay
- Storing net-wrapped bales outside
Hero image: bramble canes and rank dead grass choking a neglected field, with managed hay ground visible across the fence line behind it — the two halves of this project in one frame. Photo via Wikimedia Commons, used under its stated license.
