Updated on September 8, 2026. Ratings below are university browse lists, not a nursery tag. Confirm the current lists on the linked extension pages before you treat a grass clump as a fence.
Rarely. Iowa State Extension, compiling Rutgers, Cornell, and Michigan State surveys (last reviewed July 2022), puts the same kind of footnote on ornamental grasses that it puts on ferns: nearly all ornamental grasses are not browsed on by deer. The named rarely-damaged column includes switchgrass, fountain grass, little bluestem, blue fescue, feather reed grass, hakonechloa, northern sea oats, Indian grass, and Japanese silver grass. University of Georgia Circular 985 keeps its own table, “Ornamental Grasses Deer Rarely Browse.” That is the opposite of hostas, which Iowa State files as frequently severely damaged.
This is not the lawn-grass question. Deer will graze a tender lawn strip when better forage is gone — that answer lives on do deer eat grass. A four-foot clump of switchgrass is a different plant: coarser, silica-stiff, and low on the succulent tissue a white-tailed deer wants. For the rest of the bed, start at the deer-proof garden hub. Wild diet is on what deer eat.
| Plant | Garden ornamental grasses (Poaceae and a few lookalikes): switchgrass, fountain grass, little bluestem, blue fescue, feather reed, hakonechloa, northern sea oats, pink muhly. Liriope and mondo grass are not true grasses. |
|---|---|
| Verdict | Rarely eaten. Plant them as the sun (or hakonechloa shade) backbone, not as a decoy to save hostas or tulips. No clump is deer-proof in a lean winter. |
| University rating | Iowa State: rarely damaged; “nearly all ornamental grasses.” Rutgers A on big bluestem, blue fescue, fountain grass, feather reed, giant Japanese silver grass. UGA C985: dedicated rarely-browse grass table (they dropped known invasives). NC State: switchgrass “seldom bothered by deer browsing.” |
| What they eat, when | Almost never mature blades. Minnesota: spring is when deer eat new growth of grasses. That is the window on a first-year plug, not on a four-year clump. Winter standing stems are cover, not groceries. |
| Where it is worst | Not browse. Worst damage is trampling on a travel path, bucks bedding in a tall miscanthus screen, or a fire-prone dry clump too close to the house. NC State flags switchgrass as high flammability. |
| Official sheets | Iowa State — susceptibility of plants to deer damage · Rutgers NJAES deer-resistance list · UGA Circular 985 · NC State — switchgrass · Minnesota — white-tailed deer damage |
What an ornamental grass is — and what is not one
These are clumping grasses grown for blades, fall color, and winter silhouette, not for a mowed lawn. Iowa State’s rarely-damaged column is the catalog people actually buy: switchgrass (Panicum virgatum), fountain grass (Pennisetum alopecuroides), little bluestem (Schizachyrium scoparium), blue fescue (Festuca glauca), feather reed (Calamagrostis), hakonechloa (Hakonechloa macra), northern sea oats (Chasmanthium latifolium), and Japanese silver grass (Miscanthus sinensis). Most sedges (Carex) sit on that same column. Rutgers rates big bluestem, blue fescue, fountain grass, feather reed, and giant Japanese silver grass A — rarely damaged.
NC State’s toolbox is the culture sheet for the native that should replace a lot of the Asian clumps. Switchgrass is a North American prairie grass, 3 to 7 feet with the plumes, hardy roughly Zones 5–9. Full sun, prune in late winter, tagged deer-resistant. Cultivars people actually plant: ‘Northwind’, ‘Heavy Metal’, ‘Shenandoah’. Seeds feed songbirds. The honest downside is also on that sheet: high flammability — do not pack it against the siding.
Two lookalikes are not Poaceae. Lilyturf (Liriope) and dwarf mondo grass (Ophiopogon japonicus) are sold in the grass aisle. UGA files dwarf mondo with groundcovers deer rarely browse. A mondo edge will not give you a six-foot winter screen.
What they eat, and when
Most years they eat none of it. Iowa State’s grass footnote is the grade. The remaining window is the one Minnesota Extension flags for the whole landscape: spring, when fat reserves are lowest and deer “mostly eat the new growth of grasses and leafy plants.” That sentence is about wild spring flush and a tender plug, not a four-year switchgrass clump. UGA’s circular is the mechanism: fertilized landscape plants are protein- and moisture-rich, and deer get about a third of their water from succulent tissue. A fibrous ornamental blade is the opposite snack. Minnesota also notes that in a scarce winter deer will eat “any available vegetation including dried leaves, sedges, grasses.” A starving herd can sample a first-year fountain grass. That is the disclaimer on every “rarely damaged” list, not a reason to skip the genus. Dawn and dusk traffic still follows deer feeding times — they walk the grass border to reach the hosta bed. Walking past is not eating.
