How to Lay Mulch

What You'll Need

Step-by-Step Instructions

1. 1
   Calculate how much mulch you need

   Measure your bed's length and width. Use the mulch calculator (link below) to get cubic yards and bag count. Order 10% extra for irregular shapes and settling.

   → Open Mulch Calculator
2. 2
   Edge your beds

   Use a half-moon edger or sharp spade to create clean edges. This defines where mulch goes and prevents it from spilling onto the lawn. Edges should be 2–3 inches deep.
3. 3
   Remove existing weeds

   Pull weeds by hand or treat with a natural weed killer 1–2 weeks before mulching. Mulching over established weeds only delays the problem.
4. 4
   Check existing mulch depth

   If you're refreshing, measure what's already there. If it's 2+ inches, you may only need 1 inch on top. If old mulch is matted and moldy, rake or remove it first.
5. 5
   Apply mulch at 3 inches deep

   Dump mulch in piles, then spread with a garden rake. Work systematically from back to front. Keep 2–3 inches of space around plant stems and 3–6 inches from tree trunks.
6. 6
   Rake to even depth

   Use a landscape rake to level. Check depth with a ruler in several spots — 3 inches is the target for most beds.
7. 7
   Water lightly

   A light spray helps the mulch settle and stick together, especially important in windy areas. Avoid saturating — mulch should be moist, not soaked.

Common Mistakes to Avoid

• ✗
  Volcano mulching: Piling mulch against tree trunks causes rot. Always leave a gap.
• ✗
  Too thin (<2 inches): Ineffective weed control and moisture retention.
• ✗
  Too thick (>4 inches): Suffocates roots and creates pest habitat.
• ✗
  Skipping weed removal: Established weeds will push through. Remove them first.
• ✗
  Using landscape fabric underneath: It degrades in 3–5 years, becomes impossible to remove, and blocks soil benefits.