Board Thread:Resolved Mod Technical Support/@comment-25479288-20170127181307/@comment-27219153-20170127184405

A list of LOTR biome ids can be found on the regions page. However LOTR biomes use different ids than Vanilla biomes (and most other mods). If the Growthcraft devs were to include the LOTR biome system, then it would work, but some mods are just incompatible with LOTR. My best advice for you is to just go to the overworld to get beehives.