How long doSunflower seedslast in the fridge once opened?
The USDA rates 3 kinds of this separately
The USDA files 3 separate entries under this name — raw, unsalted, no shell, roasted, no shell and roasted, salted, in shell — and gives every one of them the same window outside the freezer, 12 months. They are separate rows in the source rather than separate answers to the question.
Sealed against opened
Opening the package costs 1.5 times here: 12 months sealed in the pantry against 8 months open in the fridge. That is a real difference and worth dating the container for, but not the collapse it becomes for the more perishable items in the same list.
Every storage figure the USDA publishes for this item
The USDA gives this item a pantry and a refrigerator figure and no freezer figure at all, the pattern behind 79 of the 466 foods in the data. The source also indexes it as kernal and shell.
Sunflower seeds, raw, unsalted, no shell
- In the pantry12 months
Sunflower seeds, roasted, no shell
- Unopened · in the pantry12 months
- Once opened · in the pantry3 months to 4 months
- Once opened · in the fridge7 months to 8 months
Sunflower seeds, roasted, salted, in shell
- Unopened · in the pantryPackage use-by date
Where the USDA answers in words instead of days
1 of the nine slots the USDA keeps for this item holds an answer that is not a number, and an answer in words is still an answer: in the pantry it answers with the package date rather than a number, and the use-by date printed on that particular package is the figure to go by.
What the USDA adds in words
The USDA attaches 2 handling notes to this item, reproduced below word for word. None of them is a storage time: they qualify the figures above rather than replacing them. These are the source's own sentences, not ours, and they are the part of the FoodKeeper record that a table of durations cannot carry.
Sunflower seeds, roasted, no shell, in the pantry, from the day you bought it. The (roasted) seeds will become rancid if stored at room temperature for long periods of time.
Sunflower seeds, roasted, salted, in shell, in the pantry, from the day you bought it. The (roasted) seeds will become rancid if stored at room temperature for long periods of time.
Turning the range into a date
Each kind gets its own dated rows here, 4 rows across the 3 the USDA lists under this name, because a date is only worth printing against the window it belongs to.
Sunflower seeds, raw, unsalted, no shell
- In the pantryUse by12 months after the day you stored it
Sunflower seeds, roasted, no shell
- Unopened · in the pantryUse by12 months after the day you bought it
- Once opened · in the pantryUse by3 months to 4 months after the day you opened it
- Once opened · in the fridgeUse by7 months to 8 months after the day you opened it
Is this window about safety or about taste?
The answer at the top of this page reads 7 months to 8 months in the fridge once opened. What decides that is the food and not the shelf the source files it on: Sunflower seeds, roasted, no shell is acid, dry, sweet, alcoholic or pure fat. Past it, judge it by look and smell: this window rates how good the food will be, not the day it becomes a hazard.
Every figure assumes the food was sound when you stored it, that your refrigerator holds 40 °F or below and your freezer 0 °F or below, and that the package was handled normally.
It is past the date. Now what?
Say the calculator above puts Sunflower seeds, roasted, no shell past its 7 months to 8 months in the fridge once opened window. Past that the calendar stops deciding and the food itself does. A rancid, paint-like smell in a nut, an oil or a seed, mold around the neck of a bottle, or a swollen can mean it goes out whatever the date says.
The FoodKeeper entry this page is built from prints storage times and nothing else, so anything past them here is USDA and FSIS guidance rather than a figure from the source. The whole rule, including the cases the source does not cover, is set out under what to do when the date has passed.
Two places, and one of them is the wrong one
The USDA rates two places for Sunflower seeds, roasted, no shell in one state and they disagree: 7 months to 8 months in the fridge once opened against 3 months to 4 months in the pantry once opened. This page answers with the refrigerator, the longer of the two. Both figures are the USDA's own, so this is a choice of where to put the food rather than a disagreement about how long it keeps.
Is that a long time?
10 items in the Shelf Stable Foods list keep exactly as long as Sunflower seeds, roasted, no shell, 12 months, so they all share place 38 of 70 rather than being put in an order the data does not support.
Items that behave the same way
All 5 of the 6 items nearest Sunflower seeds, roasted, no shell keep exactly as long as it does, 12 months, so the ranking around it is a tie rather than an order.
Products the USDA rates in the same places
No other product in the file is rated in exactly this set of places: pantry, pantry from the day of purchase, pantry after opening and refrigerator after opening, and nothing else. That makes the shape of this record unique among the 466 products here, so the closest comparisons available are the entries that share most of it — Nuts, Sun dried tomatoes and Crackers. Their windows are printed beside them below, and none of them is rated in quite the same way.
