Grass Wall

Type	Wall
Placeable	✔️
Use time	15 (Very fast)
Rarity
Buy	10 CC
Sell	2 CC
Research	400 required
Placed
Broken

The Grass Wall is a type of background wall which can be found naturally generated in above-ground tunnels and grottoes on the surface, considered unsafe. It does not drop as an item when destroyed, and can only be obtained by purchasing it from the Dryad for 10 CC each, while a Blood Moon is not occurring. It is considered a safe wall when placed by the player.

Notes

Grass Wall, Flower Wall, and Jungle Wall can be used to make Corrupt Grass Wall, Crimson Grass Wall, and Hallowed Grass Wall by using Purple, Red and Blue Solution, respectively. All three types can be undone with Green Solution, though this will always yield a Grass Wall (even if the original wall was a Flower or Jungle Wall).
Grass Walls (and their variants) have no actual relation to grass blocks.