Peas grow great inour Georgia clay; when the rocks are removed. Since this frame trellis can bear a lot of weight (I should know) and tall, I planted more seeds than necessary. There is a row on the outer facing side and one on the inner, two peas per hole, and 36 plants total.
With lots of Spring showers I don't only get May flowers; but, early and healthy peas.
It is ture, clay is the perfect medium for peas. Clay is rich in nutrients and cooler than other soils.
This is a pead pod from last year. The pea plant was grown in a pot of plain potting soil; hopefully, this year's larger crop, in clay, will yield darker pods with more peas.