Mulch, Mowers, and Tree Structure: May Mistakes to Avoid
Three common May problems—bad mulch, mower damage, and unchecked structure—often show up on the same estimate call. Here is how to prevent them.
May lawn care and May tree care collide on almost every residential lot we visit in Gilford, Meredith, and Laconia. Grass grows fast, mulch gets refreshed for curb appeal, and full leaves hide structural issues until a storm exposes them. Three problems drive a disproportionate share of our spring calls—and all three are largely preventable.
Homeowners often treat these as separate chores: landscaper handles beds, lawn crew handles turf, and tree work waits until something breaks. On the tree's calendar, mulch, mowers, and structure interact at the root collar and in the crown at the same time. Addressing them together in May saves repeat visits and protects trees you intend to keep for decades.
Mulch Volcanoes
Piling mulch against the trunk traps moisture on bark and encourages decay. Keep mulch in a donut shape, not a volcano, with a few inches of clearance around the flare. Depth should generally stay in the two-to-three-inch range over the root zone, not stacked against wood. Details are in our mulch ring guide.
Before you add fresh mulch this month, pull back old material. Years of refresh without removal bury flares and hide girdling roots. May is the right moment—beds are tidy, and you have not yet lost sight of the trunk base to summer growth.
String Trimmer and Mower Strikes
Repeated nicks on the same side of a trunk girdle the cambium layer. The tree may leaf out normally for a season or two, then decline on that side. Widen mulch rings or use hand trimming inside the ring so equipment stays away from bark.
Practical Boundaries
- Mark ring edges with low edging or stakes visible to lawn crews
- Hand-trim inside the ring; keep mower wheels outside
- Protect trees on tight lake paths where trimmers attack from two sides
- Inspect for fresh scars weekly in May when growth is fastest
See our April article on mower trunk stripes for early-season prevention detail.
Ignored Structure
Homeowners often focus on lawn and garden while deadwood and narrow forks sit in the crown until wind breaks a limb over the roof. A May walk after spring pruning timing considerations can catch hangers and weak unions before summer storms.
Schedule one combined property review if you are refreshing mulch and booking lawn service—three vendors working the same tree without coordination is how trunks get striped and volcanoes rebuilt in the same weekend.
Co-dominant stems, included bark, and end-heavy limbs over docks belong on the same list as mulch and mower fixes—not on a vague "maybe next year" note. Our May 4 article on co-dominant stems explains what to photograph from the ground.
Prioritize by Risk
Fix mulch and mower habits on every tree you want to keep. Schedule professional work first on limbs over paths, roofs, and docks. For shoreland lots, review shoreland protection rules before major clearing.
When bark wounds are deep or structure is compromised, pruning alone may not be enough. Compare signs with when to remove a tree and contact us for sequencing help.
If you hire separate lawn and tree vendors, share this priority list with both crews so mulch refresh and mowing boundaries align with any pruning scheduled for limbs over paths and driveways.
One Weekend to Reset Habits
Pick one May weekend to reset mulch shape, widen rings, and flag structural concerns for professional review. That single pass prevents the usual pattern where lawn care finishes before anyone looks up at the crown.
Summary
May mistakes repeat every year unless you break the cycle: volcano mulch, weekly trimmer stripes, and unseen weak forks. Correct mulch shape and depth, enforce equipment boundaries, and walk the crown while leaves still reveal structure. Prioritize hazards over targets you use daily. Cultural fixes and professional pruning together protect lake property trees through wind, guests, and crowded summer calendars.
Fixing Mower Damage or Mulch Problems?
We can assess bark wounds and recommend cultural fixes plus pruning if needed.