Add it to your home screen and it opens full screen: no browser bars, one tap away, and everything stays signed in. Free, nothing to download from an app store.
- Tap the Share button in your browser
- Scroll down and choose “Add to Home Screen”
- Open GrowSomeFood from your home screen
- Open your browser’s menu
- Choose “Add to Home screen” or “Install app”
- Open GrowSomeFood from your home screen
Chinese Silvergrass
The silver-plumed ornamental grass in half the front yards in America - and a plant that quietly seeds itself into roadsides, old fields and forest edges, where the seedlings revert to a coarse green weed. It is a clumper, not a runner; the escape is by seed. Never plant it.
Chinese silvergrass is not a food or medicine plant, and it is not toxic to people, pets, or livestock. The real safety issue is fire: a mature clump dries to a dense mass of standing dead leaves and plumes that ignites easily and burns hot, so it is a poor choice against a house, deck, or fence in fire-prone country. The leaf edges are finely serrated and will slice skin - wear long sleeves and gloves when you cut it back.
Overview
The one thing to knowChinese silvergrass (Miscanthus sinensis), sold as maiden grass, zebra grass, porcupine grass and a hundred cultivar names, is probably the most-planted ornamental grass in the United States.
Chinese silvergrass (Miscanthus sinensis), sold as maiden grass, zebra grass, porcupine grass and a hundred cultivar names, is probably the most-planted ornamental grass in the United States. It is genuinely handsome: a tall, arching, vase-shaped clump that throws silvery-pink plumes in late summer and stands through winter looking like a piece of weather. It is also, across a large part of the country, an escaped invasive.
The escape route is worth being precise about, because the usual reassurance misses it. Nursery tags say clump-forming, not running - and that is true. It has no rhizomes creeping under the fence. What it has is seed: a mature clump produces plumes full of it, the wind carries it well beyond the garden, and it germinates in roadside gravel, powerline cuts, old fields, stream banks and forest edges. The seedlings do not look like the parent at all - the variegation and banding are cultivar traits that do not come true from seed, so escapees are plain, coarse, green, and eight feet tall. On top of that, a dry winter clump is excellent fire fuel. This entry is here to help you recognize it, decide what to do with the one you already have, and pick a native grass instead.
Quick facts
For identification. Not a growing guide.
- Life cycle
- Perennial, lives about 20 years
- Where it grows
- Full sun · Part sun, well-drained soil
- Height
- 7 ft4 to 12
- Spread
- 5 ft3 to 8
- Cold
- Takes hard frostdamaged below -25°F
- Heat
- Struggles above 105°F
- Self-sows
- Yes. Never let it set seed.
Through the year
How to recognize it in each season.
Spring green-up & summer clump (identify & control)
Apr to Aug, every year- Recognize it: a tall arching clump with a white midribA warm-season bunchgrass forming a dense, vase-shaped clump four to eight feet tall, with long arching leaves that carry a distinct pale WHITE MIDRIB down the center - the most reliable field mark. Leaf edges are finely serrated and will cut skin. It emerges late, well after cool-season grasses, and expands slowly outward from a tight woody crown. It does not run: there are no rhizomes creeping through the border.
- Pull escaped seedlings while they are smallSeedlings show up in gravel, bed edges, gutters, roadside ditches and any thin ground downwind, and they look nothing like the parent - plain green, no variegation, no banding. Pull or dig them in their first year, when the crown is still soft and comes out whole. A three-year-old escapee needs a mattock, and a mature one needs a saw.
- Walk downwind before you decide it stays putNursery tags say clump-forming, and that is true and beside the point. Before assuming your plant is well behaved, walk the ground downwind of it in early summer - fence lines, ditches, the neighbor's field edge, the powerline cut - and look for plain green seedlings. If they are there, the clump is a seed source, whatever its label says.
