The House Plant is a piece of Furniture. There are 15 different house plants, all of which can be purchased from the following:
Carpenter’s Shop for 250g.
Traveling Cart 250g-2,500g.
Furniture Catalogue for free.
If you choose the wilderness map when you begin the game, you will start with house plant #8 in your house. If you choose the standard map, you will start with house plant #1 in your house.