How to build Growth Chamber Arknights Endfield (Empty Cabin M)

What to know

• The Growth Chamber is a cultivation facility installed on OMV Dijiang
• It turns one rare plant or ore into a reusable seed
• Requires story progression and Control Nexus upgrades
• Operator assignment directly affects output speed and efficiency

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The Growth Chamber (Empty Cabin M) is one of the most important long-term progression facilities in Arknights Endfield. It allows you to reproduce rare growth materials and certain rare ores that are otherwise time-gated or slow to obtain through exploration. Once built and properly staffed, it becomes a passive supply engine that supports promotions, tuning, and advanced crafting.

Below is a complete, up-to-date breakdown covering how to unlock it, how to build it, how it works internally, and how to use it efficiently.

Arknights Endfield Growth Chamber (Empty Cabin M) details

Category	Details
Facility type	Cultivation / duplication
Installation size	Empty Cabin M
Location	OMV Dijiang
Input	Rare plant or rare ore (1 unit)
Output	Reproduced material over time
Required staff	Minimum 1 Operator
Scaling	Faster output with more/better Operators

What the Growth Chamber actually does

The Growth Chamber is not a normal crafting station. Instead of consuming recipes, it works on a seed-based system.

You first sacrifice one unit of a rare material to create a seed. That seed is then stored by the Growth Chamber and used to grow new copies of the same material repeatedly over time. Once seeded, you never need to re-farm that material manually unless you want to seed additional types.

This makes the Growth Chamber especially valuable for:

• Rare growth plants used in Operator promotion
• Rare ores needed for tuning and high-tier modules
• Materials with long field respawn timers

How to unlock the Growth Chamber on OMV Dijiang in Arknights Endfield

Progression requirements you must meet

Before the Growth Chamber appears as a buildable option, several systems must already be unlocked through story progression:

• Access to the AIC base management system
• Full control of the OMV Dijiang mobile base
• Availability of expandable cabin slots

These unlock naturally by progressing through the early main chapters. You do not need to complete side content to access this facility.

How to upgrade Control Nexus in Arknights Endfield

The Control Nexus governs which cabins and facilities can be installed on OMV Dijiang.

Each upgrade level expands:

• Maximum facility capacity
• Cabin size availability
• Advanced production and cultivation modules

The Growth Chamber specifically requires access to Medium-sized empty cabins, which only become available after upgrading the Control Nexus beyond its initial levels.

If you cannot see the Growth Chamber in your build list, your Control Nexus level is the bottleneck.

How to install the Growth Chamber (Empty Cabin M)

Step 1: Open the OMV Dijiang facility interface

From the base management screen, switch to OMV Dijiang and enter the cabin layout view.

Step 2: Locate an Empty Cabin M slot

The Growth Chamber can only be placed in a Medium empty cabin. Small cabins will not work.

If you do not have a free Empty Cabin M:

• Remove or relocate an existing facility
• Expand the ship layout via Control Nexus upgrades

Step 3: Select and place the Growth Chamber

Choose the Growth Chamber from the facility list and install it in the selected Empty Cabin M slot. Placement is instant once unlocked.

How to activate the Growth Chamber with Operators

A Growth Chamber does nothing until staffed.

Operator assignment rules

• Minimum: 1 Operator
• Maximum: depends on cabin and upgrades
• More Operators = faster growth cycles

Operators with base-oriented traits or productivity bonuses will noticeably reduce cultivation time.

How to use the Growth Chamber step by step

Obtain the material manually

You must first acquire one unit of the rare plant or ore in the field. The Growth Chamber cannot generate materials you have never obtained.

Convert the material into a seed

Interact with the Growth Chamber and choose the conversion option. This consumes the material and creates a permanent seed entry for that item.

Start cultivation

Once seeded, the Growth Chamber automatically begins growing new copies of the material over time.

Collect output

When a growth cycle completes, the material is added directly to your inventory or depot depending on your base settings.

Location considerations for first-time seeding

The initial copy of each rare material must come from exploration. These typically appear in:

• High-risk biomes
• Resource-dense side zones
• Limited-respawn harvest nodes

Once seeded, however, you no longer need to revisit these locations unless you want to seed additional materials.

Growth Chamber efficiency tips

• Seed your rarest materials first, not common plants
• Assign Operators with base productivity bonuses
• Check output regularly to avoid idle time
• Pair the Growth Chamber with storage upgrades to prevent overflow

The Growth Chamber is most efficient when treated as a long-term investment rather than a short-term farming tool.

Common mistakes to avoid

• Trying to seed a material you have never collected
• Installing the chamber in the wrong cabin size
• Leaving it unstaffed and wondering why nothing grows
• Using it on materials that are already abundant in the field

Growth chamber and seed production

As Operator promotion costs rise and tuning demands increase, manual farming becomes inefficient. The Growth Chamber shifts rare material acquisition from active grinding to passive production, freeing you to focus on combat, exploration, and base optimization.

It is one of the few systems in the game that permanently reduces resource friction once fully set up.

If you plan to progress seriously in Arknights: Endfield, the Growth Chamber (Empty Cabin M) is not optional—it is foundational. Unlock it as soon as your Control Nexus allows, seed your rarest materials early, and let time do the work for you.

Once running, it quietly becomes one of the most valuable facilities on OMV Dijiang.

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