As the title explains, I don't see any bear traps nor any fertilizers options to choose from the Bait Shop window.
See below the bold part:
Supplies including Weed Seeds can be purchased from Drug Dealer NPCs which appear around the city. Look out for the āDā icon on the radar/map. You can also purchase Fertilizer and Bear Traps from Dealers/Bait Shops. Water/Fertilizer will increase the growth rate of plants, and Bear Traps will protect them from thieves and the cops.