How Much Mulch Your Lake County Garden Beds Really Need
How deep to mulch, how to calculate cubic yards, and the mulching mistakes that quietly kill Lake County trees and shrubs.
Fresh mulch is the fastest way to make a yard look cared for. It also does real work, holding moisture, blocking weeds, moderating soil temperature, and protecting roots through our temperature swings. The trick is getting the depth right, because more is not better.
Aim for two to three inches
For most beds, two to three inches of mulch is the target. That is enough to suppress weeds and hold moisture without smothering the soil. When mulch gets piled much deeper it can actually repel light rain, keep the soil below too wet, and starve roots of oxygen.
How much to buy
Mulch is sold by the cubic yard. As a quick guide, one cubic yard covers about one hundred square feet at three inches deep, or roughly one hundred sixty square feet at two inches. Measure your beds, multiply length by width for the square footage, divide by one hundred, and you have your yardage at three inch depth.
For comparison, a bagged two cubic foot bag covers about eight square feet at three inches, so it takes roughly thirteen and a half bags to equal one cubic yard. Bulk delivery is almost always cheaper and less plastic once you are past a few beds.
Avoid the mulch volcano
The most common mistake we fix is mulch piled high against tree trunks and shrub stems, the so called mulch volcano. It traps moisture against bark that is not designed to stay wet, invites rot, insects and rodents, and encourages roots to grow up into the mulch instead of down into soil. Trees killed this way take years to die, so the cause is rarely connected to the effect.
Keep mulch pulled back two to three inches from trunks so the root flare, the spot where the trunk widens into the roots, stays visible and dry. A donut, not a volcano.
Refresh rather than rebuild
Beds do not need a full new layer every spring. Rake the existing mulch to break up any crust and fluff it, then add just enough new material to bring the total back to two or three inches. Adding three fresh inches on top of two existing inches every year is how beds end up six inches deep and anaerobic.
- Hardwood shredded mulch knits together and stays put on slopes, which suits most Lake County beds.
- Dyed mulches hold color longer but offer no soil benefit over natural bark as they break down.
- Avoid piling any mulch against house siding, where it bridges moisture and gives insects a route in.
- Pull weeds before mulching. Mulch suppresses germination but will not smother established weeds.
A fresh spring mulching makes the whole property pop, and it is quick for a crew to knock out. If you want your beds refreshed, call or text 224-634-0673 or 224-200-8363 for a free estimate.
Frequently asked questions
- How deep should mulch be in garden beds?
- Two to three inches. That depth suppresses weeds and retains moisture while still letting rain and air through. Beyond about four inches, mulch sheds light rain and reduces oxygen to the root zone.
- How many square feet does a cubic yard of mulch cover?
- About one hundred square feet at three inches deep, or roughly one hundred sixty square feet at two inches. Measure bed length times width, then divide the total square footage by one hundred for yardage at three inch depth.
- Why is piling mulch against a tree trunk bad?
- Bark is not built to stay wet. Mulch heaped against a trunk traps moisture, invites rot, insects and rodents, and encourages roots to grow upward into the mulch. Trees decline slowly over years, so the cause is often missed.
- Should I remove old mulch before adding new?
- Usually not. Rake the existing layer to break up crusting, then top up only enough to reach two to three inches total. Removal is warranted only when beds have accumulated excessive depth over many years.
Want a hand with your yard?
Ruiz Landscaping is Mario Ruiz's family-owned crew serving Vernon Hills and the North Shore. Free estimates, fair prices, fast replies.
Ruiz Landscaping serves Vernon Hills, Libertyville, Mundelein, Buffalo Grove, Lincolnshire, Long Grove and the rest of Vernon Hills's surrounding North Shore and Lake County communities.