Rot Garden: cost, levels and upgrades
Short answer
The Rot Garden grows biomass for binding and hunting, and timber for building, in one plot.
What it does
A Rot Garden makes biomass and timber every hour. Biomass feeds the Binding Pit and hunting parties; timber goes into every building and gate.
Its paths lean one way or the other: fungal beds for more biomass or a timber grove for more timber at level 3, and a seed vault or blight farm at level 5.
Levels and upgrade costs
| Level | Biomass per hour | Timber per hour | Upgrade to next | Time | Expansions needed | League |
|---|---|---|---|---|---|---|
| 1 | 12 | 15 | 35 scrap, 45 timber | 4 min | 0 | – |
| 2 | 16.2 | 20.3 | 65 scrap, 80 timber, 50 biomass | 40 min | 0 | – |
| 3 | 21.9 | 27.3 | 290 scrap, 365 timber, 230 biomass | 1 h 20 min | 2 | – |
| 4 | 29.5 | 36.9 | 1,310 scrap, 1,640 timber, 1,050 biomass | 2 h 40 min | 3 | – |
| 5 | 39.9 | 49.8 | 2,625 scrap, 3,280 timber, 2,100 biomass | 4 h | 3 | – |
| 6 | 53.8 | 67.3 | 5,250 scrap, 6,560 timber, 4,200 biomass | 6 h | 3 | Iron |
| 7 | 72.6 | 90.8 | 10,500 scrap, 13,120 timber, 8,400 biomass | 9 h | 3 | Steel |
| 8 | 98.1 | 123 | 20,995 scrap, 26,245 timber, 16,795 biomass | 13 h 30 min | 3 | Chrome |
| 9 | 132 | 166 | 41,990 scrap, 52,490 timber, 33,590 biomass | 20 h 15 min | 3 | Warlord |
| 10 | 179 | 223 | Max | – | 3 | Warlord |
Specialization paths
At levels 3 and 5 an upgrade asks you to pick one of two paths. The choice is permanent.
| Level | Specialization paths | Effect |
|---|---|---|
| 3 | Fungal Beds | 30 % more biomass. |
| 3 | Timber Grove | 50 % more timber. |
| 5 | Seed Vault | Stores 150 more of every material and 10 more serum. |
| 5 | Blight Farm | 40 % more biomass, but the rot draws hordes: extra noise. |
Tips
- If your horde is growing slowly, you're usually short on biomass before serum. A second Rot Garden fixes it.
- Pick Timber Grove if you're expanding and upgrading gates; pick Fungal Beds if you bind and hunt a lot.
- Blight Farm makes the most biomass but is loud. Pair it with a quiet village elsewhere.
Questions
How much does the Rot Garden cost in Voxhorde?
Building it costs 20 scrap, 25 timber and takes 2 min. The first upgrade, to level 2, costs 35 scrap, 45 timber and takes 4 min.
What is the Rot Garden's max level?
Level 10. Levels past 2 need island expansions: level 3 needs 2 and level 5 needs 3. Levels 6 to 10 also need a league reached at least once: Iron for 6, Steel for 7, Chrome for 8 and Warlord for 9 and 10.
Numbers come straight from the game's rules and update with every release.


