Pennyroyal Plant Care
Minthostachys diffusa Epling
Updated · Sources · How we source care data
This plant's small, delicate leaves give off a strong minty fragrance when crushed. Native to the Andes mountains of South America, Minthostachys diffusa is sought after by plant collectors for its aromatic properties and ability to attract pollinators with its pale purple flowers.
Full sun to partial shade
At a glance
How do you care for Pennyroyal?
Pennyroyal grows best in full sun to partial shade.
What Is the Pennyroyal?
Pennyroyal (Minthostachys diffusa) belongs to the Lamiaceae family within the Minthostachys genus.
Pennyroyal displays a low-growing, spreading perennial growth habit, reaching up to tall with a spread of approximately . Pennyroyal produces small, tubular flowers in shades of purple or white.
What Light Does the Pennyroyal Need?
Pennyroyal thrives in full sun to partial shade.
Light Requirement
Full sun to partial shade
What Soil Mix Works Best for a Pennyroyal?
Well-draining soil mix with high organic content. Good drainage is essential for Pennyroyal to prevent waterlogging, which leads to root rot and fungal issues.
How Do You Repot a Pennyroyal?
Repot every 1-2 years in early spring. 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 Pennyroyal?
Pennyroyal can be propagated through seeds, stem cuttings. Similar propagation techniques also apply to andean mint plant care, which shares the same genus.
Is the Pennyroyal Toxic to Pets and Children?
Pet safety not verified
The ASPCA does not list Pennyroyal, so we can't confirm whether it is safe for cats and dogs. Keep pets from chewing it as a precaution.
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 Pennyroyal?
Pennyroyal is susceptible to aphids, spider mites. 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
Pennyroyal 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 Minthostachys genus — compare its care with other Minthostachys species on PlantoScan.
Minthostachys is part of the Lamiaceae plant family — browse all Lamiaceae genera and species.
Pennyroyal thrives in bright light and direct sun — see other bright-light plants.
Related Plant Care Guides
Closely related plants with similar care requirements:
Sources
- Scientific name & taxonomy: Minthostachys diffusa Epling, family Lamiaceae (first published in Repert. Spec. Nov. Regni Veg. Beih. 85: 167 (1936)) — World Flora Online record, IPNI name record.
- Pet toxicity: Pet safety not verified: the ASPCA does not list Pennyroyal, so we can't confirm whether it is safe for cats and dogs. 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 — values that fail them are hidden. How we source and check plant data.
Spotted a mistake? Email info@upvision.media with the page link — we check and correct reported errors.
Identify Plants Like the
Pennyroyal Instantly
Scan any plant with your phone camera and get instant ID, care tips, water and fertilizer reminders, and health checks — all in one app.
Free
to download
iOS & Android
platforms
Light & dark
mode
100,000+
species