Players diving into Subnautica 2 are discovering one hard truth fast: burn through your finite ore supply before building a metal farm, and you may not be able to recover. The metal farm is the one structure in the game that converts a single piece of raw ore into three, making it the backbone of any sustainable base. Miss it, and a softlock becomes a real possibility.
Why the metal farm matters more than almost anything else
Resources like troilite and axum bacterial cultures are scarce and do not appear to respawn in the current build of the game. That makes them effectively one-time pickups unless you have a metal farm running. Spend those materials on the wrong crafts early, and you lock yourself out of the farm permanently. The stakes are unusually high for what looks, on the surface, like a standard base structure.
Here's the thing: most players won't realize the danger until it's too late. The game doesn't warn you.
Scanning the blueprint at the yellow metal fields
Unlocking the metal farm blueprint requires scanning 3 metal farm remains, all located in the same area: the yellow metal fields east of the Alien Ruins and Angel Comb. Getting there takes some preparation. Players should have the first depth module equipped on their tadpole submarine before attempting the trip, and bringing a sonic resonator is strongly recommended to collect resources while in the area.
The route starts at the Alien Ruins, then travels 520 meters east to the Angel Comb, a plant with large purple roots sitting beneath a massive alien structure. From there, a chasm to the northeast leads directly to the yellow metal fields. One important note: a leviathan (a giant squid-type creature) patrols this area. Checking for it before proceeding is worth the extra few seconds.
Removing ore from the metal farm's inventory mid-cycle resets all progress. Always use the sonic resonator to break and collect the grown metal stave before touching the inventory.
What goes into crafting the farm
Once the blueprint is scanned, the crafting recipe calls for 1 axum bacterial culture, 1 mangalloy ingot, and the mangalloy ingot itself requires 1 titanium, 1 troilite, and 1 atacamite. The axum bacterial culture grows directly on the yellow metal fields between the old farm remains. Troilite, the rare green ore, has only 7 known deposits in that same area. Atacamite spawns close to the Alien Ruins.
Building multiple farms at once is possible if you collect enough materials on your first visit. Given how limited troilite is, that first trip should be treated as a full resource run.
Powering it and putting it to work
The metal farm is placed through the habitat builder under the cultivation menu and needs a connected power source to operate. The most efficient setup is placing it near a hydroelectric turbine positioned in a current. For farms built further from a turbine, power transmitters bridge the gap.
Once powered and loaded with raw ore, a timer runs and the farm grows a metal stave on top. Use the sonic resonator to collect it, and you get 3 pieces of that ore in return. Farming speeds vary significantly by material: titanium, quartz, copper, and salt cycle in 2 minutes, while lead, silver, sulfur, gold, conduit crystal, celestine, and creature enamel take 10 minutes, and atacamite and troilite take a full 20 minutes per cycle.
For players who want to stretch their ore supply across other material types, our guides on finding silver and best farming spots and locating lead deposits cover the pre-farm sourcing side of the equation in detail.
The metal farm is one of those systems that rewards players who plan ahead and punishes those who don't. Get it built early, keep it powered, and the rest of Subnautica 2's resource economy opens up considerably. For more on navigating the deep, check out the full Subnautica 2 guide collection covering everything from titanium ingots to base building.
