It seems with a lot of mods this mod adds way too many collision layers. It's adding 83 collision-layer prototypes to my game which is more than the hard-coded engine limit of 55. I'd be happy to provide my log file if it helps. But for now I'll have to play without, which is sad because I quite like the concept of this mod.

I understand, so this mod requires making a collision layer for each plantable tree type. Without the collision layers, there is not way to get the Cultivators to be locked to the appropriate tiles/biomes etc. Or at least that was the only solution I could find. I will return to investigate if I can figure out another solution (as I am much more familiar overall with factorio modding now) however, unfortunately I doubt that this issue can be fixed.

Thanks for the quick response. I understand if it's impossible to fix. My use case is pretty unique since I'm playing with a lot of random mods I found on the mod portal. Thanks again, and a (late) Merry Christmas to you.