3mm Corten Tree Rings
Rolled in-house. One seamless join. Built to outlast the tree.
If you want a tree ring that looks like a single, continuous piece of steel around your tree — not a bolt-together kit — you've found it.
Made differently
We roll every ring at our Somersby factory from 3mm Bluescope Redcor Corten steel — substantially heavier and stronger than the thin-gauge imports most sellers ship. Inside the base of the ring, tucked low where mulch will cover it, we weld our own proprietary bracket system. Your ring arrives in one piece with a single split — enough to open, place around your existing tree or plant, then pull closed with the 316 marine-grade stainless hardware we include.
Once installed, the join is invisible from the outside. No staples, no exposed screws, no panelled look. It reads as one continuous ring — because that's essentially what it is.
What arrives at your door
- One pre-rolled, pre-welded 3mm Corten ring
- 316 marine-grade stainless steel hardware
- No construction. No tools required. Open, place, bolt, backfill — done.
Our 1520mm rings ship in two pieces for safe handling. Once installed and backfilled, both joins are equally indistinguishable from the rest of the ring.
The finish develops
Your ring arrives in raw silver steel. Over the first few weeks outside it transitions into a rich, even rust patina — and that patina then seals the surface and protects the steel underneath. Corten is the same material used for bridges and public sculpture; it's designed to live outside and get better with age, not worse.
Why 3mm matters
Thinner rings (1.5–2mm, common in the market) deform under mulch pressure, lose their shape, and flex when anything leans against them. 3mm holds its round permanently, sits heavily enough to stay put without pegging, and lasts for decades rather than years. It costs more to roll and more to ship — we've just never been willing to cut that corner.
Australian made, start to finish
The steel is Australian Bluescope Redcor. The rolling, welding, and packing is done by our team at Somersby, NSW. Every ring you buy keeps an Australian manufacturing job on Australian soil — and if that matters to you, you're buying from the right people.
