u003cmeta charset=u0022utf-8u0022/u003ePeas have shallow, delicate roots, and the plants can grow pretty large. So first, select a wide container at least 8 inches deep with good drainage. Then, be sure to provide a support system, such as a trellis, so you can tie up the plants as they get tall and heavy. Peas don't like to be transplanted, so plant your seeds in large pots where they can grow to full size.