Deer vs rabbits vs hooves vs fire
Minnesota’s field test still applies: deer have no upper incisors, so they grasp and rip. A deer nip is a torn, shredded stub, often above rabbit height, with split-heart prints and oval pellets. Rabbits leave a clean 45-degree cut, usually within a foot of the ground — full tactics on how to keep rabbits out of the garden. A new blue-fescue plug is the rabbit plant. An established miscanthus hedge is not.
The damage grasses actually take in a deer yard is often trampling, or a buck bedding in a tall screen. Flattened crowns, heart-shaped tracks, blades still attached. That is a deer-as-pests layout problem, not a palatability problem. NC State’s switchgrass fire rating is the other real risk: dry winter standing stems carry fire. Leave them for winter interest and bird seed, then cut in late winter — not against the house.
Region: the rating is easy; the species choice is not
Suburban Northeast and Mid-Atlantic lots are where Rutgers built the A ratings because the herd is dense and every other house planted hostas under a maple. Grasses are the honest sun swap in that yard. Upper Midwest prairie grasses get the same Iowa State grade. Southeast muhly and switchgrass country is where NC State and UGA are writing. University of Arizona’s August 2025 mule-deer survey is the western check: ornamental grasses, blue fescue, fountain grass, maiden grass, and little bluestem came back never-to-rarely damaged in the responses they had. Sample sizes are small. It still matches the eastern lists.
The unique trap is Miscanthus sinensis. Iowa State and Rutgers rate Japanese silver grass rarely damaged. UGA’s circular does not put it on the grass table. That is not a disagreement about deer. UGA’s rule: plants known to be invasive “were excluded from the list,” regardless of deer tolerance. Missouri Botanical Garden is the inventory: maiden grass has escaped onto roadsides in more than 25 U.S. states and is considered invasive in several eastern states, where it forms colonies and can change fire behavior. Iowa also lists giant reed (Arundo donax) as rarely damaged. Do not plant that one either. Native substitutes already on the same lists: switchgrass, little bluestem, pink muhly, northern sea oats. If you hunt that eastern woods-and-suburb overlap, the trip page is Pennsylvania deer hunting. The yard problem is still the hostas.
What actually works
Plant the grass. Fence the candy.
- Swap the sun border. Hostas, tulips, and roses are frequently severely damaged. Switchgrass, little bluestem, fountain grass, and feather reed fill the same height without joining the menu. That is species choice doing the work, not a spray schedule.
- Match species to the hole — and skip the invaders. Switchgrass or little bluestem for a prairie screen. Fountain grass for a 3-foot clump. Blue fescue for a silver edge. Hakonechloa for the shade bed where you were about to buy more hostas. Pink muhly for a Southeast late-summer haze. Do not plant species-form miscanthus or giant reed because a deer list said A.
- Protect the neighbors, not the grasses. Minnesota’s height for a real enclosure is a woven-wire fence at least 8 feet tall. A 4-foot decorative fence is a step — deer clear that without thinking. Check local height rules. Fence layout: how to keep deer out of garden beds.
Find 8-foot deer fence on Amazon Amazon associate tag checkcheck-20. We may earn a commission.
Find switchgrass plants on Amazon Amazon associate tag checkcheck-20. We may earn a commission.
Find little bluestem plants on Amazon Amazon associate tag checkcheck-20. We may earn a commission.
Egg- or capsaicin-based sprays belong on the plants deer actually eat, or on a first-year plug for two weeks in a slammed suburb. Rotate formulas and respray after rain. Which bottles last is on organic deer repellent. Plant the grasses next to the house on a walked path, not as a screen on the woodlot edge a deer already uses as a bed.
Find egg-based deer repellent on Amazon Amazon associate tag checkcheck-20. We may earn a commission.
