Although peas grow most prolifically in the soil, gardeners who lack space for an extensive garden can successfully grow peas in containers instead. Because peas develop a shallow root system, a container for peas can be wide and shallow to accommodate the developing pea plants. Plant peas in pots and then provide regular moisture and regular fertilizer while the pea plants develop. You will soon have peas to harvest from your container-grown pea plants.
Fill the planting container to the top with potting soil.
Place the peas on the top of the potting soil, spacing them approximately 4 inches apart. Cover the pea seeds with 1 inch of additional potting soil.
Insert the stakes at each corner of the container, approximately 5 inches into the potting soil.
Tie a length of twine to one stake, positioning the twine knot just above the rim of the container. Pull the twine around to the next stake and wrap it around the stake once. Stretch the twine around the entire perimeter of the container, wrapping it around each stake, to return to the starting point. Tie the twine off on the same stake.
Make horizontal lengths of twine around the stakes, by repeating the process, until you reach the tops of the stakes. Space each length of twine approximately 6 inches apart along the height of the stakes. This will create a support structure for the peas to climb.
Water the newly planted peas generously and place the container in a location that receives full sunlight. Keep the soil evenly moist by watering when the top 3 inches of potting soil feels dry to your finger.
Mix the fertilizer with water according to package instructions and fertilize the peas for the first time when they reach approximately 6 inches in height. Fertilize the peas again when they begin to blossom.
Harvest peas when the pea pods swell with peas inside. Pick peas earlier rather than later for the best taste. To pick the peas, pinch each pod off the vine with your thumb and index finger.