Key signs- Vase-shaped clumps with arching leaves and a white central midrib
- Plain green seedlings in gravel, ditches and thin ground downwind
- Late spring emergence, well after cool-season grasses
- A clump widening but not running
Late-summer plumes (the deadline)
Aug to Oct, every year- Fan-shaped plumes, silvery-pink to copperyFrom late August the clump throws fan-shaped flower plumes well above the foliage, silvery-pink, coppery or wine-red depending on cultivar, fading to silver-white as they dry. They are the reason people buy the plant, and they are also the seed heads. Early-blooming cultivars have the longest season to ripen seed, which makes them the worst offenders in warm regions.
- Cut the plumes off before the seed maturesIf you already have the plant and are not ready to remove it, cutting every plume off in early fall - while they are still soft and silky and before they fluff out and dry - is the single most useful thing you can do. Bag the cut plumes into the trash; do not compost them and do not use them in dried arrangements, which is a tidy way of moving seed indoors and then outdoors again.
Key signs- Fan-shaped plumes rising above the foliage from late August
- Plumes drying from pink or copper to silver-white
- Plumes cut for indoor arrangements (a seed vector)
Seed ripening & wind dispersal
Oct to Dec, every year- Fluffed plumes mean seed is movingOnce the plumes fluff open and shed a fine chaff, seed is dispersing on the wind - tens of thousands of seeds from a mature clump, carried well beyond the garden. Whether a given cultivar sets viable seed depends on the cultivar AND the climate: one that never ripens seed in a short northern season may seed heavily in a longer warm one, so a variety's reputation from a colder state does not transfer.
- Do not compost, chip, or move the plumesBag plume material into the household trash. Composting rarely reaches temperatures that reliably kill grass seed in a home pile, chipping scatters it, and hauling clippings to a brush dump moves the infestation to somewhere nobody is watching. If you are removing the clump entirely, take the plumes off and bag them first, then dig.
Key signs- Plumes fluffing open and shedding chaff
- Seedlings appearing the following spring downwind
- Clippings or plumes composted, chipped or dumped
Standing dry foliage (fire fuel & cut-back window)
Dec to Mar, every year- Treat a dry winter clump as fuel, not as winter interestThrough winter the clump stands as a dense mass of dry leaves and plumes that lights instantly and burns hot. Fire-safety guidance for the home ignition zone discourages ornamental grasses in the first five feet around a structure for exactly this reason. If a clump sits against siding, a deck, a fence or a propane tank in fire-prone country, cut it down early rather than leaving it for the look.
- Cut back to four to six inches in late winterCut the whole clump to four to six inches in late winter before new growth starts, using hedge shears or a hedge trimmer - tie the clump with twine first and it comes off in one manageable bundle. Wear long sleeves, gloves and eye protection: the leaf edges cut skin. Never burn the clump in place, which is a common and genuinely dangerous shortcut.
- Winter and early spring are the best times to dig one outThe dormant clump is easiest to remove: cut it low, then dig the whole crown. Mature crowns are dense and woody and usually need a sharp spade, a mattock, or a saw, and often a second person. Get the entire crown - a surviving fragment resprouts. Fill and mulch or replant the hole, and watch the spot for two seasons.
Key signs- Dry standing foliage against siding, decks, fences or tanks
- Woody crowns too dense for a spade alone
- Crown fragments resprouting after removal
- Dead centers in clumps more than three or four years old
Watch out for
4 to know. 1 is high-risk: Wind-Spread Seed & Escape. 2 are active in September.
Wind-Spread Seed & EscapeSeverity High DisordernowPlain green Miscanthus seedlings in gravel, ditches, bed edges and thin ground downwind of a clump; plumes fluffing open and shedding chaff in late fall; established stands along roadsides and utility rights-of-way.
Plain green Miscanthus seedlings in gravel, ditches, bed edges and thin ground downwind of a clump; plumes fluffing open and shedding chaff in late fall; established stands along roadsides and utility rights-of-way.
