Nandina (Heavenly Bamboo): Its Berries Are Blamed for Cedar Waxwing Deaths — That’s Why States Are Restricting It

Nandina domestica shows up in more American foundation plantings than almost any other broadleaf evergreen — it survives drought, shrugs off deer, and turns out clusters of bright red berries that hold on through the whole winter when nothing else in the yard has color. That same berry load is why a wildlife pathology lab in Georgia spent 2010 explaining, in a peer-reviewed journal, exactly how the plant had killed a flock of songbirds. Since then, one state has made it illegal to sell, several more have it on invasive-species watch lists, and Florida is mid-review right now. Almost none of that regulatory picture gets reported accurately, because most articles collapse \”listed as invasive\” and \”banned\” into the same claim. They aren’t the same thing, and which one applies to you changes what you should actually do about the nandina already in your yard.

What Nandina Is, and Why It’s in So Many Yards

Nandina domestica — sold as heavenly bamboo or sacred bamboo, though it’s not a bamboo at all — is an evergreen shrub in the barberry family, native to China and Japan and brought to the United States in 1804 as an ornamental. It grows 3 to 8 feet tall with a similar spread, on cane-like stems topped with fine, feathery compound foliage that often flushes red in cold weather. White flower clusters appear from April through June, followed by the red berries that persist into late winter. It tolerates full sun to deep shade, needs almost no maintenance, and has no serious pest or disease problems worth managing — which is exactly why landscapers have leaned on it for four decades.

The plant spreads two ways: underground by rhizome, so a single shrub slowly widens into a colony, and by seed, after birds eat the berries and deposit them in nearby woods and fence lines. Given enough time near a wild edge, that second pathway is how a foundation planting becomes a naturalized population the local extension office has to explain to homeowners. I’ve seen this play out in older Southeastern neighborhoods firsthand — a single foundation shrub planted in the 1990s, with a thin trail of volunteer seedlings now showing up along the tree line thirty feet away, well past where anyone intentionally planted anything.

The Cedar Waxwing Case That Changed How Scientists Talk About Nandina

In April 2009, dozens of cedar waxwings were found dead in Thomas County, Georgia. Veterinary pathologists at the University of Georgia necropsied five of the birds and published their findings in the Journal of Veterinary Diagnostic Investigation. The lungs, liver, kidneys, and heart were diffusely congested and hemorrhagic — most severely in the lungs — a pattern consistent with cyanide poisoning [1].

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Here’s the mechanism, not just the outcome: nandina berries and leaves contain cyanogenic glycosides, compounds that release hydrogen cyanide when broken down during digestion. Cyanide is a mitochondrial poison — it blocks cytochrome oxidase, the enzyme cells use at the very end of the respiratory chain to actually use oxygen. Block that enzyme and the bird’s cells can’t extract energy from oxygen even though oxygen is right there in the bloodstream. Death from acute cyanide poisoning can happen within minutes to hours, which fits the field reports of birds found dead in place, without obvious signs of illness beforehand [1].

Cedar waxwings are unusually exposed to this risk because of how they eat. They’re near-obligate fruit eaters that gorge in flocks, stripping a shrub of its entire berry crop in one sitting rather than sampling a few berries and moving on. A bird that eats a moderate number of nandina berries individually might be fine; a waxwing that eats several dozen in one feeding bout is a different case entirely — the dose is in the behavior, not just the plant.

Ripe Berries Aren’t the Safe Ones

Most people assume a fully ripened, softened berry is the least toxic stage of any fruit. Nandina inverts that. The ASPCA lists cyanogenic glycosides as the toxic principle across the whole plant [5], and the National Capital Poison Center is more specific: the leaves and green, unripe fruit are strongly cyanogenic, while fully ripe red berries are less so [12] — though still capable of poisoning a bird that eats enough of them. The Georgia researchers also floated a second variable: cool, moist growing conditions may push the plant toward producing more cyanogenic glycosides and less protein that year, which could explain why some winters produce mass poisoning events and most don’t [1]. In practice, this means there’s no visual cue — no color, no wilting, no obvious \”safe now\” stage — that tells you the berry crop on a given shrub, in a given year, is lower risk than the one growing next to it.

