Skullcap
Scutellaria lateriflora
Skullcap is a slender North American mint-family herb valued in traditional herbalism as a nervine for calming tension. It takes its name from the small helmet- or skull-cap-shaped appendage on its tiny blue flowers.
- Light
- Full sun to part shade
- Water
- Consistent moisture; likes damp soil
- Difficulty
- Moderate
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Overview
Skullcap (Scutellaria lateriflora) is a perennial herb in the mint family (Lamiaceae) native to North America. The common name refers to the distinctive cap-like protrusion on the calyx of each small flower, which resembles a medieval helmet.
It has a long history of use among Indigenous peoples and later Western herbalists as a nervine and mild sedative, traditionally taken to ease nervous tension, irritability and restlessness.
The genus Scutellaria is large and includes the medicinally important Chinese skullcap (Scutellaria baicalensis), a different species used in traditional Chinese medicine.
How to identify it
- Flowers: very small (about 6-8 mm), blue to lavender, two-lipped, borne in one-sided racemes from leaf axils; calyx bears the namesake helmet-shaped crest
- Leaves: opposite, lance-shaped to oval, toothed margins, on slender petioles
- Stems: square in cross-section (typical of mints), branching, 30-80 cm tall
- Habit: clumping herbaceous perennial spreading by short rhizomes
- Scent: lacks the strong aroma of many mints
Care & growing
Light: Full sun to partial shade; appreciates afternoon shade in hot climates.
Water: Prefers consistently moist soil and tolerates damp ground; do not let it dry out.
Soil: Rich, humusy, moisture-retentive soil with good organic content.
Temperature: Cold-hardy through roughly USDA zones 4-8.
Feeding: Light feeding with compost or a balanced fertilizer in spring is sufficient.
Propagation: Grow from seed (benefits from cold stratification), division of rhizomes, or stem cuttings.
Habitat & origin
Scutellaria lateriflora is native to wet habitats across much of North America, including marshes, wet meadows, streambanks and damp thickets from Canada south through the United States.
It is grown by herb gardeners and small-scale medicinal growers, usually in moist, partly shaded beds that mimic its natural wetland edges.
Uses & benefits
Medicinal: The dried aerial parts are a classic Western herbal nervine used in teas and tinctures to support relaxation and ease nervous tension; quality matters because the herb is sometimes adulterated with other species.
Ecological: The small flowers attract bees and other pollinators.
Ornamental: A subtle choice for native, pollinator and rain-garden plantings where its airy blue flowers add fine texture.
Frequently asked questions
Is American skullcap the same as Chinese skullcap?
No. American skullcap is Scutellaria lateriflora, used as a calming nervine, while Chinese skullcap is Scutellaria baicalensis (huang qin), whose root is used very differently in traditional Chinese medicine.
Why is it called skullcap?
The name comes from the small helmet- or cap-shaped appendage on the calyx of each tiny flower, which reminded early botanists of a skullcap helmet.
Does skullcap need a lot of water?
Yes. It is a wetland plant that prefers consistently moist, rich soil and does not tolerate prolonged drought.
Is skullcap safe?
In normal herbal amounts it is generally regarded as non-toxic, but reports of liver issues have been linked to products adulterated with other plants, so use a reputable source and consult a professional.
Skullcap guides
In-depth guides for identifying, growing, and caring for Skullcap.
