Overgrow
by Janexi
Overgrow is a Fabric world generation mod that lets blocks slowly transform into mossy and cracked variants over time, with Overgrow as the core system.
What it does
Overgrow adds a block transformation system in which blocks spread or change into other blocks after a period of time. Stone bricks can turn mossy or cracked, cobblestone can become mossy cobblestone, and dirt can change to mud when water is nearby. Mud, in turn, can revert to dirt, and moss blocks and moss carpet are included as part of the set. The mod also adds slabs, stairs and walls for mossy cobblestone and mossy stone bricks, along with infested mossy stone bricks.
The mod is built to be a foundation: the author describes the current release as early stage, with the basic transformation system in place and further changes to come later. Overgrow requires Cloth Config API and Fabric API, and Mod Menu is optional. It is server required and client optional, so servers must run it while players may leave it out. Files target 1.21.11 only, the latest being 0.3 on the alpha channel, and the code is released under the MIT License, though the project is not open source.
Key features
Timed block transformation
Blocks change into other blocks over time, with set chances such as mossy cobblestone and cracked stone bricks.
Water-driven mud
Dirt can change into mud when water is nearby, and mud can revert to dirt.
Mossy building blocks
Mossy cobblestone and mossy stone bricks come with slabs, stairs and walls for construction.
Infested stone bricks
Infested mossy stone bricks are included among the new block variants.
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Requirements
Dependencies declared by the latest file for each loader.
Required 2
Optional 1
How it compares
More Biome Coloured Blocks is a client-side only Fabric mod for 1.21 – 1.21.11, released under All rights reserved and not open source. Mossy Llamas is a client and server mod for 1.21.9 – 1.21.11, also under All rights reserved. Mossy Structures is server-side only and released under the MIT License, but it targets only 1.20.1.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Overgrow | Fabric | 1.21.11 | Server required, client optional | 2026-05-15 |
| More Biome Coloured Blocks | Fabric | 1.21 – 1.21.11 | Client-side only | 2025-12-30 |
| Mossy Llamas | Fabric | 1.21.9 – 1.21.11 | Client and server | 2026-01-08 |
| Mossy Structures | Fabric | 1.20.1 | Server-side only | 2025-11-24 |
Questions
Does Overgrow need Fabric API to run?
Does Overgrow have to be installed on the client?
Which game versions does Overgrow support?
In the catalog
Overgrow is one of 8,515 World generation mods on ModsFinder, and one of 4,027 World generation mods for Fabric. 19,862 mods support Minecraft 1.21.11.
More from Janexi
Similar mods
What the author says
A system where blocks slowly spread and transform over time. This mod is currently in a very early stage of development. Many planned features are not yet implemented, and the system is still being expanded and reworked.
Official listing
- Modrinth page
- modrinth.com/mod/overgrow
- Owner
- Janexi
- Published
- 2026-05-11
- Updated on Modrinth
- 2026-05-15
- Facts verified
- 2026-10-15