Organic farms that welcome day visitors or short stays for learning?

Some organic and permaculture farms offer day visits, tours, or short stays with opportunities to learn and participate. These are usually small-scale and educational rather than commercial tourism operations. The best experiences combine hands-on involvement with learning about methods and philosophy. They're often found through eco-networks or word of mouth rather than mainstream booking platforms. Some combine accommodation with learning opportunities. These tend to be more meaningful and less polished than standard tourist experiences.