Also known as Dƿeorgedosle · English Pennyroyal · European Pennyroyal
Safety note: This plant may be toxic to humans and pets. See toxicity details.
At-a-glance light, water, soil, and growing conditions from plant data
Full sun to partial shade for best growth.
80% intensity
Keep soil consistently moist, but avoid waterlogging.
70% intensity
Well-drained, moist, fertile soil (loamy or sandy loam).
50% intensity
Prefers moderate temperatures, protect from frost.
60% intensity
Outdoor
50% intensity
Light feeding, if needed, during growing season.
30% intensity
Safety information from plant toxicity data
| Attribute | Value |
|---|---|
| Toxic for humans | Yes 5/5 intensity |
| Toxic for pets | Yes 5/5 intensity |
| Edible | No |
Pennyroyal contains pulegone, a highly toxic compound, especially concentrated in its essential oil. Ingestion can cause severe liver damage, respiratory failure, and can be fatal to humans and animals.
Key traits and growing stats from plant data
Watering, pruning, propagation, and repotting details from plant data
Pennyroyal thrives in consistently moist soil, but it is crucial to avoid waterlogging, which can lead to root rot.
During warm growing seasons, check the soil moisture frequently and water when the top inch feels dry to the touch. Reduce watering in cooler months or during dormancy.
Container-grown plants may require more frequent watering than those in the ground due to faster soil drying.
Regular pruning is essential to maintain Pennyroyal's shape, encourage bushier growth, and prevent it from becoming leggy or overly invasive. Pinch back growing tips frequently during the spring and summer.
After flowering, cut back spent flower stalks to encourage new growth. A more substantial trim can be done in late autumn or early spring to rejuvenate the plant and manage its spread.
Pennyroyal is easily propagated through several methods. Stem cuttings taken in spring or early summer root readily in moist soil or water. Simply snip a non-flowering stem segment, remove lower leaves, and plant.
Division of established clumps in spring or autumn is also effective, separating rooted sections. Seeds can be sown directly outdoors after the last frost or started indoors.
Repotting Pennyroyal is typically needed every 1-2 years for container-grown plants, or when the plant becomes root-bound, indicated by roots growing out of drainage holes or stunted growth.
Choose a pot one size larger with good drainage. The best time for repotting is in early spring before new growth begins. Refresh the soil with a well-draining, fertile potting mix to provide new nutrients.
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Photos of Pennyroyal (Mentha pulegium)
Common names and botanical synonyms
Botanical classification
