Slime Fern
by biggsmcb
Slime Fern is a plant mod that lets players collect slimeballs from a renewable source, without hunting slimes.
What it does
Slime Fern adds a new plant that generates in the world and produces slimeballs. Breaking the fern drops a slimeball, so players gain the item without mobs. The plant grows infrequently in swamps and more often in lush caves, and it can also appear in slime chunks further down.
Shears used on the fern drop the plant itself, so a patch can be moved or replanted. Bone meal applied to a Slime Fern yields a slimeball roughly one time in five, and the fern itself stays on the ground, so the plant can be harvested again and again. Walking through a Slime Fern moves the player slightly slower.
The mod is published for Forge and NeoForge, with files for 1.20.1 and 1.21.1. It runs on client and server, so both the server and every player need it, and it is released under the MIT License, though the project is not open source.
Key features
Slimeballs from a plant
Breaking Slime Fern drops a slimeball, providing an alternative renewable source to mob drops.
Shears harvesting
Right-clicking the fern with shears drops the Slime Fern itself, so patches can be collected and placed elsewhere.
Bone meal yield
Bone meal gives a 20% chance of a slimeball and leaves the fern standing.
Movement slowdown
Players move slightly slower while passing through Slime Fern.
Gallery
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Use cases
Renewable slimeball supply
Players who need slimeballs for sticky pistons, slime blocks or other crafts can gather them from ferns instead of hunting slimes.
Swamp and cave exploration
Ferns grow more often in lush caves and less often in swamps, so players can plan where to look for them.
How it compares
Slime Fern is a Forge and NeoForge mod for 1.20.1 and 1.21.1 that runs on client and server. ThrowableSlimeball is a Forge and NeoForge mod for 1.16.5 – 1.21.1 that also runs on client and server, but it uses a custom license and is not open source. Growing Grass is NeoForge only for 1.21.1 – 26.2, is server-side only and is open source under the MIT License.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Slime Fern | Forge and NeoForge | 1.20.1 – 1.21.1 | Client and server | 2026-07-28 |
| ThrowableSlimeball | Forge and NeoForge | 1.16.5 – 1.21.1 | Client and server | 2026-07-27 |
| Growing Grass | NeoForge | 1.21.1 – 26.2 | Server-side only | 2026-07-21 |
Questions
Does Slime Fern need to be installed on the server?
Which loaders does Slime Fern support?
Does Slime Fern produce slimeballs without mobs?
In the catalog
Slime Fern is one of 8,515 World generation mods on ModsFinder, and one of 5,058 World generation mods for Forge. 32,366 mods support Minecraft 1.21.1.
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What the author says
This mod adds a new plant called the Slime Fern as an alternative and renewable source of Slimeballs without needing to hunt down a Slime chunk. The Slime Fern grows infrequently in Swamps in ones and twos, and more frequently in Lush Caves in small patches. Breaking a Slime Fern will produce a Slimeball…
Official listing
- Modrinth page
- modrinth.com/mod/slime-fern
- Owner
- biggsmcb
- Published
- 2026-07-28
- Updated on Modrinth
- 2026-07-28
- Facts verified
- 2026-10-15