Fertilizer in Arknights: Endfield takes the form of an item called Bumper-Rich, and it works differently than you might expect. Rather than speeding up plant growth, applying it to a planting plot doubles the harvest yield once crops fully mature. Getting a steady supply requires collecting Burdo-Muck from Burdenbeasts scattered around Wuling, then processing it at the Forge of the Sky.
Quick answer: Pat Burdenbeasts once per day to collect Burdo-Muck, then combine Burdo-Muck with Liquid Xiranite in the Forge of the Sky to craft Bumper-Rich fertilizer.
Where to find Burdenbeasts for Burdo-Muck
Burdenbeasts are large, docile creatures found in pastures around Wuling City. You can interact with each one once per day by patting it, which drops Burdo-Muck. Three separate herds exist in the region, and visiting all of them nets around 24 Burdo-Muck daily.
Herd locations:
- Southeast of Wuling City in a pasture area
- Northwest of the first herd, against a wall near three glow-locked chests and a pair of Auralynes
- South of the depot, at the bottom right corner of that building complex
The side quest "Burdenbeast Tales" from the NPC LiFeng introduces you to these creatures and leads you to the southeast herd. Completing it takes roughly five to ten minutes and serves as a good starting point for your daily fertilizer routine.
Crafting Bumper-Rich at the Forge of the Sky
Bumper-Rich requires two ingredients: Burdo-Muck and Liquid Xiranite. The crafting station you need is the Forge of the Sky, not the reactor or refining units. Simply place both materials into the forge, and the recipe unlocks automatically once you combine them for the first time.
No formal recipe unlock is required beforehand. The game registers the combination as a hidden recipe that becomes visible in your crafting menu after your first successful craft. If you purchased the lore page from the NPC shop at the front of Wuling City, that item hints at the combination but does not actually teach the recipe in a traditional sense.
One bag of Bumper-Rich can also be purchased from a specific shop vendor near the city entrance, which is how many players first discover the item exists.
Applying fertilizer to planting plots
Once you have Bumper-Rich in your inventory, apply it directly to any planting plot in Wuling before the crops finish growing. The fertilizer effect activates when the plants reach full maturity, doubling the yield from that harvest.
A common misconception is that fertilizer speeds up growth time. The countdown timer on your plots does not change after applying Bumper-Rich. The benefit is purely in the quantity of resources you collect at harvest.
With 24 Burdo-Muck collected daily from all three herds, you can produce enough Bumper-Rich to fertilize at least 20 high-yield crops per day, assuming you have sufficient Liquid Xiranite.
Managing Liquid Xiranite for fertilizer production
Liquid Xiranite is a processed resource that comes from the same Forge of the Sky used for fertilizer. Since you have limited machines capable of producing Xiranite, you may need to balance your production priorities between fertilizer and other crafting needs.
If you find yourself short on Liquid Xiranite, consider whether the doubled crop yield justifies diverting production from other recipes. For players focused on farming consumables like Ginseng Meat Stew or Fortifying Infusion, the extra plant yield can significantly accelerate ingredient collection.
Daily fertilizer routine
Step 1: Travel to each of the three Burdenbeast herd locations and pat every creature to collect Burdo-Muck. This resets daily.
Step 2: Return to your base and access the Forge of the Sky. Combine Burdo-Muck with Liquid Xiranite to produce Bumper-Rich.
Step 3: Apply Bumper-Rich to your active planting plots before harvest. The doubled yield takes effect when you collect the mature crops.
Building a zipline from your core base to the farming area can save travel time if you plan to make this a consistent part of your gameplay loop.
Fertilizer in Arknights: Endfield rewards players who invest in the daily routine of visiting Burdenbeasts and managing their Xiranite production. The yield boost compounds over time, making it especially valuable for anyone farming rare plants like Redjade Ginseng for endgame consumables.
