Grown as an annual and preferred by cooks for its robust flavor, flat-leaved parsley adds a fresh, tantalizing note to omelets, stews, vegetables, and even soft cheeses and rice. The flat leaves are easy to chop. Parsley is one of the most used culinary herbs around the globe; it is also considered to aid digestion. Grow indoors for fresh parsley year-round. Parsley is a biennial grown as an annual because the best flavor comes from first year leaves. Leaves become bitter when flowers appear in the second year. Can be grown in ground or in containers.