Folks in Pogue's entry didn't always have it, but there were a number of cheap substitutes, such as hard Peas or horse beans.
"My Lady of the Chimney Corner"
Alexander Irvine
These sweet-Peas-now I've fixed the trellis for them to climb upon, I resent it because they don't take hold right now.
"Lonesome Land"
B. M. Bower
Well, run into the garden and pick all the Peas you can find.
"Girls of the Forest"
L. T. Meade