What does not work
A ring of fountain grass around unprotected hostas. UGA allows that pungent neighbors can help, and also says there is no deer-resistant plant when food is scarce. Three switchgrass clumps will not hide a hosta mound. Hair in bags, bar soap, dryer sheets, and a 4-foot picket fence fail here the same way they fail everywhere. Feeding the herd trains them to the property — what to feed backyard deer is the page that says don’t. Planting miscanthus because it is “deer-proof and low-maintenance” imports a roadside invader into a 20-foot bed. No sourced university list makes one named cultivar deer-proof.
Three substitutes that already earn their keep
Ornamental grasses are the sun-and-texture substitute. If the hole is a flower, or shade without a grass look:
- Lavender — Iowa State: herbs rarely damaged. Gray mint-family subshrub for the hot, dry strip a grass also likes. It will not give you a six-foot winter screen.
- Ferns — Iowa State: “nearly all species” rarely damaged. The shade swap when hakonechloa is not enough height. Ostrich and Christmas ferns, not hay-scented.
- Peonies — Iowa State: rarely damaged perennial. Big May bloom deer usually skip. They will not give you fall color or a winter silhouette.
Salvia and sedum sit on the same university lists for a mixed border. They live with the grasses on the deer-resistant perennials list. Short flower shortlist: what flowers deer do not eat. Daffodils cover the spring bulb slot in front of the grass clump.
Related plants in the same yard
If deer ignored the grasses and shredded the rest of the strip, believe the ratings. Hostas go first in shade. Tulips go in April. Roses, including Knock Out roses, sit in Iowa State’s frequently damaged woody column. Hay is stored forage, not a clump in the border. Protect the candy. Layout: how to keep deer from eating plants.
FAQ
Are all ornamental grasses deer-resistant?
Nearly all commonly grown garden species are rarely damaged on Iowa State, Rutgers, and UGA lists. Spring flush on a new plug, and a starving winter herd, are the exceptions. Liriope and mondo grass are not true grasses; they are still usually skipped. Giant reed and species-form miscanthus are skipped by deer and still bad plants to add.
Will ornamental grasses grow back if deer eat them?
Usually yes. The crown sits at soil level. Losing some spring blades rarely kills an established clump. A pulled-out first-year plug is a rabbit or a poorly planted pot. Cut standing stems in late winter so new shoots are not trapped in last year’s thatch.
Do deer eat fountain grass or pampas grass?
Not as a habit. Iowa State and UGA both put fountain grass (Pennisetum alopecuroides) on the rarely-browsed grass list. UGA also lists pampas (Cortaderia selloana). Those ratings are about browse, not about whether pampas belongs in your climate. Check invasiveness locally before you copy a Georgia table into a California or Gulf Coast yard.
Why are my grasses flattened if deer do not eat them?
Hooves, or a bed. Minnesota: deer are creatures of habit and reuse paths. A tall miscanthus or switchgrass screen is cover. Put the candy farther from the woodlot edge, stop feeding, and do not treat a flattened clump as a browse failure. Midsummer shredded blades with no tracks are more often storm, dog, or a string trimmer than a deer that suddenly developed a grass habit.
Sources
- Iowa State Extension — Susceptibility of plants to deer damage (ornamental grasses rarely damaged; “Nearly all ornamental grasses are not browsed on by deer”; sources: Rutgers, Cornell, Michigan State; last reviewed July 2022)
- Rutgers NJAES — Landscape plants rated by deer resistance (big bluestem, blue fescue, fountain grass, feather reed grass, giant Japanese silver grass rated A, rarely damaged; no plant is deer-proof)
- UGA Extension Circular 985 — Deer-tolerant ornamental plants (dedicated ornamental-grasses rarely-browse table; invasives excluded regardless of deer tolerance; full review Feb. 1, 2016)
- NC State Extension Gardener Plant Toolbox — Panicum virgatum (Zones 5–9; 3–7 ft; deer-resistant; high flammability; winter bird seed)
- Missouri Botanical Garden Plant Finder — Miscanthus sinensis (deer-tolerant; escaped in 25-plus states; invasive in several eastern states)
- University of Minnesota Extension — White-tailed deer damage (spring new-growth grasses; winter “any available” including grasses and sedges; torn vs 45-degree cuts; 8-foot woven-wire fence; reviewed 2026)
- University of Arizona Extension az2098b — Deer plant resistance ratings (August 2025; mule deer survey; ornamental grasses, blue fescue, fountain grass, maiden grass, little bluestem never-to-rarely damaged in the responses reported)
This is a child of the deer-proof garden guide. Wild browse, not a border-grass swap, is on what deer eat.
