Black Locust and Hackberry: Why Fencerow Stumps Grind So Differently

Two Trees, One Fence Line

Walk an old fence row on acreage around Millersville and you're likely to find both species mixed together, often within a few feet of each other. Black locust usually got there on purpose - it was planted specifically because its wood resists rot for decades, making it a favorite for fence posts long before pressure-treated lumber existed, and some of those planted posts eventually rooted and grew into full trees standing right in the line. Hackberry, by contrast, almost always shows up on its own. It's a fast, opportunistic grower that seeds itself readily along any fence line birds perch on, and it fills in gaps a farmer never intentionally planted.

Why Locust Slows Everything Down

The same density that made locust valuable as a fence post makes it one of the tougher stumps we grind. It dulls a cutting wheel noticeably faster than softer hardwood of the same diameter, and a trunk that's spent fifty or sixty years standing as part of a working fence has had that density baked in the whole time. We plan extra time into any fence-line job once we spot locust in the mix, and we check teeth more often mid-job than we would grinding an equivalent stretch of hackberry.

Why Hackberry Goes Fast, With a Catch

Hackberry is close to the opposite experience. The wood is soft and grinds quickly, and hackberry stumps often come from trees that fell on their own rather than getting cut, since the species is notorious for weak wood and shallow root systems that give out in wind or wet ground. The catch is exactly that shallow root habit - hackberry roots tend to spread wide rather than deep, which means the root flare on a hackberry stump can extend further out from the trunk than its diameter alone would suggest, especially on lower, wetter ground where the tree grew fast and never needed to root deep for stability.

What This Means for Pricing a Mixed Fence Line

A fence line with both species in it doesn't price as a simple average. Locust stumps push the estimate toward the higher end of their size bracket because of the extra grinding time, while hackberry stumps of a similar diameter land closer to the lower end. Telling us which is which when you call - even a rough guess based on bark texture, since locust bark is deeply furrowed and hackberry's is famously warty and corky - helps us build a more accurate quote before we ever see the property in person.