Updated on September 8, 2026. Ratings below are university lists, not a guarantee for your street. Confirm the current lists on the linked extension pages before you treat a forsythia hedge as deer-proof.
Seldom. Deer usually skip forsythia. Iowa State Extension, compiling Rutgers, Cornell, and Michigan State surveys (last reviewed July 2022), files Forsythia spp. with the trees and shrubs seldom severely damaged. Cornell’s woody list splits the genus: generic forsythia sits in seldom severely damaged; border forsythia — the hybrid almost every garden center sells — sits one column worse, as occasionally damaged. NC State says the same plant “can be occasionally damaged by deer.” Minnesota Extension puts Forsythia ‘Northern Sun’ on its deer-resistant plant table. That is not a fence, and it is not a force field for the hostas you planted in front of it.
| Verdict | Seldom eaten. Border forsythia (F. × intermedia) is the one Cornell and NC State still flag as occasional browse. |
|---|---|
| University rating | Iowa State (Rutgers / Cornell / MSU): Forsythia spp. seldom damaged woody. Cornell: forsythia B-class; border forsythia C-class. Minnesota: ‘Northern Sun’ on the resistant table. UGA Circular 985 does not list the genus in either column. |
| What they eat | Tender new leaves and twig tips on young plants; winter flower buds on last year’s wood. Not a preferred winter evergreen salad. |
| Peak | Spring flush on new plantings; January–March bud browse if the herd is already on the circuit. Fall antler rub is a separate problem. |
| What works | Plant a bud-hardy cultivar; cage a new hedge two winters; an 8-foot fence for the candy plants, not for the forsythia itself. |
| What does not | “Lynwood Gold is deer-proof”; blaming deer when only the snow line bloomed; a 4-foot picket; using forsythia as a decoy to save roses. |
This is a garden-shrub page, not a wild-diet page. Woods browse is on what deer eat. For the rest of the planting list, use the deer-proof garden guide.
What a landscape forsythia actually is
Iowa State: named for William Forsyth, an 18th-century Scottish horticulturist. Native to China, Korea, and Europe — not a Midwest woodland shrub. The parking-strip hedge is almost always border forsythia (Forsythia × intermedia), a hybrid of weeping forsythia (F. suspensa) and greenstem forsythia (F. viridissima). NC State: 8 to 10 feet tall, 10 to 12 feet wide, zones 5–8, four-petaled yellow bells on last year’s wood before the leaves. Full sun. Wet feet kill it. Prune oldest stems right after flowering; prune after mid-July and you cut next April’s show.
That old-wood habit is the forsythia fact. Bigleaf hydrangeas have the same calendar. Eat or freeze the buds and the shrub lives. The yellow does not.
What deer eat, and when
A deer has no upper incisors, so it grabs a twig or a cluster of swelling buds and tears. After a raid you get ragged stubs from about a foot off the ground to four or five feet, not a clean 45-degree rabbit clip. Minnesota Extension: deer damage looks rough or shredded.
- Leaves and new shoots. Soft April–May growth on a one-gallon plant is the snack. Mature, slightly coarse summer foliage is why Iowa’s compiled list keeps the genus in seldom damaged. NC State still files white-tailed deer as an “other problem” on border forsythia and uses the word occasionally.
- Flower buds on old wood. This is the raid that looks like “my forsythia died.” The canes are there. March is green. There are no bells. Cornell’s extra mark against border forsythia is this window, not a summer salad.
- Winter, but not like yew. Forsythia is deciduous. When yew, American arborvitae, and evergreen azaleas are the only green at chest height, this shrub is brown sticks. That is why it skips the January column those three live in. A hungry doe will still sample buds if the circuit already includes your foundation.
Raids track the dawn and dusk windows on when deer feed. A white-tailed deer in a New Jersey or Pennsylvania suburb is the browser on every list cited here. Pest-level yards: deer as pests.
The “no bloom” trap is usually winter, not deer
Iowa State’s forsythia culture sheet (last reviewed March 2024) is the page most gardeners need before they buy a cage. Flowers last 10 to 14 days in early to mid-April in Iowa. They form only on the previous year’s growth. The flower buds on ‘Lynwood Gold’ and ‘Spring Glory’ are hardy to about −10°F. Most of Iowa goes colder than that, so those two often fail to bloom even with no deer on the property.
The classic symptom — yellow only on the lowest branches — is snow cover insulating those buds, not a browse line. Iowa says so in plain language. Wisconsin horticulture puts the kill threshold around −5°F for non-hardy cultivars. If the torn twig ends and hoof prints are missing, stop spraying egg solids on a hardiness problem.
Bud-hardy cultivars that actually belong in the Upper Midwest: ‘Northern Sun’ (University of Minnesota, 1982; Minnesota Hardy: −30°F, about 10 feet — the plant on Minnesota’s deer-resistant table); ‘Meadowlark’ (North Dakota State and South Dakota State with the Arnold Arboretum; Iowa: blooms after −30°F, 8 to 10 feet; Cornell’s forsythia sheet cites buds surviving −35°F); ‘Sunrise’ (Iowa State introduction, buds to −20°F, compact at about 5 feet); ‘Northern Gold’ (Canadian, 6 to 8 feet). Gold Tide® stays 2 to 3 feet with buds hardy to −15°F. ‘Bronxensis’ is an 18- to 24-inch groundcover whose buds die at −10°F. None of those numbers is a deer rating. They are why a “deer-resistant forsythia” can still fail in March.
