Few groundcovers spark as much divided opinion among gardeners as houttuynia cordata, more commonly known as the chameleon plant. Praised for its vividly colored, heart-shaped foliage and criticized for its aggressive spreading habit, this plant occupies a unique place in gardens across the United States and the United Kingdom. Some gardeners deliberately seek it out for its ornamental appeal, while others spend years trying to remove it once it takes hold.
This article examines the botanical characteristics of houttuynia chameleon plant, explains why it has earned a reputation as invasive, and offers a detailed look at practical strategies for controlling or removing it from garden beds and lawns.
What Is Houttuynia Cordata?
Houttuynia cordata is a herbaceous perennial native to Southeast Asia, including regions of China, Japan, Korea, and parts of the Himalayas. It belongs to the Saururaceae family, a small group of flowering plants often found in moist, shaded environments. In its native range, the plant has long been used in traditional cooking and folk remedies, particularly in parts of China and Vietnam, where its leaves are valued for their distinctive citrus-like aroma.
The common name “chameleon plant” comes from the striking, multicolored foliage found in certain cultivated varieties, particularly the popular cultivar known as ‘Chameleon’ or ‘Tricolor.’ These leaves display a blend of green, cream, yellow, and red tones, often described as resembling a painter’s palette. The heart-shaped leaves grow along creeping stems that root at each node, contributing significantly to the plant’s ability to spread rapidly across garden beds.
Small, white, four-petaled bracts surround a central spike of tiny flowers, giving the plant a delicate appearance that contrasts with its otherwise vigorous growth habit. This ornamental quality is precisely why the species was introduced into gardens throughout North America and Europe, despite the cautionary tales that often accompany its use.
Why Is Houttuynia Considered Invasive?
The reputation of houttuynia cordata invasive tendencies is well documented among horticulturists and land management professionals. The plant spreads through an extensive underground rhizome system, allowing it to colonize new areas even when the visible top growth appears limited or contained. These rhizomes are notably brittle, meaning that even small fragments left behind during removal attempts can regenerate into entirely new plants.
This resilience is compounded by the plant’s tolerance for a wide range of growing conditions. While it prefers moist, partially shaded sites, it can adapt to full sun and drier soil once established, allowing it to move beyond its original planting area into lawns, borders, and even cracks in pavement. In regions with mild, wet climates, such as much of the UK and the Pacific Northwest and Southeastern United States, conditions are especially favorable for unchecked expansion.
Because of these characteristics, the chameleon plant invasive label is not an exaggeration but a practical warning based on documented behavior in gardens where it has been introduced without containment measures. Many extension services and gardening authorities now list it among plants requiring caution or active management once planted.
Identifying Houttuynia in the Garden
Recognizing houttuynia chameleon in a garden setting is relatively straightforward once its features are familiar. The heart-shaped leaves, typically two to three inches long, grow alternately along low, spreading stems. The variegated cultivar displays a mix of colors, while the straight species tends toward more uniform green foliage with a slightly metallic or bluish sheen.
A distinguishing trait that often surprises gardeners unfamiliar with the plant is its strong scent. When leaves are crushed or bruised, they release a pungent aroma often compared to citrus, fish, or a combination of both, depending on the individual’s perception. This scent, along with the plant’s low, mat-forming growth habit and rapid lateral spread, helps differentiate it from similar-looking groundcovers.
The Appeal Despite the Risks
Understanding why gardeners continue to plant houttuynia cordata despite its invasive tendencies requires acknowledging its genuine ornamental value. The variegated foliage provides months of color without requiring flowers, making it useful for shaded areas where many flowering plants struggle. It also tolerates boggy or consistently wet soil conditions that would cause root rot in many other groundcovers, making it a practical choice for problem areas near ponds, drainage ditches, or low-lying garden beds.
In culinary contexts, particularly in Vietnamese cuisine, the fresh leaves are used as an herb, adding a distinctive flavor to salads and soups. This dual-purpose appeal, ornamental and edible, contributes to its continued presence in gardens despite widespread warnings about its spreading behavior.
How to Get Rid of Houttuynia Cordata
For gardeners currently dealing with an established patch, understanding how to get rid of houttuynia cordata requires patience and a combination of approaches, since no single method typically eliminates the plant in one attempt.
Manual Removal
Digging out the plant by hand remains one of the most direct methods, though it demands thoroughness. Because the rhizomes are extensive and fragile, careful excavation is necessary to remove as much of the root system as possible. Using a garden fork rather than a shovel can help lift soil gently, reducing the likelihood of snapping rhizomes and leaving fragments behind. This process often needs to be repeated multiple times over a growing season, as missed root fragments will continue to resprout.
Smothering and Light Deprivation
Covering the affected area with heavy-duty landscape fabric, cardboard, or black plastic sheeting can help exhaust the plant’s energy reserves by blocking sunlight. This method typically requires an extended period, often a full growing season or longer, to be effective, since the rhizomes can survive for extended periods without light before energy reserves are depleted. Combining this technique with periodic removal of any growth that manages to emerge along the edges of the covering improves the overall success rate.
