Farming, Kingdom Building, and/or Cooking Manga (and adjacents)

Kingdom Building (slightly)

Farming and Kingdom Building
He makes lots of friends along the way. Reminds me a lot of a better Spirit Farmer

Cooking and the soldiers have to make their own territory since they're cut off from the rest of civilization so some Kingdom Building

Cooking and she's an earth magician who can make plants grow

Cooking (He cooks for ghosts)

Cooking and a pet