User blog comment:Mathmagician/Hard Mode Farming/@comment-75.121.152.149-20111228171718/@comment-4674838-20111228183509

Glad you liked it. By the way, I forgot to mention it, but you can actually build farms in the underground before your world is on Hard Mode--that way you'll already have them set up when the hallow/corruption start to spread. I think that's the way to go... just not everyone (including myself) thinks of these things beforehand =P