Nothing carries this exact set of places, so these share most of it.
- Nuts2 months in the pantry once openedup to 1 year sealed in the pantry
- Sun dried tomatoes3 months in the fridge once openedup to 1 year sealed in the pantry
- Crackers3 months in the fridge once openedup to 8 months sealed in the pantry
- Fruits, dried6 months in the fridge once opened
- Peanut butter2 months in the pantry once openedcommercial · up to 24 months sealed in the pantry
- Tuna3 years in the pantrycanned
- Cereal2 months in the pantry once openedready-to-eat · up to 12 months sealed in the pantry
- Toaster pastries1 week in the pantry once openedup to 12 months sealed in the pantry
The rest of the Shelf Stable Foods shelf
The USDA puts this product on the Shelf Stable Foods shelf together with 69 others, and 37 of them keep longer outside the freezer. The shelf runs from Coconut cream at 5 years down to Polenta at 7 days. Nearest this product by window are Cereal, Toaster pastries and Macadamias, which is the order the list below is printed in. Across the whole of Shelf Stable Foods the same product ranks 38 of 70. The middle of the shelf is Sunflower oil, at 1 year. 5 products on this shelf publish no window outside the freezer and stay out of the order.
- Cereal12 months2 months in the pantry once opened
- Toaster pastries12 months1 week in the pantry once opened
- Macadamias12 months12 months sealed in the fridge
- Peanuts12 months12 months sealed in the fridge
- Pistachios12 months12 months sealed in the fridge
- Walnuts12 months9 months sealed in the fridge
- Dry stuffing mix12 months9 months in the pantry
- Grits12 months12 months sealed in the pantry
If it has to keep longer than this
If it has to keep longer than 12 months, the Shelf Stable Foods aisle gives 22 products that hold at least twice as long outside the freezer. The smallest step up is Peanut butter at 24 months against this one's 12 months; after it come Chocolate syrup, Molasses and Popcorn. They are printed below in the order the step gets bigger, not alphabetically. In the other direction, 15 entries in the category keep half as long or less, Fruits, dried and Cashews among them. The largest step the category offers is Sesame seeds at 5 years.
- Peanut butter24 months2 months in the pantry once opened
- Chocolate syrup2 years6 months in the fridge once opened
- Molasses2 years6 months in the pantry once opened
- Popcorn2 years1 year in the pantry once opened
- Black pepper2 years2 years sealed in the pantry
- Cajun seasoning blend2 years1 year sealed in the pantry
- Flaxseed2 years2 years sealed in the pantry
- Almond oil2 years2 years sealed in the fridge
The record this page is built from
The USDA publishes 3 separate rows under this name — records 608, 609 and 610 — and this page carries all of them rather than picking one, because their windows differ. Between them they fill 4 of the nine storage slots with a time. Comparisons and the place in the category are computed for Sunflower seeds, roasted, no shell, which is the kind the plain name means here, chosen kind by kind rather than by the order the source happens to list them in. 1 slot is answered in words instead of days, and printed as the source wrote it.
Where these numbers come from
Every range on this page is published by the USDA FoodKeeper and reproduced unchanged. The multipliers, the rankings, the percentages and the dates are ours, computed from those ranges. Where the source gives a span such as 3 to 5 weeks, comparisons use the upper figure, and the full span is always printed.
Rankings cover only the items the USDA gives a usable figure for, and identical ranges share a place rather than being ordered arbitrarily. Neighbors are chosen by nearest storage time within the same category, never alphabetically: two foods filed next to each other by name usually have nothing to do with each other. The freezer is excluded from ranking because it flattens almost everything.
Where the USDA lists several kinds under one name, they share one page here and every kind keeps its own windows: the source prints them as separate rows, and a page that merged them would be inventing a figure the source never published. Comparisons and the place in the category are computed for the kind the plain name means — the shell egg for eggs, the can for tuna — which is settled name by name rather than by the order the source lists its rows in, and the page names it. Where the plain name means no single kind, the page prints no single figure at all and lists the kinds instead.
Source: USDA FoodKeeper, retrieved 1 September 2026. This site computes every comparison on this page and takes responsibility for it. Found a figure that does not match the source? Tell us on the contact page, with the page and the row — the parsing is mechanical, so a mismatch is our bug and we want it. How the whole site is built, which figures are ours and where the source can be checked is on the method page.
USDA index terms: kernal, seed, seeds, shell, sunflower, sunflower seed
KeepsUntil is an independent reference built on public USDA data. It is not affiliated with, endorsed by, or connected to the U.S. Department of Agriculture or the Food and Drug Administration. Whether a given window is a safety limit or a quality window is stated on the page that prints it.