Information

Minecraft version:1.15.2
Forge version: 31.20
Environment: Singleplayer / Multiplayer

Mod name: Tree Harvester
Mod version: 1.3

My Mods Name:Colorful Biomes

How can I make my mods trees compatitable with tree harvester mod?

You just have to make sure to extend the LogBlock and LeavesBlock, just like the vanilla code. That's what my mod checks for. 1.16 changed the LogBlock to something else I believe but the idea is the same. Just look at how vanilla does it.

Thanks for the interest!