The same place herbs have always come from. If you don't want to step outside of your city or visit the local farms/greenhouses, then import. You can also impor

The same place herbs have always come from. If you don't want to step outside of your city or visit the local farms/greenhouses, then import. You can also import seeds, but it's up to you to ensure the seeds are the right ones and they have the proper environment they need to grow, and then the right tools to actually process those herbs in the "traditional" ways (or in your own experimental ways I suppose). Herbs aren't magic you know, you've come across many if you've walked through any trail. Although I wouldn't blindly go picking anything and everything you see, some are toxic!