The main difference between wood mulch and wood chips comes down to scope. Mulch is a broad category that covers any material you spread on soil to protect it. Wood chips are one specific type of mulch made from chipped branches and trunks. All wood chips can work as mulch, but not all mulch is made from wood chips.
The wood mulch vs wood chips debate matters because these products look and act quite different in your garden. Processed wood mulch is shredded bark with a uniform texture and steady color. Wood chips are coarser, chunkier pieces with bark, sapwood, and leaves all mixed in. I ran both side by side in my raised beds for a full season and saw clear gaps in how each held up.
My shredded bark mulch looked neat and tidy on day one but started breaking down within three months. The fine texture meant it decomposed fast and needed topping off by midsummer. My wood chip beds still had solid coverage at the end of the season with almost no bare spots showing through. The coarser pieces just take longer to break down.
WSU Extension research backs up what I saw in my own garden. Their studies ranked arborist wood chips among the best mulches tested for holding moisture and blocking weeds. The blend of bark, wood, and green leaves creates air pockets that let water soak through. At the same time, the thick layer blocks light from reaching weed seeds below the surface.
The bark mulch versus wood chips choice also affects decomposition and soil health. Shredded bark mulch breaks down into fine particles that can mat together and repel water if they dry out. Wood chips decompose into a loose, crumbly material that earthworms love. Over time, chips feed your soil biology better because the mix of wood and green material provides both carbon and trace nutrients.
Your choice depends on where you plan to put the material. Pick processed wood mulch for formal landscape beds near your front door where a polished look matters. Go with arborist wood chips for vegetable gardens, pathways, and large areas where results beat appearance. Chips win on function while processed mulch wins on curb appeal.
For most home gardeners, I recommend starting with free arborist wood chips. Contact a local tree service and ask them to dump a load on your driveway. You'll get better weed control and longer coverage than bagged bark mulch from the hardware store. Your soil will thank you as those chips break down into rich organic matter over the next few years.
The cost gap alone makes the choice easy for budget-minded gardeners. Processed bark mulch runs $30-50 per cubic yard while arborist chips cost nothing in most areas. A typical garden needs 5-10 cubic yards of mulch per season. That's up to $500 saved each year by choosing chips over store-bought mulch. Put that money toward plants instead and grow a much better garden for less.
Read the full article: 10 Best Uses for Wood Chips