Toxic to Dogs, Cats, and Horses Too

The same cyanogenic glycosides make nandina toxic to dogs, cats, and horses, according to the ASPCA’s Animal Poison Control database. Clinical signs follow the same cyanide-poisoning pattern seen in birds: weakness, loss of coordination, seizures, coma, and respiratory failure [5]. The important caveat, and the reason this doesn’t top most emergency-vet call logs: death from nandina ingestion is documented as rare in pets, mainly because a cat or dog would need to eat a large quantity of plant material relative to its body size to reach a toxic dose, and most pets don’t graze on ornamental shrubs the way a flock of waxwings strips a berry crop. North Carolina State Extension lists nandina as toxic to humans, cats, dogs, livestock, and horses in addition to birds, which is the reason removal is generally recommended in yards with grazing livestock or small pets that chew on landscaping [3]. Treat it as a real but low-probability risk for pets — worth removing access, not worth panic.

\”Banned,\” \”Restricted,\” or Just \”Discouraged\”? What Each State Actually Does

Search \”states that ban nandina\” and you’ll find the same sentence repeated across garden blogs: nine states — Missouri, Kentucky, Virginia, Tennessee, Alabama, Georgia, South Carolina, Florida, and Maryland — \”consider it invasive.\” That’s true, and it’s also not the same claim as \”banned.\” An invasive-species listing from a state pest council or university extension is an advisory flag: it tells nurseries and gardeners the plant is a documented ecological problem, but it carries no legal weight and doesn’t stop a garden center from selling it. A sales ban is a regulation with an enforcement date. Confusing the two means a gardener in South Carolina might assume nandina is illegal to buy when it isn’t, or a gardener in Maryland might not realize their existing shrub is now covered by a statewide phase-out.

The practical takeaway: as of now, Maryland is the only state where selling nandina is actually illegal. Everywhere else on that list of nine, the plant is legal to buy — the states are telling you not to, through extension guidance and invasive-species councils, rather than stopping you. That distinction matters for how urgently you need to act, which is the next question.

Should You Dig Yours Up? A Decision Framework

Not every nandina in the ground is the same risk. Work through this in order:

1. Check whether you have a fruiting cultivar. The wild-type species and heavy-fruiting cultivars like ‘Alba,’ ‘Compacta,’ ‘Moyer’s Red,’ and ‘Plum Passion’ produce abundant viable seed and are the ones driving naturalization into woodlands. Low- or non-fruiting cultivars — ‘Firepower,’ ‘Firestorm,’ ‘Gulf Stream,’ ‘Harbour Dwarf,’ and ‘Murasaki’ among others — were bred for compact form and rarely flower or fruit heavily, cutting the seed-dispersal risk sharply [2].

2. Don’t assume “sterile” means zero spread. Alabama Cooperative Extension notes that even non-fruiting cultivars like ‘Firepower’ and ‘Harbor Belle’ can still expand by rhizome, so they recommend container planting or a root barrier if you want the look without the spread risk [4].

3. Weigh your location. If you’re in Maryland, plan the swap now — you’re working against a legal phase-out timeline for new purchases even if your existing shrub isn’t required to come out. If you’re near a woodland edge, creek, or undeveloped lot anywhere in the Southeast, the seed-dispersal risk is higher regardless of what the law says, because that’s exactly the habitat birds carry the seeds into.

4. If you’re keeping it short-term, deadhead the flower clusters before they set fruit — this eliminates the wildlife toxicity risk and the seed spread in one step, at the cost of losing the winter berry display that’s the plant’s main selling point.

5. If you’re removing it, dig out the root system rather than cutting at the base; rhizome fragments left in the soil will resprout. Established colonies may take more than one season of follow-up removal.

Native Alternatives That Actually Match the Job Nandina Does

The honest reason nandina got planted so often is that it checks boxes few natives check at once: evergreen, deer-resistant, tolerant of both sun and shade, and low-maintenance. NC State Extension’s recommended substitutes include American beautyberry, buttonbush, native viburnums, winterberry holly, and inkberry holly (Ilex glabra) [3] — and inkberry is the closest one-for-one match for nandina’s role as a dense, evergreen foundation or screening shrub, without the toxicity or invasiveness. If you want to swap out invasive ornamentals across the whole bed rather than one shrub at a time, our guide to replacing invasive ornamentals with native keystone plants walks through 15 more pairings like this one.

