Remove purple hull peas from the shell and place them in a colander. Rinse them by running cold water over the peas while stirring gently with your hand. Examine them as you stir, removing any dark-colored or damaged peas. Place 1 lb. of the peas in a wire basket.
Bring a gallon of water to a boil in a large pot. Immerse the wire basket in the boiling water and boil for one to two minutes. Begin timing when the water returns to a boil.
Remove the peas from the boiling water and immediately run cold water over them. Cool the peas as quickly as possible to stop the cooking process.
Place the peas in plastic freezer containers or freezer bags. When using freezer containers, leave 1/2 inch of space between the top of the peas and the lip of the container.
Label the containers using freezer tape and an indelible marker. Include the date on the labels.