There was at one point a small addon that just added some crops that provided items that would normally be dropped by mobs (both passive and hostile), until those crops were migrated into GregTech. However, both GT5u and GT6 are pretty much only available for MC 1.7.10, and GTCE has detached from IC2, so I'm fairly sure it doesn't include those crops. It would be nice to have them available for newer versions of Minecraft, whether as part of IC2 or as an addon.
