United States Edition

Pennyroyal  

Mentha pulegium

Pennyroyal is a member of the Mentha family. Its botanical name is Mentha pulegium.

  • Excellent ground-cover and can happily be walked on; it releases a fragrant scent when walked on
  • Good container plant – will hang over the sides
  • Flowers and leaves can be dried for potpourri
  • Effective insecticide
  • Rub fresh pennyroyal onto dogs’ coats to repel fleas (hence its name, “Fleabane”)
Blooms normally display as a colour very similar to   Lilac. Pennyroyal is a flowering herb perennial, it will last at least up to several years in its native climate. Normally grows with a ground-cover habit. This plant tends to bloom in mid summer.

Pennyroyal is normally quite a low maintenance plant and is normally very easy to grow - great for beginner gardeners!

This plant info is provided by the myfolia gardener's wiki. All details about Pennyroyal have been kindly provided by our members.

How to grow Pennyroyal

  • Full Sun

    OR +
  • Partial Sun

    +
  • High

  • Propagates easily from cuttings.
  • Dig compost into the bed around pennyroyal each season
  • Water well twice-weekly
  • Rooted cuttings can be started in spring to replace/fill in where older plants have died back

Growing Pennyroyal from seed

Transplanting Pennyroyal

Harvesting Pennyroyal

  • Effective insecticide – ant, flea and mosquito repellent
    • Sprinkle dried, powdered pennyroyal around ants’ nests
    • Rub fresh pennyroyal onto arms and face to repel mosquitoes
    • Rub fresh pennyroyal onto dogs’ coats to repel fleas (hence its name, “Fleabane”)

Companion plants for Pennyroyal

These plants have been known to grow well alongside Pennyroyal so consider planting:

Keep flea beetles off of eggplant by planting pennyroyal under the plants. It may be of use as a companion plant to other pest-prone crops.1

Repellent plants for Pennyroyal

These plants will not grow well with Pennyroyal so avoid planting these within close proximity:

Common Pennyroyal problems

These problems, diseases and pests are known to affect Pennyroyal plants:

Pennyroyal Folklore & Trivia

  • Pennyroyal flowers in a bouquet means “flee away”

Other names for Pennyroyal

Dwarf pennyroyal, Fleabane

Pennyroyal care instructions

How long does Pennyroyal take to grow?

These estimates for how long Pennyroyal takes to sprout, grow and harvest are from real observations from real gardeners, right around the world. Start logging and journaling your observations to participate!

Footnotes

fn1: Mother Earth News

Pennyroyal Forums

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