Tundra(2.0 and earlier)
Dirt is a common block in PickCrafter, which can be found in the Plain biome. It has 3 block wall sprites - bare dirt, grass-topped, and all grass, which all drop Dirt. Before Version 3.0, Dirt could also be found in the Tundra biome, which had an extra snow-topped block wall variant, and the Ocean biome. Starting with Version 3.8.3, Dirt can be obtained from the Block Select menu.