This mod started as a Forge 1.20.1 fork of the original Placeable Plants by BisUmTo, since the original project only supports Forge 1.19.2, but then grew into an expanded version of it.

📖 About 📖

This fork expands the original idea to work with nearly all plant-type blocks, including modded ones, instead of only a smaller selective set. And as a side effect, it also allows plants to generate during worldgen on many non-soil blocks, which can make the world look surprisingly overgrown, detailed, and interesting.

The original mod already had a really nice simple concept: let vegetation be placed on far more block surfaces than vanilla normally allows. That opens up a lot of extra freedom for builders who want to add more detail and decoration to their builds.

As the original author also pointed out, the idea makes intuitive sense too - in real life, many plants do manage to grow out of tiny cracks in stone and other unexpected places.

Main differences from the original:

Works much more broadly for plant-type blocks across the board
Supports both vanilla and modded plants
Excludes farm-dependent crops/plants that require farmland
Excludes tree saplings, which keep their normal vanilla-style placement rules
Also affects world generation, allowing plants to appear on many non-soil surfaces
Includes configurable placement & worldgen blacklists for controlling which blocks plants can use

Worldgen side effects:

One side effect of this broader behavior is that plant placement rules can also influence natural generation in interesting ways. You can now sometimes find vegetation generating in places where vanilla normally would not allow it, such as:

rocky patches
ravines
beaches
deserts
icy ocean / lake floors
cliffs and mountains
structures
other unusual surfaces, depending on your config

This was originally a completely accidental side effect, but it turned out to look surprisingly good in practice and gives the world a much more overgrown, detailed, and natural-looking feel.

This effect can look especially nice alongside mods that expand foliage and natural environmental detail, such as Project: Vibrant Journeys, [Let's Do] BloomingNature, Geophilic,...

Config

The mod includes a "placeable-common.toml" config file inside the "config" folder.

"placement_blacklist"
- Blocks or block tags that plants cannot be placed on at all.
- This affects both manual placement and world generation.
- Empty by default.
"worldgen_blacklist"
- Blocks or block tags that plants cannot generate on during world generation.
- This only affects world generation, not manual player placement.
- Includes `#minecraft:leaves` by default, so plants shouldn't generate on top of leaf blocks.

Credits

This is an unofficial Forge 1.20.1 / NeoForge 1.21.1 fork/expansion of Placeable Plants by BisUmTo.
Full credit for the original concept and original mod goes to the original author.
For Fabric versions, please check out the original mod.

Placeable Plants: Expanded