10×20 Flower Bed Mulch Calculator (200 Sq Ft)
A 10×20 foot landscape bed covers 200 square feet. At the industry standard 3-inch depth, it requires 1.85 net cubic yards. With a 12% natural settling and decomposition factor, contractor ordering volume is 2.1 cubic yards (or 28 bags of 2 cu ft mulch).
Bed Dimensions & Material
Adjust square footage or target layer thickness.
Natural dark brown shredded hardwood. Mats tightly on slopes, suppresses weeds, and retains moisture.
How many bags of mulch do I need for a 10x20 bed at 3 inches?
You will need 28 bags of 2.0 cu ft mulch (or 19 bags if using 3.0 cu ft bags), which accounts for natural settling and edge trenches.
Should I buy bags or get bulk mulch delivered for 200 sq ft?
At 28 bags (approx. 1,400 lbs), this is right on the threshold. You can haul 28 bags in two SUV trips or one standard pickup truck load. For larger beds over 3 cubic yards, commercial bulk dump delivery becomes significantly cheaper.
Do I need weed barrier fabric under the mulch?
For perennial flower beds, a permeable non-woven landscape fabric pinned with steel staples will reduce weed growth by up to 90% while allowing rain and liquid fertilizers to soak through to plant roots.