Definition
A tree surround (also known as a tree ring or mulch ring) is edging typically formed in a circular or geometric shape and installed around the base of a tree.
Tree surrounds serve both aesthetic and functional purposes including:
- defining a zone of protection around trees;
- preventing mower and trimmer damage to trunks;
- helping suppress weeds and grass encroachment;
- promoting moisture retention;
- allowing focused soil improvement through mulch, compost, or ground cover;
- defining space aesthetically in the landscape.
Constructing a tree surround can be a straightforward DIY project made with a variety of edging materials including wood, stone, metal, plastic or rubber. There are also commercially available pre-formed tree rings that aim for fast tree ring installation.
🎥 More on Video
Featured: constructing a 6-sided tree surround with common lumber.
Historical Background
The use of tree surrounds - circular planting or mulched zones surrounding a tree's base - has long been a technique in both ornamental and functional landscape design.
Historically, gardeners used informal borders of earth, stone, or wood to protect trees, retain moisture, and define growing zones distinct from turf.
Before commercial edging products were common, home gardeners often used hand-dug trenches or natural barriers to separate tree zones from lawn. Over time, this evolved into the use of mulch rings - a method still recommended today by extension services and urban forestry programs.
Today, wide mulch rings are promoted by municipalities and university extension programs as a simple yet powerful way to boost tree health and longevity.
Frequently Asked Questions
What is the purpose of a tree surround?
A tree surround helps protect the tree trunk, keeps weeds at bay, and holds mulch or soil in place. It defines a dedicated zone for moisture retention and visual emphasis.
How wide should a tree surround be?
Ideally, a tree surround should extend at least 2 to 3 feet from the tree trunk in all directions to cover the root flare and create a protective buffer zone. For mature trees, go wider if space allows.
Should I remove grass before adding mulch inside of a tree surround?
Removing sod and weeds that exist inside of a tree surround is a good practice. It prevents competition for water and nutrients and gives mulch and/or compost a better chance to break down into the soil and support tree health.
Can I use a tree surround for newly planted trees?
Yes - tree surround help define the root zone, retain moisture, and give young trees a visual anchor.
References
University of Maryland Extension - Mulching Trees and Shrubs
https://extension.umd.edu/resource/mulching-trees-and-shrubs
Iowa State University - Proper Mulching Techniques for Trees
https://hortnews.extension.iastate.edu/proper-mulching-techniques-trees
Clemson Extension - Tree Maintenance
https://hgic.clemson.edu/factsheet/tree-maintenance/