Medicine
In the old days you had a farm of herbs you could to help health with whatever sickness you were fighting. You would want to protect so you would put up fences and a scarecrow to ward off the birds and the farm animals of yours.
On the frontier if you were to get injured you wouldn't have any liquid medicine you had herbs. The herbs you had would heal the wounds you had and can create tea with them. The most herbs used were garlic, katnip, and mint. This is the medicine of the frontier.
Most people on the frontier had their own farms. They would put up fences and scarecrows to keep birds, their animals, and bugs away from their herbs so they wouldn't eat them. If you didn't have a farm you would have to have an item you could trade for the herbs you need. A doctor was on of the most important people in a town.
Back then people would sometimes used their herbs to create soap.