Crimson Seeds

Crimson Seeds are a type of seeds which can be planted on Dirt Blocks. If done so, they will spread the Crimson in all directions through Crimson Grass. They can only be obtained in a Crimson world, either as a drop from the Eye of Cthulhu or purchased from the Dryad for each, during a Blood Moon in a Crimson world. They are also the only seeds to not appear in the 3DS version, even though the Corrupt Seeds are

Tips

 * Crimson grass may also be obtained by planting regular grass and using Red Solution on it.

History
猩红种子 Graines carmin