Spearmint

What is spearmint?

Spearmint (Mentha spicata) is an aromatic herb belonging to the mint family (Lamiaceae). Native to Europe and Asia, this perennial plant is characterized by square stems, oppositely arranged leaves, and tapering spikes of lilac, pink, or white flowers. It spreads aggressively through creeping stolons.¹²

Widely cultivated for culinary and commercial use, spearmint is a popular flavoring for sweets, beverages, salads, and various savory dishes. Its essential oil—which contains carvone as its primary component—is frequently used to flavor toothpaste, candies, jellies, and liqueurs. Beyond its culinary applications, the plant is valued for its distinct fragrance and has been naturalized in many regions, including North America and parts of Africa.¹²³

How does peppermint differ from spearmint?

While both spearmint and peppermint belong to the same genus (Mentha), they differ significantly in their botanical origins, physical characteristics, and chemical compositions.

Botanical and Physical Differences

• Origin: Spearmint (Mentha spicata) is a distinct species, whereas peppermint (Mentha ×piperita) is a hybrid resulting from the cross-breeding of spearmint and water mint.²¹
• Leaves: Spearmint features stalkless leaves, while peppermint has distinctively stalked leaves.²¹
• Flowers: Spearmint produces tapering, lax spikes of lilac, pink, or white flowers. In contrast, peppermint displays dense, blunt oblong clusters of reddish-lilac or pinkish-lavender flowers.³²¹

Chemical and Sensory Differences

• Flavor and Aroma: Peppermint is known for a strong, sweetish odor and a pungent taste that leaves a cooling aftertaste, largely due to its high menthol content. Spearmint has a characteristic mint fragrance but lacks the intense cooling sensation of peppermint, as its primary chemical component is carvone rather than menthol.¹³²

What are some other plants in the Lamiaceae family?

The Lamiaceae family, commonly known as the mint family, is a diverse group of flowering plants characterized by their square stems, opposite leaves, and aromatic properties. Beyond the well-known mints, the family includes many economically important culinary herbs, ornamentals, and medicinal plants.⁶⁷⁸

Some notable members of the Lamiaceae family include:

• Culinary Herbs: Basil, oregano, marjoram, rosemary, sage, thyme, and savory.⁶⁹
• Ornamentals: Lavender, bee balm (bergamot), coleus, lamb’s ears, and bells of Ireland.⁶⁸⁹
• Medicinal and Other Uses: Catnip, lemon balm, horehound, hyssop, patchouli, and chia.⁶⁹
• Timber Plants: Certain species formerly placed in the Verbenaceae family, such as teak, are now classified within Lamiaceae.⁸

How do mint plants spread in a garden?

Sorry, the Britannica knowledge base does not contain information regarding the specific mechanisms by which mint plants spread in a garden.