Stachys bullata aka California Hedgenettle

Stachys bullata is an easy-care plant that tolerates a wide range of growing conditions. It adapts to soil types from sandy to heavy clay, handles varying pH levels, and once established becomes remarkably drought tolerant — specimens at Las Pilitas Nursery survived over 12 years without supplemental water. It requires little maintenance beyond cutting back dead flower stalks and occasional thinning of spreading rhizomes.

Stachys bullata thrives in the temperate climate of coastal California and performs best in mild conditions. It tolerates light frost and is hardy to approximately USDA zone 7 (minimum around -18°C / 0°F). The plant goes deciduous in winter, dying back to the ground and re-emerging in spring when temperatures warm. It prefers the moderate temperatures typical of coastal California and may struggle in extreme heat unless provided with shade and adequate moisture.

Stachys bullata produces attractive lavender-pink to purple tubular flowers from April through August. The two-lipped flowers are approximately 1 centimeter long, arranged in interrupted whorls of about six flowers each along the upper stems. They are borne in hairy calyces on 1-2 foot spikes and make suitable cut flowers. The blooms are highly attractive to bees, butterflies, and hummingbirds.

Stachys bullata can be propagated by seed, division, or stem cuttings. Seeds should be sown in spring in a cold frame; once seedlings are large enough to handle, prick them into individual pots and grow on in a greenhouse for their first winter, then plant out in late spring after the last frost. Division is done in spring by separating the rhizomatous root clumps. Stem cuttings can be taken in spring or early summer and rooted in moist growing medium.

Stachys bullata is exclusively an outdoor plant, native to the California coast ranges from San Francisco to Los Angeles. It grows in USDA zones 7-10 and thrives in partial shade, tolerating full sun only in coastal areas with marine fog influence. It is an excellent choice for woodland gardens, shady slopes, bioswales, pond margins, and butterfly gardens. The spreading rhizomes make it effective for erosion control, and it is deer resistant.

Stachys bullata is endemic to western California, found along the coast ranges from San Francisco south to Los Angeles, including the Channel Islands. It grows at elevations from sea level to approximately 500 meters (1,600 feet) in diverse plant communities including coastal sage scrub, chaparral, mixed-evergreen forest, and redwood forest. Its native habitat includes oak, pine, and fir woodlands, as well as sandy, gravelly, or peaty shores and bogs.

Stachys bullata has aromatic foliage, as is characteristic of many plants in the mint family (Lamiaceae). Theodore Payne Foundation specifically notes it has a 'nice scent,' and the Rocky Point cultivar is described as an 'aromatic groundcover.' The fragrance comes from the leaves rather than the flowers.

Stachys bullata is deciduous and goes dormant in winter, dying back to the ground. It re-emerges in spring when temperatures warm. During the growing season (spring through fall), provide moderate watering for best appearance, though established plants tolerate drought. Cut back dead flower stalks after blooming finishes in late summer, ideally after birds have eaten the seeds. No special winter protection is needed within its hardiness range.

Stachys bullata requires minimal pruning. Snip off dead flower stalks after blooming, ideally after birds have had a chance to eat the seeds. During the growing season, remove any dead or damaged leaves to maintain a tidy appearance. Since the plant spreads by underground rhizomes and can sucker freely, you may need to periodically thin or contain the colony by removing unwanted runners at the edges.

Stachys bullata is a fast-growing perennial that reaches 50-100 centimeters (1.5-3 feet) tall with an individual plant spread of 70-100 centimeters. However, it spreads indefinitely via underground rhizomes to form expanding colonies, making it an effective groundcover. The medium-green, softly fuzzy leaves with scalloped edges grow on erect stems coated in rough hairs. The plant is deciduous, dying back to the ground in winter and re-emerging vigorously in spring.

Stachys bullata is hermaphrodite (bearing both male and female organs) and is primarily pollinated by insects, particularly bees. The lavender-pink tubular flowers also attract butterflies and hummingbirds, making it a high-value wildlife plant. It is noted as a good bee plant by PFAF and multiple California native plant sources. The interrupted whorls of flowers along the stems provide easy access for pollinating insects.

The most notable cultivar is Stachys bullata 'Rocky Point', a selection named for a California coastal location. It is described as a fast-spreading aromatic groundcover that bears pink-purple flowers into summer, growing 1-3 feet tall. It shares the species' adaptable nature and high wildlife value. 'Rocky Point' is occasionally available from California native plant specialty nurseries such as Theodore Payne Foundation.

Stachys bullata is generally pest and disease resistant. It is notably deer resistant, making it a good choice for gardens where deer browsing is a concern. As a California native adapted to local conditions, it has few significant pest or disease problems when grown within its native range. Excessive moisture or poor drainage could potentially lead to root rot, as with most plants in the mint family.

Stachys bullata has documented traditional medicinal uses among California's indigenous peoples. The leaves possess disinfectant and stomachic properties — infusions were used to treat stomach ailments, and leaf/stem washes were applied to wounds and infections. Heated leaf poultices were used for earaches and boils, while root decoctions served as gargles for sore throats. PFAF rates its medicinal value at 1 out of 5, reflecting limited but documented folk use.

Beyond ornamental garden use, Stachys bullata serves several practical landscape functions. Its spreading rhizomatous root system makes it effective for erosion control on shady slopes. It is well-suited for bioswales and rain gardens where it tolerates seasonal flooding. The plant's high wildlife value — attracting bees, butterflies, and hummingbirds — makes it excellent for pollinator gardens and habitat restoration projects.

California Hedgenettle should be watered regularly, allowing the soil to dry out between waterings.

California Hedgenettle loves a well-draining soil. Perlite and vermiculite help with drainage, while coco coir adds organic matter, so a good potting soil mix will have all three. You can improve store-bought soil by adding some perlite to it.

To ensure optimal growth, the California Hedgenettle prefers bright diffused light for 6-8 hours each day. Insufficient light can result in slow growth and leaf drop, so it's important to find a well-lit location for this plant. Place it near a window, within a distance of 1 meter (3 feet), to enhance its potential for thriving.

The California Hedgenettle should be repotted either when it doubles in size or annually, whichever comes first. Providing new potting soil with all the vital nutrients annually is enough to support the growth of the plant, and thus, there is no need for fertilizer. Remember that plants derive their energy from the sun, not fertilizer.

Ploi's records do not contain confirmed information on the toxicity of this particular plant. In the event of accidental ingestion of plant material with questionable toxicity by you, a family member, or a pet, it is always a good idea to consult a healthcare professional.