Mentha x piperita
These Mediterranean natives spread rapidly by underground stems and can be quite invasive; to keep them in bounds, grow them in pots or boxes. Tough and unfussy, they grow almost anywhere but perform best with light, moist, medium-rich soil, regular water; and full sun or partial shade. Plants disappear in winter in colder part of range. Replant about every 3 years; propagate from runners.Mentha x piperita
This hybrid grows to 3 ft. tall. Strongly scented, tooth-edged leaves to 3 in. long are dark green often tinged with purple. Small purplish flowers appear in 1–3-in. spikes. Leaves are good for flavoring tea.
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