I want to keep my hallow 2/3 biomes away, no Crimson (my 4 block, one in the Jungle) 2 biomes away. Only Corruption on the edges of my world, 1 to 2 biomes away, 3 to 4 biomes away. Not right next to what was Jerry's house! (The Tavernkeep)
01 Answer
The best way to counter Biome Spread is the Clentaminator. You can use different types of solution to spread certain biomes.
Green Solution removes the Corruption, Crimson, and Hollow. This can be bought from the Steampunker while their living in the Forest biome.
Blue Solution spreads the Hollow. This can be bought from the Steampunker while they live in the Hollow.
Purple and Red Solution spread the Corruption / Crimson. These can be bought from the Steampunker during a Blood Moon or a Solar Eclipse.
It should also be noted that after you beat Planatara the biome spread begins to slow. While it still spreads quickly it does become more manageable.
And Sunflowers do prevent the Corruption / Crimson from spreading. It's only a 5 tile radius so the corruption can simply go under the sunflower but this can keep NPC's in houses that they would have moved out of if the Sunflower wasn't there.
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