Updated on September 7, 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 packet of seed as “deer-proof.”
Yes. Garden sunflowers are a frequent deer target, especially as seedlings. Iowa State files annual sunflower (Helianthus annuus) under annuals frequently severely damaged — the same worst-case annual column as stock. Rutgers rates Helianthus sp. C, occasionally severely damaged. Cornell Westchester’s Master Gardener survey put common sunflower in the “occasionally eaten” annuals. UGA Circular 1121 and Minnesota Extension both warn that once deer find a row, they destroy young plants quickly. That is not hosta-level candy in every suburb. It is not a marigold either.
This page is the sunflower answer. Shade-bed favorites are hostas. Late color in the same “will eat” tier is dahlias and mums. The vegetable row that pulls the same herd is tomatoes. For the rest of the yard, start at the deer-proof garden hub and what do deer eat.
| Plant | Garden / annual sunflower (Helianthus annuus). Native North American annual. Oil-seed, confection, dwarf, and giant cultivars. Perennial Helianthus is a different rating — see below. |
|---|---|
| Verdict | Will eat. Protect seedlings in any deer suburb. Tall plants are not a free pass; deer snap stalks to reach heads. |
| University rating | Iowa State: frequently severely damaged (annual list, last reviewed July 2022). Rutgers: C, occasionally severely damaged. Cornell Westchester: occasionally eaten. UGA C1121 and Minnesota: deer destroy young plants quickly. |
| What they eat, when | Seedlings and growing tips from emergence through knee height. Leaves all season. Filling seed heads in late summer. Spilled birdseed year-round. Dawn and dusk raids match deer feeding times. |
| Where it is worst | Unfenced rows at the property edge in Iowa and the Dakotas; high-density suburban herds in New Jersey, Pennsylvania, New York, and Michigan. Dwarf cultivars sit entirely inside a standing deer’s browse zone. |
| Official plant sheet | UGA Circular 1121 · Minnesota Extension — Sunflowers · Rutgers deer-resistance list |
What a garden sunflower actually is
Minnesota Extension’s culture sheet (reviewed 2026): Helianthus annuus is an annual, native to North America, grown here more than a thousand years for seed, oil, dye, and ornament. There is no crown to store. If a deer takes the growing tip of a single-stem ‘Mammoth Russian’ in June, that stalk does not become a 10-foot September head.
UGA Circular 1121 (Bob Westerfield, full review July 13, 2022) is the Southern calendar: soil at least 60 °F, several weeks after last frost — March in south Georgia, the beginning of May in north Georgia. Plant 1 to 2 inches deep, 6 inches apart, then thin to 12 to 15 inches. pH 6.0 to 6.8. Germination is 7 to 10 days. That first week the plant is a 2-inch salad at nose height. Minnesota splits height into dwarf (3 feet or less: ‘Teddy Bear’, ‘Sunspot’, ‘Ms. Mars’), semi-dwarf (3 to 8 feet), and giant (8 feet or more: ‘Mammoth Russian’, ‘American Giant’, ‘Cyclops’). A dwarf never leaves the browse zone. A giant may put its head above a deer’s chin; the leaves stay in reach, and a leaning deer snaps the stalk. UGA’s oil-seed note: black Peredovik types are planted for birds and mammals because the seed is oil-rich. That is why a backyard packet and a bird feeder teach the same white-tailed deer that your yard is a dusk stop.
What they eat, and when
Three windows. Emergence is the worst. UGA: “If deer locate your sunflowers, they can destroy the young, developing plants quickly.” Minnesota uses the same sentence. A doe can top a 20-foot row of six-inch seedlings in one visit. In Iowa and the Dakotas that is also the crop-field window — the same herds that work beans and corn will not skip a garden strip of Helianthus. Statewide hunt context: Iowa deer hunting. Seed fill is next. UGA’s harvest cue is the back of the head turning from green to yellow-brown, the head nodding — oil and protein at chest height. Deer stretch, lean, and break stalks. The third window is the feeder. Spilled black-oil seed is a nightly salt lick that then finds the vegetable garden and the pumpkins. An Iowa SARE vineyard trial (FNC21-1314) lost its entire sunflower crop to deer in year one while using the plants as a bird trap crop for grapes. Do not plant a “sacrificial” row.
Deer damage vs rabbits vs birds vs squirrels
Deer leave a torn, shredded stub. Minnesota Extension: no upper incisors, so they grasp and rip. Past the seedling stage the damage sits 2 to 5 feet up, with pellet groups and split-heart hoof prints. A whole row of growing tips gone overnight is deer. A snapped 7-foot stalk with the head on the ground is deer.
Rabbits leave a clean 45-degree cut within a foot of the ground. If only the lowest leaves are gone and the growing tip is intact, see how to keep rabbits out of the garden. Hardware cloth at the soil line stops rabbits. It does not stop a deer that reaches over it.
Birds and squirrels work the ripe head in daylight, a few seeds at a time, and leave the stalk standing. UGA: cut heads with a foot of stem and hang them indoors if you want the seed. Squirrels in the rest of the garden: how to keep squirrels out of your garden. Leaf-footed bugs, stink bugs, and aphids mark leaves without tearing the stalk — an insect sheet, not a fence problem.
Where the ratings disagree
Rutgers built its list with northern New Jersey Master Gardeners. A C rating there means fence or spray. Iowa State, compiling Rutgers, Cornell, and Michigan State (last reviewed July 2022), puts annual sunflower in the frequently damaged annuals. Cornell Westchester was milder: occasionally eaten. Mexican sunflower (Tithonia rotundifolia) landed in Cornell’s “often eaten” annuals — do not swap to Tithonia thinking it is safer.
