Farming is the intentional creation of resources to be collected repeatedly over time. Many kinds of farming involve planting Seeds to grow grass, trees, or flowers, though some kinds of farming such as Crystal Shard or statue farming do not involve seeds. Seeds include:
- Jungle Grass Seeds, used to grow Jungle Grass on Mud. Collected in the Jungle from breaking grass/weeds
- Corrupt Seeds, used to grow Corruption on dirt. These are dropped from the Eye of Cthulhu or bought from a Dryad on a Blood Moon
This tactic is mostly for endgame players who just want to get items and gold. This is also a great way to farm the chest Key Molds for the late game dungeon chests. You will need any type of solid block and any pet or minion that can fight enemies. Accessories and armor that increase minion numbers are also helpful and could help this farm work more efficiently. You will need to surround yourself in the block of your choosing and spawn the minion outside of your shield. You can leave the game running for a while and check back every once in a while to pick up the dropped items and gold.
To farm trees, you will need acorns which can be obtained by simply chopping down a tree. A tree farm is just a flat area with acorns planted. The saplings must be spaced apart with 2 empty spaces on either side. Periodically "mow the lawn" or cut the grass on your tree farm because it stops trees from growing in those places. If you have access to the jungle, then you can skip the acorns entirely, as Jungle trees grow automatically on the Jungle floor.
It is also possible to repeatedly create a world, cut down the many tall trees at the starting area, collect the wood then delete the world.
You can create a Vile Mushroom farm using Corrupt Seeds. If it's close enough to your NPCs, the reduction in enemy spawns will keep any mobs from showing up. However, you still need to be careful, as enemies may still be able to spawn if the Corruption spreads too much. Creating corrupted terrain too close to your NPCs will make them leave their Homes.
Glowing Mushroom Farm
Farming these may be your best choice. To create a farm you must first have Mushroom Seeds (obtained from cutting down mushroom grass). Place rows of mud in any location that is in at least the dirt layer of the Underground and plant your seeds.
Farming Glowing Mushrooms will allow you to create different healing potions such as Healing Potions, and may be worthwhile to set up a farm early-game. These will become more important in Hardmode to craft Shroomite Bars and the items that require said bars.
To create a regular Mushroom farm make sure there is no wall behind it so it has natural lighting and make long platforms of grass. Mushrooms will grow on these and you can then harvest them.
There are various flowers that you can farm that are useful while making Potions. Clay Pots are a good way to plant flowers, but they can also be planted in normal dirt. However, clay pots are also used for decoration purposes and a worthless flower will eventually grow up if nothing is planted in it. These flowers can't be harvested - they're basically equivalent to the basic vegetation found in most biomes. If you are farming flowers in a pot, you can harvest them with a Pickaxe. Plants will only drop seeds if they are 'blooming' (ie. fully grown).
Blinkroot blooms randomly. Can be found Underground. Seeds can only be harvested when the flower is blinking, emitting small amounts of light.
Daybloom blooms during the daytime. Found aboveground in any biome but the Corruption or the Crimson.
Moonglow blooms at nighttime. Found in the Jungle.
Crystal Shard Farming
Crystal Shards are possible to farm if you have unlocked Hard Mode. To make this farm, you will need to have an
Underground Hallow area, Pearlstone, and some Torches for lighting the area. When you found an area where you can see some Crystal Shards growing, clear out an area and make a good size square out of your Pearlstone. Add some rows that your character can walk on, and you'll have a Crystal Shard Farm. Hallowed monsters will start spawning in the farm due to the Pearlstone, though putting up a background wall in the area will prevent this to a degree.
To max crystal growth chance create 2 rows of pearlstone leaving a gap of one block between, then remove every other block from each row to have a empty space around each block of pearlstone.
Pirate Map Farming
In order to farm the pirate map, simply make a small lava trap over the ocean, and stand in a puddle of water. It will take some time, but eventually the ocean enemies go up and get killed. This nets pirate maps which summons pirate invasions. Each invasion nets ~80 Gold - ~1.5 Platinum, and drops great hard-mode level gear.
Meteor Heads Farming
This only works in a pre-Hard Mode world. It is a fairly safe method to farm coins, as the meteor heads are very weak and can often be one shot with weapons at the end of pre-Hard Mode like Muramasa or Night's Edge.
Lucky Coin Farming
With the accessory Lucky Coin(obtained from a pirate invasion) equipped, each attack from you, your minion or your traps will have a chance of making monsters drop coins. This is one of the fastest way of making money especially with invasions or moon events. (This method doesn't work on statue-spawned monsters.)
Key Mold Farming
An great way to farm all biome's keys molds (as 1.3 key molds are turned into keys) is make a lava trap above you and spears and spiky balls traps under you in the biome you want the key mold. You can also make biomes (15*12) in the sea and then put water candles around you, then put spear traps below you so you can kill the Blood Jellies, Glowing Jellies, Etc. that spawn and have a chance of dropping the Key (1 in 2500) of the biome that you wanted.
Corruption Key Mold Farming
An effective way to farm the Corruption Key Mold can be to summon the Eater of Worlds in a Hardmode corruption biome as each section has a chance to drop the item.