POS add-on for terrariums that are genuinely established and grown-in, not simply recently planted. Use when the piece has had time to root, settle, grow together, and move through early maintenance or troubleshooting.
Mini / Medium Established: for smaller vessels where the maintenance and replacement burden is modest. Large / Statement Established: for larger vessels with materially greater ongoing care, moss volume, plant mass, troubleshooting, and space/time invested while the terrarium matures.
