Light. Full sun to partial shade.
Water. Water regularly while it establishes, and keep the soil moist but well drained. Established plants tolerate short dry spells.
Soil and feeding. Grows in sandy or rocky soil with an acid to neutral pH and tolerates poor soil. In a pot, use a well-drained mix such as Potting Soil.
Size. Grows to about 1–2 ft tall and 1.5–3 ft wide, forming an upright, bushy clump.
Pruning. Cut off spent flower stalks to keep new leaves coming; unpruned plants look weedy. Pick young leaves, which have the best flavor, for tea, soups and salads.
Problems to watch. Usually trouble-free. Watch for aphids and spider mites, which Insecticidal Soap controls, and for powdery mildew, leaf spot and gray mold.
Good to know. In Florida it is a perennial herb planted in fall or spring. It self-seeds and spreads by rhizomes, so a container keeps it in bounds. It is listed as non-toxic to cats, dogs and horses.
Sources: NC State Extension Plant Toolbox: Melissa officinalis · UF/IFAS Gardening Solutions: Herbs for Fall infographic
