Harmony Grass

is one of the six plants that players can collect in the world of TERA. It is used in Cooking.

is found by harvesting a Node. Harvesting a node will give players between 3-5. can also be acquired by chance when harvesting other plant nodes.

can also be acquired by chance when harvesting a Node.

Source
This plant can be found in almost all areas of the world. It is not limited to a certain region like other plants.