Horse Mint Plant Care

Mentha longifolia (L.) L.

Updated ยท Sources ยท How we source care data

Mentha longifolia, also known as horse mint, brookmint, fillymint or St. John's horsemint, is a species of plant in the family Lamiaceae.

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Full sun to partial shade

At a glance

How do you care for Horse Mint?

Horse Mint grows best in full sun to partial shade. It is reported as toxic to pets, so keep it out of reach of pets.

Where Is the Horse Mint Native To?

Native range77 countries

What Is the Horse Mint?

Horse Mint (Mentha longifolia) belongs to the Lamiaceae family within the Mentha genus. Horse Mint is native to Europe excluding Britain and Ireland, western and central Asia, and northern and southern Africa. Horse Mint is also known as Donkey's Tail, Mentha.

Horse Mint displays a spreading, mat-forming herb growth habit, reaching up to tall with a spread of approximately . Horse Mint produces small, lilac to white flowers in terminal spikes.

What Light Does the Horse Mint Need?

Horse Mint thrives in full sun to partial shade.

Light Requirement

Full sun to partial shade

What Soil Mix Works Best for a Horse Mint?

Well-draining, fertile soil with a neutral pH. Good drainage is essential for Horse Mint to prevent waterlogging, which leads to root rot and fungal issues.

How Do You Repot a Horse Mint?

Divide and repot every 2-3 years. Choose a pot one size larger than the current container, and ensure it has drainage holes to allow excess water to escape.

How Do You Propagate a Horse Mint?

Horse Mint can be propagated through division, stem cuttings, seeds. Similar propagation techniques also apply to spearmint plant care, which shares the same genus.

Is the Horse Mint Toxic to Pets and Children?

Toxic (caution)

Reported as toxic in our plant data. Not verified by the ASPCA.

This is a general caution, not veterinary or medical advice. If your pet ate a plant, contact your vet or animal poison control.

See all plants toxic to cats and plants toxic to dogs.

What Pests and Diseases Affect the Horse Mint?

Horse Mint is susceptible to aphids, spider mites, mint rust. Inspect the foliage regularly, especially along leaf undersides and stems. Treat infestations promptly with insecticidal soap or neem oil to prevent spread.

Yellow leaves, brown tips or drooping? See common plant problems and how to fix them.

Keep exploring plants

Horse Mint is one of many species covered in the complete plant care and identification guide, which groups plants by genus, attribute, and popularity.

It belongs to the Mentha genus โ€” compare its care with other Mentha species on PlantoScan.

Mentha is part of the Lamiaceae plant family โ€” browse all Lamiaceae genera and species.

Horse Mint thrives in bright light and direct sun โ€” see other bright-light plants.

More Mentha Species

Other Mentha species in PlantoScan's care catalogue share similar watering, light, and soil preferences:

Sources

  • Scientific name & taxonomy: Mentha longifolia (L.) L., family Lamiaceae (first published in Fl. Monsp. 19 1756) โ€” World Flora Online record.
  • Pet toxicity: Horse Mint is reported as toxic to pets in our plant data (not verified by the ASPCA), so treat it with caution. Checked against the ASPCA plant list; any other toxicity note on this page comes from PlantoScan's plant database.
  • Care values(watering, light, temperature, humidity, soil, fertilizing): PlantoScan's plant database, filtered by automatic plausibility checks โ€” values that fail them are hidden. How we source and check plant data.

Spotted a mistake? Email info@upvision.media with the page link โ€” we check and correct reported errors.

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