Dill is a tall fragrant herb with fine, feathery foliage. Foliage color can range from dark green to a blue-green. Dill is a full sun annual plant that does well in hardiness zones 3-9. It is an essential herb, a must-have for pickles, eggs, dressing, dips, garnish, bread and more. The seed is used as a spice. The Romans believed this herb was a symbol of good luck and also has many medicinal benefits.