We recommend using the Thunderstore Mod Manager or an alternative for installing mods
This mod works with beech, fir, and pine trees (as those are the only ones I know that have actual saplings). It causes a sapling to grow when a stump of any of those three trees is destroyed.
Be careful, because the new sapling is delicate. By default there is now a delay of 2.5 seconds (configurable) before the spawn occurs.
This mod is now compatible with Planting Plus and Plant All Trees, allowing respawn of Oak, Birch, and Swamp trees.
A config file BepInEx/config/aedenthorn.TreeRespawn.cfg is created after running the game once with this mod).
You can adjust the config values by editing this file using a text editor or in-game using the Config Manager.
To reload the config from the config file, type plantmod reset into the game's console (F5).
To install, place the zip file contents in the BepInEx/plugins folder. You will need BepInEx.
Code is at https://github.com/aedenthorn/ValheimMods