Bush Hogging vs Forestry Mulching: Measure the Stems

Measure the thickest stems at knee height. Under 2 to 3 inches across, a bush hog mows the field, and our price is $75 to $400 an acre. Thicker saplings and trees need a forestry mulcher, which grinds stems up to 8 to 12 inches into mulch, from around $1,500 an acre. Neither machine kills the roots. Hardwoods such as sweetgum sprout back after both, so plan a follow-up mow in the first season.

We run both machines across Central North Carolina: a tractor-mounted rotary cutter for brush hogging, and drum mulching heads on tracked loaders for forestry mulching.

What size saplings can a bush hog cut?

Our line is 2 to 3 inches in diameter. Below that, a rotary cutter shears stems cleanly. Past it, stems bend and split instead of cutting, the blades take a beating, and the field looks chewed rather than mowed. Once a field’s saplings pass 2 to 3 inches, we quote it as a mulching job, not a mowing job.

That figure is our line for a clean job, not the limit of every machine. Cutter ratings vary with the model: the heavy-duty cutters in Bush Hog’s BH410 series are rated to cut 4-inch material and set a cutting height anywhere from 1.5 to 12 inches. A cutter that can get through a 4-inch stem still leaves a ragged, split stub at deck height, and that stub is the reason we stop sooner. If you mow your own fields, go by the rating on your own cutter.

Mulchers split by head type too. As a general rule, vertical-shaft heads top out around 6 to 8 inch material, while horizontal-shaft heads handle much larger. Ours are Fecon drum heads, the horizontal-shaft kind, and we plan around trees up to 8 to 12 inches. A mulcher is not a felling machine, so trunks over 12 inches may need cutting with a saw before the rest is ground.

Pro tip: You do not need calipers. Wrap a tape measure around the stem at knee height: about 6 inches around is a 2-inch stem, and about 9.5 inches around is a 3-inch stem. Check the five to ten thickest stems in the field, not the average one.

Will it grow back after you mulch or mow it?

Yes, from the roots, after either machine. A bush hog cuts a stem off above the ground. A mulcher grinds it off near the ground. Neither one pulls the roots out, so any species that sprouts from the stump or root crown comes back.

Sweetgum is the clearest case. It sprouts quickly and persistently after the top is killed, and it keeps that ability until the tree is about 50 years old. Cut or ground, the old root system pushes up new shoots; our sweetgum sapling guide covers how that flush behaves in a field.

So the mulch layer does not stop stumps from sprouting. It covers the soil and keeps the ground from sitting bare, but the roots underneath are still alive. Grass and weeds come back after a bush hog too, which is the point on pasture.

What stops a sprouter for good is a different job. For invasive plants, herbicide applied to freshly cut stumps and resprouting stems is the practical control. That is a licensed applicator’s work, arranged by the landowner; we do not apply herbicide. Without it, mowing is the follow-up: cut the resprouts in the first season while they are soft, then keep the field on a schedule. Budget for at least one follow-up mow after any mulching job.

What does the field look like afterward, and what comes next?

A bush hogged field looks mowed. A mulched field looks cleared. What you do next depends on which one you have.

After a bush hog: cut stalks lie on stubble at whatever height the deck was set. Woody stems leave stubs at that height, and the stubs of hogged saplings can puncture tires when the field is driven or mowed later. If your field was hogged over saplings and now bristles with stubs, a mulching pass grinds them down. Grass and forage regrow from the same roots, so a hogged pasture is simply ready for its next mow.

After a mulcher: stems are ground off near the surface and a 2 to 4 inch layer of mulch covers the ground. Stumps of the larger trees are ground down with everything else, but not below grade. If you need stumps out below the surface for a lawn or a building site, stump grinding is a separate step we offer in North Carolina.

From there, the next step is up to you:

• Back to pasture: the lime, seed and mowing sequence is in our guide to reclaiming an overgrown pasture.
• A house or barn site: we clear, and your grading contractor does the grading and pad work after us.
• Keeping it open: a mowing schedule, once or twice a year, keeps the field in the cheapest bush hogging tier.

Forestry mulching vs bush hogging, side by side

	Bush hogging	Forestry mulching
What it cuts	Grass, weeds, briars, saplings under 2 to 3 in	Brush, saplings and trees up to 8 to 12 in
Machine	Rotary cutter on a tractor	Drum mulching head on a tracked loader
What is left	Cut stalks on stubble, woody stubs	2 to 4 in mulch layer at ground level
Roots	Alive; grass and woody stems regrow	Alive; sprouting hardwoods regrow
Our price	$75 to $400 an acre; $250 to $500 minimum per visit	From around $1,500 an acre
The job	Keeping open land open	Taking back land that has gone to brush

Both prices move with the field. A bush hog job runs $75 to $150 an acre on a field mowed within the past year and $200 to $400 on one left three or more years. Most residential mulching and clearing falls between $1,500 and $4,500 an acre, with stem size and density setting where in that range a lot lands. The detail is in our brush hogging cost guide and forestry mulching cost guide.

Is a mulcher worth it for stems that small?

No. If the thickest stems are under 2 inches, a mulcher costs several times more to leave you with the same open field. Hog it, then keep it on a schedule.

The opposite mistake costs more over time: hogging a field of 3-inch saplings every couple of years. You pay for a rough cut each time, the stems come back from the same roots, and they keep getting thicker until the field is a mulching job anyway.

The middle case is a field of light growth with scattered thick stems or a few dense patches. That one does not have to be all one machine. Part of it can be hogged and the thick patches mulched, and we work out the split when we look at the property.

A mulcher also has limits a bush hog does not. On slopes of 20 percent or more, on broken ground and in very dense material, mulching slows down or stops working well. The head throws chips and debris, so we keep people, vehicles and anything breakable well back while it runs.

When the answer is both: mulch once, then mow

Many overgrown fields need both machines, one after the other:

1. Mulch the stems over 2 to 3 inches. One pass takes the field back to ground level and leaves the mulch layer.
2. Expect resprouts in the first season. Mow them while they are soft, or have a licensed applicator treat them.
3. Put the field on a mowing schedule. Once or twice a year keeps woody seedlings from getting past the 2-inch line again, and a field mowed within the past year stays in the $75 to $150 an acre tier.

The expensive path is skipping step three. A field left alone for a few years after mulching grows back toward another mulching job.

Frequently Asked Questions

Is bush hogging the same as brush hogging?

Yes. Bush Hog is a brand of rotary cutter, and bush hogging, brush hogging and rotary mowing all name the same job: a heavy rotary mower cutting overgrown grass, weeds and light brush.

Do I need a permit to bush hog or mulch a field in North Carolina?

Mowing pasture or hay ground is agricultural use, which the state’s sediment law exempts. Clearing for development is different: a project that disturbs more than one acre needs an erosion and sedimentation control plan filed 30 or more days before work starts. Near streams in the Neuse basin, periodic mowing is allowed only in the outer 20 feet of the 50-foot buffer; our Neuse buffer guide has the detail, and land clearing permits by county covers local rules. We clear; we do not file permits, so confirm with your county before a large job.

Can I mow a field the same year it was mulched?

Yes, and you should plan to. The first-season resprouts are soft and easy for a bush hog, which is why the follow-up mow is part of the plan rather than a sign the mulching failed.

Get the right machine for your field

Request a free quote and our crew will contact you to talk through the property, access and the clearing you need. We will tell you which machine fits, even when the answer is the bush hog and not the mulcher. You can also call (919) 525-3950.