Motherwort

Leonurus cardiaca

herb

Motherwort (Leonurus cardiaca) is a tall, hardy, somewhat rangy mint-family perennial with distinctive deeply lobed, almost palm-like lower leaves and tiered whorls of small pink flowers wrapped in spiny calyxes up the square stems. Reaching 3 to 5 ft, it is an old cottage-garden plant - its very name, and the species epithet cardiaca, reflect a long folk tradition, and it is harvested as the flowering tops. It is extremely tough, drought-tolerant once established, and self-seeds enthusiastically, so it is best sited where it can naturalize. Bees work the flowers, though the prickly seed heads can catch on clothing.

✅ Plant alongside

Good neighbors that attract beneficial insects or deter pests

• Lemon Balm — A fellow easygoing mint-family herb that enjoys the same sunny, average conditions
• Yarrow — A tough, drought-hardy companion that draws beneficial insects to the bed
• Catnip — Another vigorous mint relative that pairs in a low-care, pollinator-friendly herb planting

🛡️ Pest & disease prevention

Proactive ways to stop trouble before it starts — tap a name with an arrow for its full guide

• Aphids →

  Hose colonies from the flowering stems; rarely a serious problem on this robust herb

• Spider mites →

  Appear on drought-stressed plants - they are uncommon and easily rinsed off

🌾 Harvest & storage

Harvest the upper flowering tops and leaves just as the plant comes into full bloom in early summer, cutting the top third of the stems; wear gloves and long sleeves, as the spiny flower calyxes can prickle. Dry the cut tops in a shaded, airy place for tea and tincture. Cutting in bloom also helps prevent the heavy self-seeding. The flavor is notably bitter, so it is used as a measured herb rather than a culinary green.

🥗 Nutrition & benefits

Motherwort is a bitter herb grown for traditional use rather than eating, the dried flowering tops steeped into a tea or made into a tincture in the long folk tradition its name reflects. In the garden it is a tough, pollinator-friendly perennial for a wild or herb corner, asking almost nothing and returning year after year.

⚠️ Toxicity & safety

Motherwort is a traditional medicinal herb, not a culinary green. It is a uterine stimulant and is contraindicated during pregnancy and breastfeeding; it may also add to the effect of sedative, blood-thinning, or heart medications, and handling the prickly, hairy flower heads can irritate sensitive skin. Use it only in measured amounts and consult a professional before any medicinal use.