Last updated: August 21, 2026
A cardinal is the bird most people are actually hoping for when they hang their first feeder. It is big, it is loud, it shows up at first light and again in the last twenty minutes of daylight, and it is the one visitor that makes a gray February yard look like something. The good news is that cardinals are not fussy eaters. The reason people still miss them is almost never the food in the tube.
Cardinals are heavy, thick billed birds that like to sit down while they eat, and a lot of feeders give them nowhere to sit. This guide covers what the sources say cardinals take, what they leave behind, and what shape of feeder gets them out of the shrubs and onto the seed.
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Quick Answer
What should you feed cardinals?
- Black oil sunflower seed is the one bag that works everywhere. Cornell lists it among the seeds cardinals take at feeders.
- Safflower is the specialist pick. Cornell describes it as a cardinal favorite that many other feeder birds handle poorly.
- Striped sunflower and shelled sunflower both get eaten, and shelled seed leaves no hulls under the feeder.
- Shape matters more than brand. Cornell notes cardinals and grosbeaks tend to prefer tray and hopper feeders.
Bottom line: sunflower or safflower in something a heavy bird can stand on, placed within a short hop of cover.
What Cardinals Eat in the First Place
Northern Cardinals eat mainly seeds and fruit, supplemented with insects, and they feed their nestlings mostly insects. That description comes from the Cornell Lab of Ornithology species account, and it explains the whole feeder story: a bird that lives on seeds and fruit will take your sunflower happily, and a bird that switches to insects in the nesting weeks will sometimes go quiet in June without anything being wrong.
Cornell also lists the wild foods behind the feeder visits, including dogwood, wild grape, mulberry, hackberry, blackberry, sumac and corn. That matters when you are wondering why the pair that emptied your feeder in January now shows up twice a day. They have not left. There is simply more on offer than what you are putting out.
The Seeds That Get Taken First
Two seeds do almost all of the work. Black oil sunflower is the default because nearly every feeder bird takes it and the shell is thin enough for small birds too. Safflower is the interesting one, because Cornell describes it as a favorite of cardinals while noting its thick shell is hard for some other birds to crack.
That thick shell is the entire point of safflower. Cornell notes that seeds with thick, hard shells, striped sunflower and safflower among them, are more difficult for blackbirds to open. If a flock of grackles is emptying your feeder before the cardinals get a turn, switching a hopper over to safflower changes who can use it without you having to chase anything away.
Shelled Sunflower and the Mess Question
Hulled or shelled sunflower is the same food with the shell already removed. Cardinals take it, everything else takes it, and nothing accumulates on the ground underneath. It costs more per bag and it spoils faster once it gets wet, so it suits a deck or a patio far better than a feeder over a lawn. Our guide to no mess seed blends covers that trade in more detail.
What Cardinals Mostly Ignore
Cardinals rarely bother with nyjer, and they are not the birds emptying a thistle sock. Nyjer is a tiny seed served through tiny ports on feeders built for goldfinches and siskins, and a cardinal has neither the bill shape nor the perch space for it. Cheap mixes with a lot of filler are the other disappointment.
The fillers to look at on the label are red milo, wheat and oats. They bulk out a bag and most yard birds sort them onto the ground, where the pile turns into a wet mat and a rodent invitation. If your seed disappears fast but the ground underneath is covered in small reddish grains, you are paying to sweep. The seed table lays out which seed each species actually takes.
Where a Cardinal Wants to Stand
Cornell notes that cardinals and grosbeaks tend to prefer tray and hopper feeders, which is why they are also the sensible way to offer safflower. A cardinal is a heavy bird with a long tail, and it wants a surface it can settle on rather than a short plastic peg it has to grip while its tail hangs into the feeder body.
Tube feeders are not impossible, but the ones cardinals use have either a wide perch ring or a tray clipped under the ports. That tray does two jobs at once: it gives a big bird somewhere to stand, and it catches the seed that smaller birds flick out. Our cardinal feeder guide goes through the perch widths and tray sizes that make the difference, and the hopper, tube or platform comparison covers the shapes side by side.