Barrier Installation
For gardeners who want to grow houttuynia in a controlled manner rather than eliminate it entirely, installing a physical barrier around the planting area can help contain spread. Rigid, deep-set edging, buried at least twelve to eighteen inches into the soil, creates a boundary that rhizomes are less likely to breach. This approach works best as a preventive measure before the plant becomes established rather than as a solution for an already widespread infestation.
Selective Herbicide Use
In more severe cases, particularly where manual removal has proven insufficient, targeted herbicide application may be considered. Systemic herbicides that translocate to the root system tend to be more effective against rhizomatous plants like houttuynia than contact herbicides, which only affect visible foliage. Because of the plant’s tolerance for various conditions and its extensive root network, multiple applications over time are often necessary. Anyone considering this approach should carefully follow product instructions and local regulations, and consider consulting a professional landscaper or extension service for guidance specific to their region and site conditions.
Consistent Monitoring
Regardless of the method chosen, consistent monitoring after initial removal efforts is essential. New growth can emerge from overlooked rhizome fragments weeks or even months after the primary removal effort. Regularly inspecting the area and promptly addressing any resurgence helps prevent the plant from reestablishing a foothold.
Preventing Future Spread
For gardeners who wish to retain houttuynia cordata in their landscape while minimizing its invasive potential, container gardening offers a practical compromise. Growing the plant in large pots or raised planters with solid bottoms prevents rhizomes from escaping into surrounding soil while still allowing gardeners to enjoy its colorful foliage.
When planting in the ground is preferred, choosing an isolated area bordered by hardscaping, such as pathways, patios, or driveways, can naturally limit spread compared to open garden beds. Regular maintenance, including trimming back growth before it reaches the edges of the designated area, further reduces the likelihood of the plant escaping into unwanted areas of the landscape.
Environmental Considerations
Beyond individual garden management, the broader ecological impact of invasive groundcovers like houttuynia deserves attention. When such plants escape cultivation and establish themselves in natural areas, they can outcompete native vegetation, alter soil conditions, and disrupt local ecosystems that rely on native plant diversity. This is particularly relevant in moist woodland edges and riparian zones, environments that closely resemble the plant’s preferred growing conditions.
Gardeners in regions where houttuynia has been identified as a regional concern are often encouraged to avoid planting it altogether or to take extra precautions if it is already present on their property. Checking with local extension offices or invasive species councils can provide region-specific guidance on whether additional restrictions or recommendations apply.
Comparing Removal Methods
Choosing the right approach often depends on the size of the affected area, the gardener’s timeline, and how established the plant has become. Manual digging tends to work best for smaller, newly noticed patches where the root system has not yet spread extensively. It offers immediate visible results but requires diligence, since even a small missed rhizome fragment can lead to regrowth within weeks.
Smothering techniques suit larger areas where digging would be impractical or overly disruptive to surrounding plants. While slower, this method avoids the use of chemicals and can be combined with garden redesign, allowing the covered area to be replanted with a barrier system once the chameleon plant invasive growth has been sufficiently weakened.
Herbicide application, while often the fastest route to noticeable reduction, works best as part of an integrated strategy rather than a standalone solution. Combining a systemic herbicide treatment with follow-up manual removal of any surviving growth tends to produce more thorough, lasting results than relying on any single method alone.
Companion Planting and Garden Redesign After Removal
Once a houttuynia patch has been substantially cleared, thoughtful replanting can help discourage the plant from reestablishing itself. Dense, low-growing groundcovers with fibrous rather than rhizomatous root systems can occupy the same space and compete for light and moisture, making it more difficult for any remaining houttuynia fragments to regain a foothold. Plants suited to similarly moist or shaded conditions, such as certain ferns, hostas, or sedges, can provide an attractive alternative while naturally limiting bare soil where new shoots might otherwise emerge unnoticed.
Mulching newly cleared areas with a thick layer of organic material also helps suppress any lingering regrowth while improving soil structure for whatever is planted next. Regularly checking beneath the mulch during the following growing season remains an important habit, since persistent rhizome fragments can sometimes take a full year or more to fully exhaust themselves.
Final Thoughts
Houttuynia cordata, or the chameleon plant, presents a genuine dilemma for gardeners drawn to its unusual, multicolored foliage but wary of its well-documented tendency to spread aggressively. Its adaptability to a wide range of conditions, combined with its resilient rhizome system, makes it a plant that requires thoughtful management rather than casual planting.
For those already contending with an established patch, a combination of manual removal, light deprivation, and consistent monitoring generally offers the most reliable path toward control, though complete eradication can take considerable time and persistence. For gardeners considering adding it to their landscape, container cultivation or well-defined barriers provide a way to enjoy its ornamental qualities while minimizing the risk of it becoming an unwanted, spreading nuisance throughout the rest of the garden.
