Corten Steel Tree Rings
A tree ring is a band of corten steel that circles a tree or a round garden bed. It holds a clean edge, stops grass and weeds creeping in, and weathers to a deep rust patina that suits the garden. Rings are made in two forms: whole rings and part rings.
Whole rings
A whole ring is a single continuous loop of steel. Use it to set a tree in a crisp circular pit, define a round bed, or ring a feature in a lawn. Because it is one piece, the circle is exact and the finish is seamless. We make them to your diameter in a range of heights.
Part rings (around an existing tree)
A part ring is an open arc, or a set of arcs, that closes around a trunk you cannot lift. That makes it the practical choice for an established tree: the sections slide into place around the base and bolt together, so you never disturb the roots. Ideal for a mature tree in a lawn or a bed.
Why corten
Weathering steel needs no paint or treatment and will not rot, crack or bow like timber or concrete edging. It is non-toxic and safe around edible gardens, and the patina is what gives it the warm, settled look. Read more on how long corten lasts.
Tree ring or round planter?
They look similar from across the yard, but they are different products for different jobs. Tree rings are a simple band of steel - whole or part - that edges a tree pit or a round bed. Round planters have folded edges and bolt together for a sturdier, more architectural finish, at a slightly higher price; they are a container, not an edging. If you want a container to grow in, see corten round planters.
Sizes and prices
Rings are priced by height and radius, so you order the exact circle you need. See the corten ring prices, or send us your measurements and we will price it for you.
Getting it right around a tree
Leave clearance between the ring and the trunk, and never bury the root flare: the tree needs to breathe and grow.
For an established tree, a part ring avoids lifting the tree; for a new planting, a whole ring gives the cleanest circle.
Mulch inside the ring to the same level as the surrounding soil, not up the trunk.
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If you want a container to grow in rather than a ring to edge with, our round planters are the folded-edge, bolted version. See also all corten planters, garden borders and raised garden beds.