Grasp a bunch of parsley stalks together, holding them near the base. Remove no more than a third of the stalks and foliage at a single harvesting, because over-harvesting may prevent the plant from producing more leaves.
Cut through the bunched stalks at soil level with a sharp pair of shears. Make the cut as close to the base of the plant as possible.
Rinse the parsley in cool running water. Submerge the washed parsley in a bowl of water and store it in the refrigerator if you plan to use it within the next day.
Pat the washed parsley dry and remove the foliage from the stems if you prefer to dry it for later use. Spread the leaves out in a warm, dry area and allow them to dry for five to seven days or until they dehydrate completely.