How are the gardens at 307 Old Post Road described in the novel, This Wicked Fate?

The garden is walled with a gate. The outer garden is filled with the typical herbs used for natural medicines, teas, and other products. There is an inner garden called the Poison Garden where the deadly plants grow. A room inside that area houses the plant called Absyrtus Heart until Bri successfully reunites the pieces of that plant. She notes that she has the room filled with dirt to eliminate the reminder of the number of people who have died guarding this plant.