I planted Crimson Seeds. Now what?

[Jtrain3600]

Hello all!

I killed this big Eye thing and got some crimson seeds. Was curious so I planted them outside.
It's spreading this red stuff around and killing nearby trees. Now these strong monsters are spawning next to my base.

Did I make a mistake planting them? How do I stop the monsters from coming in? They can open doors which makes them very annoying.

[exelsisxax]

You just created a Crimson biome by your house! Crimson is, you know, EVIL. Destroy all the red grass, trees, etc.

[curiositas]

You basically made a 'custom-made' crimson biome near your base with those seeds.
You can easily purify the grass by buying purification powder from the Dryad.

[Jtrain3600]

Hmmm that easy, eh?
Just destroy all the red things.

Thanks for the replies!

[curiositas]

Originally posted by Jtrain3600:

Hmmm that easy, eh?
Just destroy all the red things.

Thanks for the replies!

Biomes have certain requirements to be counted as an actual biome for the game. In this case it's a certain amount of crimson grass and/or crimstone blocks being near. It'll be tougher dealing with the evils once you enter Hardmode and NPCs will move out of houses that are near the Corruption/Crimson, so keep that all in mind.

[Acolyte]

XD he realises de mistake of spreading evil. just wait until hardmode me dude

[Acolyte]

then u wont hav just one of these custom made biomes to try and repel. u wuld hav 2. and de sources culd b anywhere

[Acolyte]

its probs gud tu use dem seeds somewhere contained and chek out de creatures tho. battling dem might help wen de whole land is covered in evil. just beat Wall Of Flesh and u wil kno wat i mean.

[Mideilós]

A lot of you are somewhat spoiling this person's experience when he clearly just wants to learn the game himself, only asking for clarification when he needs it. Think about what you say before you say it.
Be like this guy:

Originally posted by exelsisxax:

You just created a Crimson biome by your house! Crimson is, you know, EVIL. Destroy all the red grass, trees, etc.

[Acolyte]

Originally posted by Mitchell Snaw:

A lot of you are somewhat spoiling this person's experience when he clearly just wants to learn the game himself, only asking for clarification when he needs it. Think about what you say before you say it.
Be like this guy:

Originally posted by exelsisxax:

You just created a Crimson biome by your house! Crimson is, you know, EVIL. Destroy all the red grass, trees, etc.

i feel like this is somehow directed tu me ;-;

[Acolyte]

nevr said wud de 2 biomes r and wat dey du. i just told him dey wil be and spred and der r 2 of dem after he beats WoF

[Mideilós]

Originally posted by JEF DE DERPY BRO:

nevr said wud de 2 biomes r and wat dey du. i just told him dey wil be and spred and der r 2 of dem after he beats WoF

And now he starts wondering what this so called WOF is... or what this "other biome" is...

[curiositas]

Originally posted by Mitchell Snaw:

Originally posted by JEF DE DERPY BRO:

nevr said wud de 2 biomes r and wat dey du. i just told him dey wil be and spred and der r 2 of dem after he beats WoF

And now he starts wondering what this so called WOF is... or what this "other biome" is...

No one really spoiled anything, just mentioned some simple things that have just little to no explanation themselves. Whether the OP wants to spoil himself by looking through the wiki or other information source is entirely his own choice.