|The cover to Opeth's upcoming Heritage combines the tree as a symbol of life with symbols of death and evil.|
Let's explore the metalness of trees.
One obvious way to make trees more metal: hang a guy. Trees are the traditional place for hangings at least as far back as Judas, so why not?
|Hanging: Illwill by Lake of Tears, Niinkuin Hirtetyn Kasvot by Atem, Gallows Gallery by Sigh, and Unislent Death by Nails.|
Another solid method for making trees seem metal is to strip them of their leaves, perverting them into symbols of death.
|Draconian: Arcane Rain Fell; Fiends at Feast: Shadows of Extinction; Living Sacrifice: In Memoriam; Mercyful Fate: In the Shadows|
; Trouble: Psalm 9; Vintersorg: Jordpuls
Finally, you can make your trees metal by making them powerful--adding energy, or referencing the mighty Yggdrasil.
|The covers of Amorphis's Skyforger, Unleashed's As Yggdrasil Trembles, and Yggdrasil's Land Meiner Träume|
Of course, you could always go with the default, a tree as a symbol of life, if that's appropriate to your band's message.
|France's Gojira are famously all about the environment.|