Mulch is one of the best-value improvements you can make to a property. A fresh layer instantly sharpens the look of every bed, and underneath the surface it’s doing real work: holding moisture in the soil, keeping roots cooler in summer, and smothering the weed seeds that would otherwise take over. The question we hear most from homeowners around Kalamazoo and Portage is a practical one: how much do I actually need? Order too little and you’re back at the store; order too much and you’ve got a pile rotting on the driveway. Here’s how to get it right.
Start by Measuring Your Beds
Mulch is sold by the cubic yard, so the goal is to figure out how many cubic yards your beds will hold at the depth you want. Start by measuring the square footage of each bed. For a rectangular bed, multiply length times width. For odd shapes, break the area into rough rectangles and add them up, or treat a roughly round bed as length times width and accept a close estimate. Add all your beds together for a total square footage.
Pick the Right Depth
Depth is where most people go wrong in one direction or the other. For most established beds, a 2 to 3 inch layer is the sweet spot. That’s enough to suppress weeds and hold moisture without piling up so deep that it suffocates roots or sheds water before it can soak in. For brand-new beds with no existing mulch, aim for the full 3 inches. For a bed you’re just topping off, an inch or two to refresh the color and depth is plenty.
Resist the urge to go deeper than 3 inches in a single year. Piling mulch too thick, especially up against trunks and stems in the dreaded “mulch volcano,” traps moisture against the bark and invites rot and pests.
Do the Math
Here’s the simple formula. One cubic yard of mulch covers about 100 square feet at 3 inches deep, roughly 160 square feet at 2 inches deep, or about 320 square feet at 1 inch. So take your total square footage and divide:
- For a 3-inch layer: square feet ÷ 100 = cubic yards
- For a 2-inch layer: square feet ÷ 160 = cubic yards
For example, 600 square feet of beds at 3 inches deep needs about 6 cubic yards. Round up to the nearest half-yard when you order, a little extra is far better than coming up short halfway through.
Choosing the Right Mulch
Around Southwest Michigan, shredded hardwood is the workhorse. It knits together nicely so it doesn’t wash away on a slope, breaks down over time to feed the soil, and gives that clean, classic dark-brown look. Dyed mulches hold their color longer through the season if appearance is your top priority. Pine or cedar mulches bring a different texture and a pleasant scent and tend to resist compaction. For pathways or areas where you don’t want decomposition, stone or decorative gravel is the longer-lasting choice, though it won’t feed the soil the way wood does.
When and How to Apply
Late spring, once the soil has warmed and you’ve cleaned up the beds, is prime mulching season in our area. Pull the weeds first, because mulch suppresses new weed seeds but won’t stop established weeds from pushing through. Re-cut a crisp edge around each bed so the mulch has a clean line to sit against, then spread it evenly and keep it pulled back a couple of inches from tree trunks and plant stems. Fresh mulch over tidy, re-edged beds is one of the fastest ways to make a whole yard look cared for.
Mulch FAQ
How often should I replace my mulch? Most beds benefit from a fresh layer once a year, usually in spring. Wood mulch breaks down over the season, so you’re topping off the depth and refreshing the color rather than starting over each time.
Should I remove the old mulch before adding new? Usually not. If the existing layer has broken down and is under a couple of inches, just top it off. Only strip it out if it’s matted, moldy, or has built up well past 3 inches over the years.
Is mulch or stone better for my landscape? Wood mulch improves the soil as it decomposes and looks soft and natural, which suits planting beds. Stone lasts for years without replacement and works well for pathways, drainage areas, and low-maintenance zones. Many properties use both.
Let Us Handle the Heavy Lifting
Mulch math is easy enough, but hauling, spreading, and edging several cubic yards is a long, dirty Saturday. If you’d rather have it measured, delivered, and installed cleanly, with the beds weeded and edged the right way, we’d be glad to take it off your plate. We serve Kalamazoo, Portage, Mattawan, and Vicksburg. Reach out for a free quote and we’ll get your beds looking sharp.