Perennial Helianthus is the plant lists keep mixing in. UGA Circular 985 files “perennial sunflower” among plants deer rarely browse. Oklahoma State HLA-6427 files Helianthus spp. among frequently damaged perennial flowers. Swamp sunflower and Maximilian sunflower are not ‘Sunspot’. If a planting list files annual sunflowers next to marigolds as deer-resistant annuals, that list is mixing two plants. Iowa’s frequently-damaged annual column is the one that matches a backyard packet of H. annuus.
Sunflowers have no lycorine like daffodils, no lavender-level scent, and no fuzzy leaf like bedding geraniums. A well-fed rural deer may walk past a coarse 8-foot stalk in August. A suburban doe with fawns will not walk past ‘Teddy Bear’ in June.
What works
Physical exclusion is the only near-certain fix where Iowa calls them frequently damaged. Minnesota’s woven-wire standard for a whole bed is at least 8 feet. A 4-foot decorative fence around a 6-foot sunflower is theater — how high a deer can jump is why. For a short row, a welded-wire cylinder taller than the bloom, staked so a deer cannot crush it, is enough. Put the cage on at planting. UGA already wants the row thinned to 12 to 15 inches; adding a cage then costs less than reseeding in July.
Find 8-foot deer fence on Amazon Amazon associate tag checkcheck-20. We may earn a commission.
Protect the seedling stage even if you plan to let giants grow. Row cover or cloches for the first three weeks is the cheap cage. Put the bed against the house, inside a fenced vegetable garden, or in large pots on a deck. Start egg-based or hot-pepper repellents before emergence, rotate formulas, and respray after rain. Once a bed is a known dusk stop, spray alone rarely holds. Bottles: organic deer repellent. Whole-yard tactics: how to keep deer out of garden beds. Bigger plots: how farmers keep deer off crops.
Find deer repellent on Amazon Amazon associate tag checkcheck-20. We may earn a commission.
Find plant cages on Amazon Amazon associate tag checkcheck-20. We may earn a commission.
What does not work
A tag that says “deer-resistant sunflower.” No sourced university list rates ‘Mammoth Russian’, ‘Teddy Bear’, or pollenless cut-flower types as safer. Height is physics, not chemistry. Surrounding sunflowers with sage or lavender helps only if the sunflowers are also caged. Dryer sheets, soap, hair, and a single motion light buy days. A bird feeder of black-oil seed is an invitation, not a decoy. Feeding the herd trains them to your property — what to feed backyard deer is the page that says don’t.
Three substitutes that already earn their keep
If you want late-summer yellow without feeding the herd, swap the exposed row:
- Marigolds — Iowa files them under annuals seldom damaged. Strong scent, full sun. See also deer-resistant annuals.
- Salvia — same Iowa “seldom damaged” annual column. Spikes instead of a dinnerplate head.
- Geraniums (bedding Pelargonium) — fuzzy leaf and sharp smell; the garden hub rates them rarely eaten. Use them in pots on a deck.
Daffodils cover spring. Lavender and peonies cover the perennial slot. See also what flowers deer do not eat and deer-resistant perennials.
Related plants in the same yard
If deer found the sunflowers, they have already walked the sunny strip. Hostas go first in shade. Dahlias and mums get hit in the same late-summer window as filling heads. Iowa’s frequently-damaged vegetables — beans, lettuce, sweet corn, strawberries, carrots — pull the herd into the same fence line. Layout: how to keep deer from eating plants.
FAQ
Will sunflowers grow back after deer eat them?
A seedling topped above several healthy leaf pairs will often branch, especially on branching types Minnesota lists (‘Sonja’, ‘The Joker’, ‘Teddy Bear’). The plant is usually shorter with smaller heads. A seedling eaten to the ground usually will not return. Once a deer eats the developing seed head on a single-stem giant, that stalk is done. There is no tuber. Reseed.
Do deer eat sunflower seeds from bird feeders?
Yes. UGA notes that oil-seed types — black Peredovik in particular — are planted because birds and mammals are highly attracted to the oil. Spilled seed on a patio is an overnight vacuum. Bring feeders in at night, or clean the spill, if the rest of the garden is what you want to keep.
Are tall or “mammoth” sunflowers deer-resistant?
Not as seedlings, and not reliably as adults. Minnesota’s giants are 8 feet or more. The head can sit above a comfortable browse line; the leaves do not, and a leaning deer will snap a fibrous stalk. Dwarf types have no height advantage. Protect the plant, not the catalog name.
Are perennial sunflowers safer than annuals?
Sometimes, on some lists. UGA files perennial Helianthus as rarely browsed. Oklahoma files the genus as frequently damaged. Cornell’s “occasionally eaten” rating is for H. annuus, the annual. Do not buy a Maximilian sunflower as a substitute for a fenced cutting row. If your street already loses hostas, treat any Helianthus as unprotected food until you see otherwise.
Sources
- Iowa State Extension — Susceptibility of plants to deer damage (last reviewed July 2022)
- Rutgers NJAES — Landscape plants rated by deer resistance
- Cornell Cooperative Extension Westchester deer-resistance survey
- UGA Extension Circular 1121 — Growing sunflowers in the home garden (full review July 13, 2022)
- UGA Circular 985 — Deer-tolerant ornamental plants
- University of Minnesota Extension — Sunflowers (reviewed 2026)
- University of Minnesota Extension — White-tailed deer damage
- SARE FNC21-1314 — Iowa vineyard sunflower trial
- Oklahoma State HLA-6427 — Ornamental and garden plants: controlling deer damage
This is a child of the deer-proof garden guide. Wild browse, not a packet of ‘Mammoth Russian’, is on what deer eat.
