Mulch is essential for healthy gardens, suppressing weeds, retaining moisture, and regulating soil temperature. This calculator determines how much mulch you need for your flower beds, tree rings, and landscaped areas.
The ideal mulch depth is 2-4 inches. Too thin and weeds break through; too thick and you may suffocate plant roots and prevent water penetration. For weed suppression, 3 inches is optimal. Around trees, keep mulch 2-3 inches away from the trunk to prevent rot.
Mulch comes in bags (typically 2 cubic feet) or bulk by the cubic yard. Bulk delivery is more economical for large areas. One cubic yard covers 108 square feet at 3 inches deep. Common types include hardwood bark, cedar, pine nuggets, and rubber mulch.
Organic mulches decompose over time, enriching soil but requiring annual replenishment. Check depth each spring and add 1-2 inches as needed. Avoid piling mulch against building foundations where it can attract termites and cause moisture damage.
Quick Tips
- Always order 10-15% extra materials for waste
- Check local building codes before starting
- Measure twice, cut once — verify all inputs
Frequently Asked Questions
2-4 inches is ideal. 3 inches provides good weed suppression while allowing water penetration.
Hardwood bark lasts longest. Cedar resists insects. Pine is acidic, good for acid-loving plants.
Organic mulch needs topping off annually as it decomposes. Fully replace every 2-3 years.
Not necessary if depth is under 4 inches total. Fluff old mulch and top with 1-2 inches.
Yes, but apply thin layers (1 inch) as thick layers mat down and block water.