Why Use Mulch?
Mulch is a layer of material applied to the surface of soil around plants. It conserves moisture, suppresses weeds, regulates soil temperature, prevents erosion, and adds organic matter to the soil as it decomposes. Proper mulching reduces watering needs by 25-50% and dramatically cuts time spent weeding.
The ideal mulch depth is 2-4 inches for most garden applications. Thinner layers allow weeds to penetrate, while thicker layers can suffocate plant roots and create moisture problems.
Mulch Volume Formula
Mulch Types Comparison
| Mulch Type | Weight (lbs/cu yd) | Lifespan | Best For |
|---|---|---|---|
| Bark Mulch | ~400 | 1-2 years | Flower beds, walkways |
| Hardwood Mulch | ~500 | 1-2 years | Trees, shrubs |
| Pine Straw | ~300 | 6-12 months | Acid-loving plants |
| Rubber Mulch | ~800 | 10+ years | Playgrounds |
| Compost | ~600 | 3-6 months | Vegetable gardens |
Frequently Asked Questions
How deep should I apply mulch?
Apply 2-3 inches for fine mulches (shredded bark) and 3-4 inches for coarse mulches (wood chips). Never exceed 4 inches as this can cause root suffocation and create habitat for rodents. Keep mulch 2-3 inches away from tree trunks and plant stems.
Should I buy bags or bulk?
For small projects under 3 cubic yards, bags are more convenient. For larger projects, bulk mulch delivered by the truckload is significantly cheaper - often 50-70% less per cubic yard than bagged mulch.
How often should I replenish mulch?
Most organic mulches need replenishment annually. In spring, remove old decomposed mulch or simply add a fresh 1-2 inch layer on top. Check depth periodically - if it has decomposed below 2 inches, add more.