Spilanthes oleracea ‘Starburst’ is a visually striking plant, recognized by its unique, button-like flowers with yellow and red centers. Beyond its ornamental appeal, this annual herb is known for a distinctive tingling or “buzzing” sensation it produces when its flowers or leaves are consumed. This intriguing quality, along with its cheerful appearance, makes it a fascinating addition to many gardens.
Growing Spilanthes ‘Starburst’
Cultivating Spilanthes ‘Starburst’ involves providing consistent environmental conditions to support its growth and flowering. This plant thrives in sunny locations, ideally receiving at least six hours of direct sunlight daily to encourage abundant blooms. While it tolerates some partial shade, especially in hotter climates, too little sun may result in fewer flowers and a less vigorous plant.
The plant performs best in well-draining soil that is rich in organic matter. Incorporating compost or aged manure improves its fertility and drainage, promoting healthy root development. Spilanthes ‘Starburst’ prefers a neutral pH, around 7, though it tolerates slightly acidic conditions. Consistent moisture is important; it prefers moderately moist soil and dislikes drying out. However, it is sensitive to waterlogged conditions, which can lead to root rot.
Spilanthes ‘Starburst’ is a frost-tender annual, meaning it will not survive freezing temperatures. It flourishes in warm weather, suitable for planting outdoors after all danger of frost has passed in spring, when soil temperatures are reliably above 60-65°F (16-18°C). While not a heavy feeder, a balanced fertilizer supports its overall health and flowering. A general-purpose fertilizer with a balanced N-P-K ratio, such as 10-10-8, or incorporating organic materials like compost, can be beneficial.
Harvesting Spilanthes ‘Starburst’
Harvesting Spilanthes ‘Starburst’ flowers and leaves throughout the growing season encourages continuous production and optimal potency. The flowers are considered the most potent part of the plant, but the leaves also possess the characteristic tingling sensation. For the strongest effect, harvest flowers when they have begun to elongate but still retain a prominent red center.
Regular harvesting of both leaves and flowers can begin once the plant has reached several inches in height. Simply pinching or clipping off the flower heads and leaves with your fingers or clean snips will suffice. This practice, similar to deadheading, directs the plant’s energy into producing more blooms and foliage, extending the harvest period until the first fall frost.
Propagating Spilanthes ‘Starburst’
Propagating Spilanthes ‘Starburst’ can be achieved through both seed and stem cuttings. Starting seeds indoors is a common method, typically done 4 to 6 weeks before the last expected frost. Seeds should be surface-sown or lightly pressed into moist seed-starting mix, as they require light for germination. Germination usually occurs within 5-14 days when temperatures are between 70-80°F (21-27°C). Once seedlings are large enough to handle and the danger of frost has passed, they can be transplanted outdoors.
Stem cuttings are another viable propagation method, ideally taken during spring or summer from healthy, non-flowering stems. Cuttings should be 4-6 inches long with a few sets of leaves, and lower leaves should be removed. Dipping the cut end in rooting hormone can enhance root development. These cuttings can then be placed in a well-draining, moist potting mix or rooted in water, with new growth indicating successful rooting.
Uses and Benefits of Spilanthes ‘Starburst’
Spilanthes ‘Starburst’ is widely recognized for its unique sensory properties and traditional applications. The plant is commonly known as the “toothache plant” due to its ability to produce a numbing, tingling sensation when its flowers or leaves are chewed. This effect is attributed to compounds like spilanthol, which can also stimulate salivation and provide temporary relief for mouth and gum discomfort. It has been traditionally used to address various dental issues, including gum diseases and toothaches.
Beyond its medicinal uses, Spilanthes ‘Starburst’ serves as a unique culinary herb. Its leaves and flowers can be incorporated into salads, cocktails, or other dishes to add a distinctive tingling sensation and a fresh, slightly bitter taste. This plant also offers significant ornamental value, with its bright, globe-shaped flowers adding visual interest to garden beds, containers, and window boxes. Its compact, sprawling habit makes it an attractive groundcover or accent plant. It is considered to have anti-inflammatory and antiseptic properties, further broadening its appeal.