Trees

Trees are a terrain feature in Dota 2. They make up a large amount of the map, and are very prominent in the forests that separate the lanes and border the map. Trees block vision and are normally impassable.

Mechanics
Trees cannot be targeted by normal attacks, and can only be destroyed by certain abilities, such as 's.

Trees will regrow five minutes after they were destroyed except if a unit is standing within 150 range of where they would spawn. In this case, the tree respawns once the unit gets out of range. This is to prevent the unit to get stuck in the trees.

The console command to respawn all destroyed trees on the map is  (requires cheats to be turned on).

Trivia

 * There are currently 2491 trees in the Dota 2 map.