Crop seeds can be planted either 1) in your own, crop garden accessoried house or 2) in the community gardens (just type gardens in the map search function).
Herb seeds can be planted either 1) in your own, herb garden accessoried house (in the swamps) or 2) in the community HERB gardens (type herb gardens into the map search function).
Seasoned beans can be planted in free patches all over Ur, as well as in your own home, though bog homes with herb gardens only have dark patches for egg plant beans.