Deer vs rabbit vs antler rub vs a late freeze
- Deer. Ragged, torn twig ends. Browse from a foot up to chest height. Flower buds missing on last year’s wood. Hoof prints and pellet piles. A whole face of a young hedge can go in a few nights.
- Rabbit. A neat 45-degree cut within 18 inches of the ground or the snow line. Hardware cloth at the soil line stops rabbits. It does not stop a deer that reaches over it. Toolkit: how to keep rabbits from eating plants.
- Antler rub. Minnesota: bucks shred bark of small woody plants in fall even when they are not browsing. A pencil-to-thumb-thick forsythia cane on a travel lane is a convenient post. A welded-wire cylinder August–December is the tool, not a repellent.
- Winter bud kill. Canes intact, buds dead above the snow line, no shredded ends. That is ‘Lynwood Gold’ in Iowa, not a doe.
Where it is worst
High-density eastern suburbs — New Jersey, Pennsylvania, New York, Maryland — are where Rutgers and Cornell built the lists, and where Cornell’s extra mark on border forsythia matters. Upper Midwest yards have a different failure: a zone-5 hybrid that only blooms at the snow line. UGA Circular 985 does not put the genus on either Georgia table; do not invent a rating. If the same dusk circuit already strips hostas in June and roses all season, cage a new forsythia for two winters. Iowa’s seldom-damaged column assumes other food exists.
What actually works
Match the cultivar to winter, then fence the plants deer actually prefer. Forsythia is the backdrop, not the fence. Buy ‘Northern Sun’, ‘Meadowlark’, or ‘Sunrise’ in the Upper Midwest; accept Cornell’s occasional-browse mark on border forsythia in zones 6–8. Cage a new shrub two winters — Minnesota wants cylinders at least 6 feet taller than snow. Minnesota Extension: woven-wire needs to be at least 8 feet tall for a larger area. A 4-foot picket is a step. Deer clear that without thinking. Layout: how to keep deer out of garden beds. Egg- or capsaicin-based sprays belong on hostas and roses, not on a mature forsythia they already walk past — see which organic repellents hold up.
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What does not work
A tag that says “deer-resistant forsythia” is selling the genus rating, not a pass for ‘Lynwood Gold’ in Minnesota or for an uncaged gallon on a travel route. Surrounding forsythia with lavender does not hide the hosta bed. Irish Spring, hair, and dryer sheets are the untested bucket UGA already calls unreliable. Shearing into a tight box after mid-July is how you cancel next year’s bloom yourself. Cost comparisons: how to keep deer from eating plants.
Plant these instead
If the point is early yellow deer will leave alone, daffodils are the honest March color — Rutgers-class rarely damaged, lycorine, not a shrub. If the point is a living screen, use deer-resistant hedges (boxwood, Chinese juniper, Japanese pieris, inkberry, eastern red cedar). More options: deer-resistant shrubs. Summer bloom they skip: lavender and peonies. Flower shortlist: what flowers deer do not eat.
Related plants in the same yard
Hostas go first in a mixed bed. Hydrangeas share the old-wood bloom problem and rate worse. Evergreen azaleas, yew, and arborvitae take the winter shift forsythia skips because it is leafless. Roses sit in Iowa’s frequently-damaged woody column. Fence those. Do not add an unprotected ‘Lynwood Gold’ and call the hedge a deer plan.
Common questions
Will forsythia grow back after deer eat it?
Usually the plant lives. NC State notes it is pruning-tolerant. Iowa: cut an old shrub to 3 to 4 inches in late winter and it should bloom again in one or two years. You still lose that spring’s flower if last year’s buds were the meal.
Are any forsythia cultivars deer-proof?
No. Minnesota lists ‘Northern Sun’ as deer-resistant — useful, not a guarantee. Cornell’s split is the honest one: the genus is seldom severely damaged; border forsythia is occasionally damaged. Gold Tide, Lynwood, and Sunrise are sizes and bud hardiness, not chemistry.
Why did only the bottom of my forsythia bloom?
Iowa State: the lower branches were under snow. The upper flower buds of a non-hardy cultivar died. That is not a browse line unless the remaining stubs are shredded and there are tracks. Switch to ‘Meadowlark’, ‘Northern Sun’, or ‘Sunrise’ if you garden where winters drop below −10°F.
Will a 4-foot fence save a forsythia hedge?
No, not as a yard fence, and you probably do not need a fence for the forsythia. Eight feet is the extension-service number for a real enclosure around hostas, roses, and yew. A cage around a new shrub works because the deer cannot get its head in. A 4-foot hardware-cloth ring is for rabbits.
Sources
- Iowa State Extension — Susceptibility of Plants to Deer Damage (compiled from Rutgers, Cornell, Michigan State; last reviewed July 2022)
- Iowa State Extension — Growing Forsythias in the Home Landscape (last reviewed March 2024)
- Cornell Cooperative Extension — Deer-Resistant Plants (forsythia: seldom severely damaged woody; border forsythia: occasionally damaged)
- NC State Extension Gardener Plant Toolbox — Forsythia × intermedia
- University of Minnesota Extension — White-tailed deer damage (‘Northern Sun’ on the resistant table)
- University of Minnesota Hardy — Shrubs (‘Northern Sun’, released 1982, hardy to −30°F)
- Rutgers Cooperative Extension — Landscape Plants Rated by Deer Resistance
- UGA Extension Circular 985 — Deer-Tolerant Ornamental Plants (genus not listed in either column)
- University of Wisconsin Horticulture — Forsythia (bud-kill threshold and hardy cultivars)
Part of the Deer-Proof Garden Guide. Wild diet lives on what deer eat.
