I do plan on picking up Seasons of Harvest at some point, won't get to that area of the game soon though. My suggestion was more something that I think would compliment that set greatly-- a dedicated tileset just containing a variety of crop types (fruits, vegetables, flowers, etc.). It'd be similar in design to this set in the sense that it isn't an area itself but rather an enhancer, a bunch of tiles meant to be used with something like Seasons of Harvest.
For my purposes, I have a hub area where I plan to have a variety of plants that can be grown by the player, but I'm sure this type of set would be useful for anyone planning a farming sim type of game, or just used as flavour for their towns and villages!