Yep, you can set fence posts without concrete, and there are some really good reasons for doing it that way. Some people believe that you should not set wooden posts in concrete, unless you want to replace rotting posts in a few years. Both the wood and the concrete expand and contract depending on the weather, and that can open up tiny spaces between the post and the concrete that allow water to get in and stay in. Water + wood equals rot.
Instead, try setting your wooden posts in a mixture of soil and gravel. Gravel provides a natural drain for water, and the soil and gravel work together as a strong anchor for your post. Keep reading to see how stress-free it is!