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Best Bird Seed for Cardinals: What Sources Recommend
Cardinals are not fussy, but a few seeds come up again and again in expert and retailer guidance. This guide compares what Cornell Lab’s All About Birds, Wild Bird Scoop and Birdfy say about safflower, sunflower, peanuts and other foods, and flags where they disagree. It ranks seed types, not brands, because none of the sources we read recommends a specific seed product.
By The Bird Feeder Guide Editorial Team · Specs verified October 2026 · Updated October 2026
Disclosure: As an Amazon Associate we earn from qualifying purchases. The Amazon link below is a search link and we show no price because prices change.
How this guide was made: research-based from the cited sources, compiled with AI assistance and reviewed by the editorial team. We did not hands-on test any seed.
Quick answer
Start with safflower and sunflower. All About Birds calls safflower “a favorite among cardinals,” and its Northern Cardinal page says cardinals “particularly seem to use sunflower seeds.” Offer them in a tray or hopper feeder, which All About Birds says cardinals and grosbeaks tend to prefer. Skip mixes padded with red millet, oats and other fillers. Sources disagree about cracked corn and raw peanuts, so we explain both sides below.
How we chose and ranked
We did not test any seed. We read four pages: the All About Birds seed guide (Cornell Lab; no date shown, page footer 2026), the All About Birds Northern Cardinal page (no date shown), Wild Bird Scoop by Jacob Swanson (published July 21, 2022, updated January 15, 2024) and Birdfy’s cardinal seed guide (January 14, 2025). Birdfy sells bird feeders and cameras, and Wild Bird Scoop carries affiliate links, so we gave the Cornell Lab pages the most weight. A seed ranks higher when more sources name cardinals as eaters of it and when no source warns against it. We show “Not stated” where a source is silent.
Seed types compared
| Seed or food | What the sources state | Source |
|---|---|---|
| Safflower | “A favorite among cardinals”; best in tray or hopper feeders. Birdfy says cardinals “adore” it and that squirrels shy away from it (Birdfy only). | All About Birds, Wild Bird Scoop, Birdfy |
| Black oil sunflower | Thin shells; attracts the widest variety of birds. Birdfy calls it among the best-liked seeds for cardinals. | All About Birds, Birdfy |
| Striped sunflower | Thicker shell that is harder for House Sparrows and blackbirds to crack (All About Birds). Wild Bird Scoop says cardinals have no strong preference between black oil and striped. | All About Birds, Wild Bird Scoop |
| Hulled sunflower | Birdfy says cardinals like it. Not stated by the other sources. | Birdfy |
| Peanuts | Wild Bird Scoop: cardinals prefer shelled, and buy roasted peanuts made for birds because raw can be toxic. Birdfy: fresh, mold-free raw peanuts are not poisonous; avoid salted or flavored. All About Birds does not name cardinals. | Wild Bird Scoop, Birdfy |
| White proso millet | All About Birds lists cardinals among ground feeders that like it, but says to avoid millet where House Sparrows and blackbirds are present. Wild Bird Scoop calls white millet a filler. | All About Birds, Wild Bird Scoop |
| Cracked corn | All About Birds says cardinals eat corn but that it is the food most likely to carry aflatoxins. Birdfy recommends cracked corn for cardinals. | All About Birds, Birdfy |
| Fruit, suet cakes, dried mealworms | Named as extras by Wild Bird Scoop; Birdfy names fruit and mealworms. | Wild Bird Scoop, Birdfy |
| Mixes with red millet, oats, fillers | “Not attractive to most birds”; read the ingredient list and avoid these seeds. | All About Birds |
Specs verified October 2026 against the pages listed under Sources. No source gives prices or names a recommended brand, so we list none.
Which seed fits you
Safflower
Who it is for: anyone starting out, since it is the seed All About Birds singles out for cardinals.
Who should skip it: nobody in particular; the sources raise no concerns. Offer it in a tray or hopper feeder.
Black oil or striped sunflower
Who it is for: people who want one seed that suits many birds. Choose striped if House Sparrows or blackbirds are a problem (All About Birds).
Who should skip it: readers who want a seed aimed only at cardinals.
Shelled, unsalted bird peanuts
Who it is for: feeders who want to add variety, using peanuts sold for birds.
Who should skip it: anyone unsure of the supplier, since sources disagree on raw peanuts.
Cracked corn and millet
Who it is for: cautious occasional use only if you accept the stated risks.
Who should skip it: anyone worried about aflatoxins or with House Sparrows and blackbirds around.
Compare feeders in Best Bird Feeders for Cardinals and see our parent guide Best Bird Seed: What to Feed Wild Birds.
Where the sources disagree
Three disagreements matter. On corn, All About Birds warns about aflatoxin contamination while Birdfy recommends cracked corn. On raw peanuts, Wild Bird Scoop calls them potentially toxic while Birdfy says fresh, mold-free raw peanuts are fine. On millet, All About Birds says cardinals eat it but advises against it where House Sparrows and blackbirds gather, while Wild Bird Scoop treats white millet as filler. We lean on the Cornell Lab guidance and suggest unsalted peanuts sold for birds if you try them.
Limits and missing data
The All About Birds seed guide shows no author or publication date. None of the pages we read names a tested seed brand, states a price, or reports a trial of one seed against another. Two sources are from companies that sell related products. Bird behavior varies by region and season, so treat this as a starting point and watch what your own cardinals take.
Questions about bird seed for cardinals
What is the best seed for cardinals?
Safflower and sunflower are the most consistently named. All About Birds calls safflower a favorite among cardinals and says cardinals particularly seem to use sunflower seeds.
Do cardinals prefer black oil or striped sunflower?
Wild Bird Scoop says cardinals have no strong preference between the two. All About Birds notes striped sunflower has a thicker shell that is harder for House Sparrows and blackbirds to crack.
What feeder should I use?
All About Birds says cardinals and grosbeaks tend to prefer tray and hopper feeders, and Wild Bird Scoop recommends a large, stable platform or tray feeder.
Which mixes should I avoid?
All About Birds says mixes with red millet, oats and other fillers are not attractive to most birds, so check the ingredient list.
Related guides
Best Bird Seed: What to Feed Wild Birds
Best Bird Feeders for Cardinals
How to Attract Cardinals
Feeding Birds in Winter
Sources and method
Specs verified October 2026. This guide is research-based from the sources below, compiled with AI assistance and reviewed by the editorial team, with no hands-on testing.
All About Birds (Cornell Lab), Feeding Birds: a Quick Guide to Seed Types (no date shown)
All About Birds (Cornell Lab), Northern Cardinal Backyard Tips (no date shown)
Wild Bird Scoop, The Best Bird Seed for Cardinals (updated January 15, 2024)
Birdfy, The Ultimate Guide To Cardinal Bird Seeds (January 14, 2025)