Estimate mulch volume, bags, and cost for landscaping.
Mulch Coverage Reference
Mulch conserves moisture, suppresses weeds, and improves soil health. Ordering the right amount saves money and ensures complete coverage.
| Depth | 1 Cu Yd Covers | Bags per 100 sq ft |
|---|---|---|
| 2 inches | 162 sq ft | 8-9 bags |
| 3 inches | 108 sq ft | 12-13 bags |
| 4 inches | 81 sq ft | 17 bags |
Frequently Asked Questions
How much mulch do I need?
Calculate area (length × width) in square feet, multiply by desired depth in feet, then divide by 27 to get cubic yards. A common depth of 3 inches over 100 sq ft requires about 0.93 cubic yards.
How deep should mulch be?
Apply 2-3 inches for flower beds and around trees. Use 3-4 inches for weed suppression and moisture retention. Don’t exceed 4 inches — too much mulch can suffocate plant roots and cause moisture problems.
How many bags of mulch do I need?
Standard bags hold 2 cubic feet. For 100 sq ft at 3 inches deep, you need about 25 cubic feet or 12-13 bags. Bulk delivery (by the cubic yard) is more economical for areas over 200 sq ft.
How much does mulch cost?
Bagged mulch: $3-7 per 2 cu ft bag. Bulk mulch: $20-45 per cubic yard. Delivery adds $50-100. Premium mulches (cedar, cypress, rubber) cost more. Buying in bulk saves 40-60% versus bags.
What type of mulch is best?
Hardwood bark mulch is most popular — affordable, attractive, and decomposes slowly. Cedar resists insects. Pine bark is acidic (good for azaleas, blueberries). Rubber mulch is permanent but doesn’t enrich soil.
How often should mulch be replaced?
Organic mulch should be refreshed annually and fully replaced every 2-3 years. Add 1-2 inches each spring. Rubber and stone mulch are permanent. Turn existing mulch before adding new layers.
Should I remove old mulch before adding new?
Not usually. If existing mulch is less than 3 inches deep and not matted or moldy, simply add new mulch on top. Rake and fluff existing mulch first. Remove and replace if it’s diseased or severely compacted.
Does mulch attract termites?
Mulch doesn’t attract termites, but it can provide a moist environment they favor. Keep mulch 6-12 inches away from your foundation. Cedar and cypress mulch have some natural insect-repellent properties.
How much area does one cubic yard of mulch cover?
One cubic yard covers: 324 sq ft at 1 inch deep, 162 sq ft at 2 inches, 108 sq ft at 3 inches, and 81 sq ft at 4 inches. These are the most common reference points for ordering.
Can I use mulch in vegetable gardens?
Yes! Straw, shredded leaves, and untreated wood mulch work well. Avoid dyed mulch or treated wood. Apply 2-3 inches around plants, keeping it 2-3 inches away from stems to prevent rot.