Forestry 4 is a modification for Minecraft that adds new cultivation and crafting items and techniques. It is designed to be compatible with BuildCraft and IndustrialCraft 2.

The latest versions of Forestry 4 make changes to the API that mods use to interface with it. This has resulted in several mods needing to be updated, either to exclusively support Forestry 4, or add support for both Forestry 3 and Forestry 4.