If you’ve ever seen a perfectly conical pile of mulch heaped around the base of a tree—like lava pouring from a volcano—you’ve witnessed a common landscaping mistake that’s slowly killing trees across the Finger Lakes. It’s called volcano mulching, and while it may look tidy, it’s anything but healthy for your trees.
At Feller’s Tree Service, we’ve seen the long-term damage volcano mulching can cause: rotted bark, strangled roots, declining trees, and even premature death. Whether you live in Canandaigua, Geneva, Naples, or any of our beautiful surrounding communities, here’s what you need to know—and why it’s time to say no to volcano mulching.
Don’t Bury Your Trees Alive
Mulch is great—when used properly. It keeps soil moist, controls weeds, and improves soil health. But when piled up against the trunk of a tree, it does more harm than good.
Here’s what volcano mulching actually does:
- Traps moisture against the bark, causing rot and fungal disease.
- Creates a hiding place for insects and rodents, which can damage the trunk and roots.
- Leads to girdling roots, where roots begin to circle and strangle the tree over time.
- Prevents oxygen from reaching the soil, stressing the root system.
These issues don’t show up overnight—but in a few years, a volcano-mulched tree may begin to decline and eventually die.
What Healthy Mulching Looks Like
Proper mulching is simple and effective. The Arbor Day Foundation recommends the “3-3-3 Rule” for best results:
- 3 inches deep
- 3 inches away from the trunk
- 3-foot radius around the tree
Think donut, not volcano. Your mulch should form a low, wide ring around the tree—never touching the bark.
Learn more from the Arbor Day Foundation: Mulching 101 – Arborist Advice
Why Volcano Mulching Is So Common
We get it—volcano mulching looks clean. It’s become a habit for some landscapers and homeowners who simply don’t realize the long-term damage it causes. Unfortunately, it’s often done in public spaces, commercial properties, and even by contractors who should know better.
If you’re hiring someone to mulch your trees, ask them to follow proper mulching techniques. And if you see volcano mulching around your trees—or inherited it from a previous homeowner—it’s not too late to fix it.
Can Volcano Mulching Be Reversed?
Yes—but time matters. If caught early, you can gently remove the excess mulch and allow the tree base to dry out and breathe. If roots have started to girdle or decay has set in, it’s best to have the tree evaluated by a professional.
At Feller’s Tree Service, we offer expert tree assessments throughout the Finger Lakes. We’ll check the health of your trees and let you know whether intervention is needed or if the tree can recover with proper care.
Healthy Trees Start from the Ground Up
The Finger Lakes region is known for its rich soils and beautiful natural canopy—but even the healthiest trees need the right support. Whether you’re caring for newly planted ornamentals or preserving 100-year-old oaks, proper mulching is one of the easiest things you can do to ensure long-term tree health.
Here’s a quick reminder of best practices:
- Never pile mulch against the tree trunk
- Use natural mulch (like shredded bark or wood chips)
- Refresh mulch annually, but don’t add layer upon layer
- Keep the mulch ring wide and shallow
When in doubt, call in the professionals.
Let Feller’s Tree Service Help You Protect Your Trees
If you’re unsure about the condition of your trees—or want a second opinion on your landscaping—we’re here to help. Feller’s Tree Service provides honest, knowledgeable tree care across the Finger Lakes, including tree removal, trimming, and consultations.
Whether you’re dealing with the aftermath of volcano mulching or just want your trees to thrive, our team is ready to assist. We’ve built our reputation on reliable service, local expertise, and respect for the trees that make this region so beautiful.