One trade-off worth knowing before you commit: inkberry is dioecious, meaning you need both a male and female plant nearby for the female to set the berries that feed wildlife — a straight one-for-one swap of a single nandina won’t automatically replicate the berry display [11]. It also carries a high flammability rating, so extension guidance advises against planting it inside the defensible space immediately around a house in wildfire-prone regions [11]. Beautyberry and winterberry holly are worth considering instead if you want berries without the pairing requirement.

Replacing a Nandina Hedge Without Losing the Screen

If your nandina is doing hedge duty — a privacy screen or property-line planting rather than a single specimen shrub — swapping it out is a bigger project than pulling one plant. Our best hedge plants guide covers non-invasive options sized for formal privacy screens, flowering hedges, and wildlife-friendly borders, so you’re not starting the selection process from scratch. And if part of what’s driving the removal is a nandina hedge that’s grown leggy or bare at the base rather than the invasiveness itself, it’s worth ruling out a fix first — our guide to hedge shearing versus renovation explains when a hard cutback saves an overgrown hedge and when replacement really is the better call.

Frequently Asked Questions

Is it illegal for me to keep the nandina already growing in my yard?
No. Every current restriction, including Maryland’s, targets the sale of new plants, not ownership of existing ones. You’re not required to remove a nandina you already have because of any state law as of this writing.

Can I still buy nandina where I live?
Almost certainly yes, unless you’re in Maryland. Being listed as invasive by a state pest council or extension service doesn’t stop a nursery from selling it — only an actual sales-ban regulation does, and Maryland is currently the only state with one in effect.

Do sterile cultivars produce zero berries?
Not necessarily zero, but far fewer. ‘Firepower,’ ‘Gulf Stream,’ and similar cultivars were selected for compact form and typically flower and fruit lightly compared to the species, which lowers both the toxicity exposure and the seed-dispersal risk — though they can still spread by rhizome.

Is the plant dangerous just to touch or prune?
No known contact toxicity is documented; the cyanogenic glycosides are a digestive-ingestion risk, not a skin-contact one. Standard care wearing gloves while pruning is about avoiding the cut cane tips, not the plant’s chemistry.

How do I tell if my nandina is a heavy-fruiting type or a sterile cultivar?
Check the plant tag or receipt if you still have it; otherwise, watch it through one flowering season — heavy-fruiting types set dense clusters of pea-sized red berries by late fall, while true sterile cultivars flower lightly and set little to no fruit. A local extension office can also identify the cultivar from a leaf and stem sample.

Key Takeaways

Nandina’s berry toxicity is real and well-documented back to a specific 2009 cedar waxwing die-off in Georgia, but the regulatory picture gardeners usually read is oversimplified. Only Maryland currently bans its sale; Florida is reviewing but hasn’t acted; South Carolina banned other invasive shrubs but not this one; the rest of the nine “invasive” states rely on advisory listings with no legal force. What should actually drive your decision isn’t which list your state is on — it’s whether your shrub is a heavy-fruiting type near a wild edge (swap it out) or a sterile cultivar in an enclosed yard (lower priority, but still worth deadheading if pets or wildlife have access to the berries).

Sources

• [1] “Feeding Behavior-Related Toxicity due to Nandina domestica in Cedar Waxwings (Bombycilla cedrorum)” — Journal of Veterinary Diagnostic Investigation, via PMC
• [2] “Nandina” — Clemson Cooperative Extension Home & Garden Information Center
• [3] “Nandina domestica” — NC State Extension Gardener Plant Toolbox
• [4] “Nandina: Attractive Yet Problematic” — Alabama Cooperative Extension System
• [5] “Toxic and Non-toxic Plants: Nandina” — ASPCA Animal Poison Control
• [6] “Maryland Expands Prohibited Invasive Plant List” — Maryland Native Plant Society
• [7] “Maryland Tightens Regulations on Invasive Plants As New Rules Take Effect” — The BayNet
• [8] Fla. Admin. Code Ann. R. 5B-57.007, Noxious Weed List — via Cornell Law School Legal Information Institute
• [9] “These Are The Florida Shrubs Moving From Legal To Illegal” — PositiveBloom
• [10] “Invasive Bradford Pear, 3 Other Species to Be Banned for Sale in SC” — Clemson News
• [11] “Ilex glabra (Appalachian Tea, Gallberry, Inkberry)” — NC State Extension Gardener Plant Toolbox
• [12] “What to Know About Nandina domestica — or ‘Heavenly Bamboo'” — National Capital Poison Center (Poison Control)