You can make it by combining dirt with gravel in a 2x2 crafting grid, or hunt some down in the Mega Taiga, Mesa Plateau or Savanna Plateau biomes.Feb 23, 2018
Coarse dirt can be crafted from 2 dirt and 2 gravel.
Coarse dirt has the ability to grow saplings, sugar canes, mushrooms, bamboo, flowers, and sweet berries which can be planted directly under appropriate conditions.
Issues relating to "Coarse Dirt" are maintained on the bug tracker. Report issues there .