Bulk vs Bagged Mulch: How Much You Need and Which Is Cheaper
One cubic yard of mulch equals 13.5 bags of the common 2 cubic foot size, and covers about 108 sq ft at 3 inches deep. Whether bulk or bags is cheaper depends mostly on how much you need and what delivery costs where you live. Here's how to decide. To skip the math, use the mulch calculator.
Step 1: Measure your beds
Multiply length × width for each bed in feet and add them up. For curved beds, estimate with rectangles, or measure the bed as a circle (π × radius²). Don't forget tree rings and the strip along the driveway.
Step 2: Choose a depth
- 1 inch: topping up mulch that's still in decent shape
- 2–3 inches: standard for flower and shrub beds
- 3–4 inches: new beds or weed-prone areas
More than 4 inches can keep water and air from reaching roots, and mulch piled against trunks invites rot and pests.
Step 3: Convert to cubic yards or bags
cubic feet = area (sq ft) × depth (in) ÷ 12
cubic yards = cubic feet ÷ 27
2 cu ft bags = cubic feet ÷ 2
Worked example
You have 300 sq ft of beds and want 3 inches of mulch:
- 300 × 3 ÷ 12 = 75 cubic feet
- 75 ÷ 27 = 2.8 cubic yards (order 3)
- Or 75 ÷ 2 = 38 bags of 2 cu ft (or 25 bags of 3 cu ft)
Which is cheaper?
Compare the two totals using your local prices:
bagged cost = number of bags × price per bag
bulk cost = cubic yards × price per yard + delivery fee
As a rough rule, bags win for small jobs (a yard or less), because there's no delivery fee and you only buy what you need. Bulk usually wins from about 2–3 yards up, because the price per cubic foot is much lower. If you have a pickup or trailer, many landscape yards will load bulk mulch for you, which removes the delivery fee entirely.
Other things to weigh
- Effort: bulk arrives as one pile on your driveway; you'll need a wheelbarrow, a pitchfork and a few hours. Bags can go straight to each bed.
- Choice: landscape yards often stock better double-ground hardwood and local options; stores offer more dyed colors.
- Storage: unopened bags keep, so you can spread over several weekends. A bulk pile should be spread within a week or two.
- Quality: look for mulch that smells earthy, not sour. Sour-smelling mulch can damage plants.
Topsoil and compost work the same way
The same volume math applies to topsoil and compost: choose Topsoil or Compost in the calculator to also see an approximate weight. They're much heavier than mulch, so check what your vehicle can carry before picking up bulk.