Pull or dig seedlings in their first year while the crown is soft. Remove garden clumps by cutting and bagging plumes, cutting the top low, and digging the entire woody crown; a fragment resprouts. For escaped stands too large to dig, foliar treatment of actively growing summer foliage with a product whose label lists the site, following that label.
Do not plant it. On an existing clump, cut every plume off in early fall while still soft and before it fluffs, and bag the plumes into the household trash - not the compost, not the chipper, not a dried arrangement.
The core hazard, and the one the clump-forming label distracts from: a mature clump produces plumes carrying thousands of light, silky-haired seeds that the wind moves well beyond the garden, germinating on bare disturbed ground - roadside gravel and ditches, powerline and pipeline corridors, old fields, stream banks and forest edges - where dense stands displace diverse vegetation. Seedlings revert to a plain green, coarse, eight-foot form, so escapees are unrecognizable as the parent. Cultivar fertility varies with the length of the growing season and with cross-pollination, so low-fertility claims do not transfer between regions.
Miscanthus MealybugSeverity Medium PestnowStunted shoots and shortened internodes, red or purple leaf discoloration, clumps that stop flowering, and white waxy insects tucked inside peeled-back leaf sheaths at the base.
Stunted shoots and shortened internodes, red or purple leaf discoloration, clumps that stop flowering, and white waxy insects tucked inside peeled-back leaf sheaths at the base.
There is no reliable home treatment once it is established inside the sheaths. Dig out and dispose of infested clumps rather than dividing and spreading them, and replace with a native bunchgrass.
Do not accept or pass on divisions from an affected clump - this is a good reason to decline a friend's offer of a Miscanthus division regardless of the invasiveness question.
A pest specific to this genus: the Miscanthus mealybug feeds inside leaf sheaths and at the crown, causing stunted, distorted growth, reddish or purple discoloration, and clumps that fail to flower or grow away in spring. Infestations are usually introduced on divisions or nursery stock rather than arriving on their own, and because the insect sits protected inside the sheath, contact sprays do very little.
Winter Fire FuelSeverity Medium DisorderDry standing clumps against siding, decks, fences, propane tanks or parked vehicles; continuous dry Miscanthus along a roadside or field edge near buildings.
Dry standing clumps against siding, decks, fences, propane tanks or parked vehicles; continuous dry Miscanthus along a roadside or field edge near buildings.
Cut the clump to four to six inches and remove the material; never burn it in place, which is a common and genuinely dangerous shortcut. Wear long sleeves, gloves and eye protection - the leaf edges cut skin.
Do not place ornamental grasses in the first five feet around a structure in fire-prone country. Cut clumps down early rather than leaving them standing for winter interest where ignition risk is real.
A direct property and safety hazard: through winter the clump stands as a dense mass of dry leaves and plumes that ignites instantly and burns hot and fast, and escaped stands add continuous fine fuel to roadsides and old fields that were previously patchy. Fire-safety guidance for the home ignition zone discourages ornamental grasses within the first five feet of a structure for exactly this reason.
Center Die-Out in Older ClumpsSeverity Low DisorderA hollow dead center in a clump older than about three years, a ring habit, and outer stems splaying open after rain.
A hollow dead center in a clump older than about three years, a ring habit, and outer stems splaying open after rain.
Lift and divide in late winter, or take the opportunity to remove the clump entirely and replant with a native bunchgrass. Bag any plume material before you start digging.
Divide clumps every three or four years, or accept the ring form. Full sun and drier soil delay the flopping.
A predictable decline rather than a disease: after three or four years the middle of a clump dies out, leaving a green ring around a bare, woody, waterlogged center that flops outward in summer storms. It is the normal habit of the plant, not a sign of anything wrong, and the usual remedy is division - which is also the moment to reconsider whether to keep it.
Grower tips
Notes from growers, tagged with the zone they grow in. A person reads every post before it appears.
Nobody has posted about Chinese Silvergrass yet.
Free account. Your post shows your grower name and zone, never your email.