Free arborist wood chips and what to ask before you accept a load

The chips are free. The questions are the price. A tree crew will happily dump ten cubic yards of fresh wood chips in your driveway to avoid a dump fee, and most of the time that is an excellent trade. The times it is not, you can trace back to one skipped question.

What arborist chips actually are

Arborist chips are everything the chipper ate: wood, bark, cambium, leaves if the tree was in leaf, and the occasional surprise. The load is mixed species, coarsely chopped, unscreened, and still biologically alive. That is the entire point.

Bagged mulch is the opposite product. It is screened to a uniform size and dried for the bag, so it looks tidy and covers soil without feeding much of anything. Dyed mulch usually starts as scrap wood, pallets, and construction waste, colored with iron oxide or carbon black so it stays rich-looking all summer. The dye is the least of it. The problem is what is missing: no leaves, no cambium, a diet of pure stale carbon for soil life. Bark mulch is the bark washed off lumber, pretty in a front bed and prone to floating downhill in a gulper rain. Arborist chips break down into real soil structure because they carry the whole tree, leaves and all. A forest floor does not get bagged mulch.

How free delivery works

Tree services pay to dump chips at brush yards and recycling facilities, by the load. Your driveway is closer than the brush yard and free, so crews and dispatchers keep lists of addresses that want drops. Some crews call with a few hours’ notice. Some just appear. There are services and apps that match arborists with homeowners for exactly this trade.

Understand the shape of it. You are not ordering a product. You are accepting a byproduct, in truckload quantities, at the moment the truck happens to be full. There is no species selection, no half loads, and usually no delivery window narrower than today or tomorrow. Say yes when a crew is doing a removal two streets over, and you get whatever their day produced.

The alternative costs you a shovel. Several Central Texas cities let residents self-load at municipal brush recycling sites, free or cheap. You control what you take that way, in smaller volume and with a morning’s labor attached.

The questions to ask before you say yes

Ask these in one breath on the phone. Good crews answer easily, because they hear them from every gardener on their list.

What species came down? Mostly oak, elm, hackberry, ash, juniper, cedar, and mesquite in this region, all fine for paths and tree rings. Loads with palm in them are stringy and annoying to spread. A juniper-heavy load smells wonderful and lasts years.

Was anything diseased? In Central Texas the disease that matters is oak wilt. Ask directly whether the load includes oak wilt wood. Established crews keep infected material out of chip deliveries because their reputation depends on it, but ask anyway. If the answer is vague, age the pile for a season and keep it well away from the root zone of your live oaks. Obviously rotten wood and conks get the same judgment call.

Was the site sprayed? This is the sleeper question. Right-of-way clearing and brush removal are commonly treated with herbicides, and persistent ones can ride through into the chips and then into whatever you grow in them. Ask whether this was a routine pruning or a clearing job on a property or utility easement that was sprayed. If it was sprayed, keep the load on paths away from food beds, or pass entirely. The NC State Extension page on herbicide carryover explains the chemistry in detail; our article on no-till beds on Central Texas clay and caliche covers what it means for garden inputs.

How fresh is it? Fresh chips are fine for paths and tree rings immediately. They are not compost, and they are not finished mulch for a seedbed. Freshness mostly tells you how hot the pile is going to get.

Any black walnut in the mix? Walnut roots, hulls, and leaves carry juglone, a compound that sets back tomatoes, peppers, eggplants, and other sensitive plants. Black walnut is uncommon in Central Texas, but crews travel, and trees east and north of here carry it. It costs ten seconds to ask.

What is the seed load? If the job was removing ligustrum, chinaberry, Chinese tallow, nandina, or tree of heaven, the load carries seed. The pile’s own heat kills a share of it, not all, and the survivors show up as weeds in your paths. Ask what they took down that day. “A ligustrum removal” changes what you do with the pile.

Why the pile heats up

A big fresh pile starts cooking within days. Soil organisms hit the leaf and cambium fraction, and internal temperatures climb well past a hot bath. On a cool morning you can see steam coming off it. Reach in, and it is warm to the elbow.

This is decomposition, not a problem. The heat is a free partial seed and pathogen treatment, and it is why an aged pile carries fewer weed surprises than a fresh one. Two things follow. First, a hot pile is actively shrinking, losing a noticeable share of its volume in the first months as carbon leaves as gas, so accept more than you think you need. Second, a steaming pile is not mulch yet. Let it cool before laying it anywhere delicate, and never pile it against a trunk. Piles the size of barns can smolder. A driveway pile will not. It just cooks quietly and gets smaller.

Where chips belong

Paths. Tree rings out to the drip line, pulled back a few inches from the trunk. Established perennial beds. The top of an established vegetable bed as a winter blanket, raked back in spring. Anywhere you want weeds down, moisture held, and soil fed from the top.

Where they do not belong: tilled into the soil, against tree trunks, and on top of any spot you are direct-sowing seed. Surface chips feed the surface. Buried chips invite soil organisms to consume nitrogen while they digest the carbon, which briefly ties up the nitrogen your plants were counting on. Coarse chips on a seedbed are a wall a lettuce seedling cannot climb. The garden method on this site splits it deliberately, compost in the beds and chips on the paths, and every rule above is the reason why.

How big a load actually is

Ten cubic yards is the number to hold in your head. That is about 270 cubic feet, roughly a thousand square feet covered three inches deep, or one long garden path plus every tree ring on a quarter-acre lot. It is also, and I say this with love, about 80 wheelbarrow loads.

Where it lands matters as much as what is in it. Have it placed on your property, off the street right-of-way, so code enforcement has nothing to say. Aim for the end of the driveway or anywhere a truck can drive in and out forward, because reversing a claw truck over a water line is a story you tell for years. The truck needs overhead clearance too, so not under the low live oak limbs.

The neighborly week

The pile sits there a while. A week if you are ambitious, three if you are honest. It smells like cut wood for a day, then like a forest floor. Tell the household before it arrives, because a surprise steaming mountain on the driveway is a conversation nobody wins. Kids will annex it as a fort. Dogs will defend it as a throne. Neighbors will ask for a trailer load, and that is the cheapest goodwill on the block: hand them the shovel and wave.

When to pay for screened mulch instead

Pay when you need it now, because chip drops arrive on the crew’s schedule, not yours. Pay when the front beds need to look deliberate, because a load of everything the chipper ate that day looks like exactly what it is. Pay when you want a single known species or a fine, even texture around small seedlings, because screened, double-shredded mulch from a landscape yard is uniform in a way a truckload never will be. Chips for the back, screened mulch by the front door, and both end up as soil eventually. One of them arrived free.

Ask the questions, take the load, and move it one wheelbarrow at a time. The paths end up soft underfoot, the soil under them ends up darker each season, and the price is a phone call and a shovel.