5mm, Anodized aluminium wire

Anodized aluminium wire is the preferred material for shaping deciduous trees, while annealed copper wire is better for evergreens. The wire can be wound around branches or the trunk of the tree to create pleasing bends, and will hold its shape even after being removed. For deciduous trees, wire is best applied in late spring through autumn, while evergreens are best wired in winter. Wire can also be used for guy wiring and securing trees in pots. Additionally, it can be helpful for fixing drainage mesh in place to prevent movement.