Mulch for 100 Sq Ft Landscape
Free calculator with pre-filled dimensions • Updated March 2026
A 100 sq ft landscape area at 3 inches deep needs 0.93 cubic yards — about 13 bags (2 cu ft) or roughly 1 cubic yard bulk.
Open calculator with these dimensions →Mulching 100 Square Feet of Landscape
100 square feet is a common landscape bed size — perhaps a front foundation planting, a tree ring, or a side-yard bed. At 3 inches deep, you need 0.93 cubic yards. This is the threshold where bulk delivery starts to make sense over bagged mulch.
Bags vs. Bulk Comparison
| Option | Quantity | Cost (2026) |
|---|---|---|
| Bagged (2 cu ft) | 13 bags | $56–$98 |
| Bulk (per yard) | 1 cubic yard | $30–$50 + delivery |
Bulk mulch is cheaper per yard but delivery fees ($40–$80) can erase the savings at this volume. If you have a pickup truck, buying 1 yard of bulk mulch ($30–$50) saves 40–60% over bags.
Pro Tips
- 1 cubic yard covers about 108 sq ft at 3 inches. This is the key conversion to remember — it covers roughly a 10×10 area.
- Install landscape fabric first for non-garden beds. Under mulch around trees and shrubs, woven landscape fabric blocks weeds while allowing water through. Don't use plastic — it traps moisture and kills roots.
- Apply mulch before weeds emerge in spring. The best time is late spring after the soil warms but before weed seeds germinate. A thick mulch layer blocks light and prevents germination.
Frequently Asked Questions
How much mulch for 100 square feet?
At 3 inches deep, 100 sq ft needs 0.93 cubic yards — about 13 bags (2 cu ft each) or 1 cubic yard of bulk mulch. At 2 inches deep, you need 0.62 yards (10 bags).
Is it cheaper to buy mulch in bags or bulk?
Bulk is cheaper per yard ($30–$50 vs. $56–$98 in bags for 1 yard). However, delivery fees ($40–$80) can erase savings for small quantities. Bulk becomes clearly cheaper above 2 cubic yards.