Cover, Not Open Lawn
Cardinals feed early and late and they do not like being exposed. A feeder in the middle of a mown lawn gets used by nothing for weeks. Move the same feeder to within a short flight of a hedge, a brush pile or a low evergreen and the pair that has been watching from the fence line will come down within days.
Cardinal Foods at a Glance
Food choices below follow the Cornell Lab and Project FeederWatch descriptions of what cardinals take at feeders. The notes on shells and mess are the practical side of the same choice.
| Food | How cardinals treat it | Best served in | What it costs you |
|---|---|---|---|
| Black oil sunflower | Taken readily, the everyday staple | Hopper, tray, tube with a wide perch | Hulls pile up underneath |
| Safflower | A favorite, and harder for blackbirds to open | Hopper or tray, per Cornell | Some birds ignore it at first |
| Striped sunflower | Cracked easily by a thick bill | Hopper or tray | Small birds struggle with the shell |
| Shelled sunflower | Taken by everything, no cracking needed | Covered hopper or a dry tray | Spoils faster once wet |
| Nyjer | Largely ignored | Finch tubes and socks | Wrong bird entirely |
Timing: Why They Come at Dawn and Dusk
Cardinals are famously the first birds at a feeder in the morning and the last to leave in the evening, often in low light when other species have already gone to roost. If you only look out of the window at lunchtime, you can run a well stocked feeder for a month and conclude that no cardinals live nearby.
Winter changes the picture again. Cardinals gather in loose groups in the cold months, and a feeder that hosted a single pair in July can hold half a dozen birds at dusk in January. That is the season to keep the hopper full and to keep the seed dry, because wet clumped seed is what actually stops the visits.
What Usually Goes Wrong
Three problems account for most disappointed cardinal watchers: a feeder with nowhere to stand, a feeder stranded in the open, and a bag of mix that is mostly filler. Fix those three and the food question mostly answers itself, because sunflower is already in every bag on the shelf.
The fourth is hygiene, and it is the one that matters for the birds rather than for you. Seed that sits wet in a tray goes moldy, and Project FeederWatch is direct about keeping seed dry and changing it out in hot, wet weather. Our guide to cleaning a feeder covers the routine and the disease risk behind it.
Frequently Asked Questions
What is the best seed for cardinals? Black oil sunflower for everyday feeding and safflower when you want to keep blackbirds and squirrels off the same seed. Cornell describes safflower as a cardinal favorite with a shell that is hard for many other birds to open.
Do cardinals eat safflower seed? Yes. Cornell lists safflower among the seeds cardinals take, and pairs it with tray and hopper feeders because those are the shapes cardinals prefer. Some yards take a week or two to switch over to a new seed.
Will cardinals use a tube feeder? Some will, but only if there is enough perch. A tube with a wide perch ring or a tray clipped underneath works far better than a tube with short pegs, which is a design meant to exclude larger birds.
Do cardinals eat peanuts or suet? They are seed and fruit specialists rather than suet birds, and suet cages are built for woodpeckers, nuthatches and chickadees. You may see a cardinal pick at a suet cake from a tray, but it is not what brings them in.
Why did my cardinals stop coming? Usually wild food, nesting season or seed condition rather than anything you did wrong. Cornell lists a long menu of wild fruits and seeds cardinals use, and a good natural year quietly empties feeders across the neighborhood.
Do cardinals feed on the ground? Frequently, especially under a feeder that other birds are spilling from. A low tray or a clean patch of ground close to cover suits them, but keep it swept so wet seed does not build up.
The Bottom Line
Feeding cardinals is a short list: black oil sunflower as the default, safflower when you want to thin out the blackbirds, and a hopper or tray so a heavy bird has somewhere to stand. Skip the cheap mixes with milo and wheat, keep the seed dry, and set the feeder within a short flight of cover rather than out in the open. Read next: our cardinal feeder guide for the perch widths that decide it, and safflower seed for the seed that skips the squirrels and grackles.