Only situations with a published figure are listed. A blank isn't “forever” — it means no reliable number is published for it.
Storage
Store at: Cool, dry pantry, sealed — refrigerating after opening is optional and mainly preserves quality
Refrigerate after opening: Optional — mainly for quality, not safety
USDA FoodKeeper v128 tip (pantry storage): The (roasted) seeds will become rancid if stored at room temperature for long periods of time.
How to tell if Sunflower seeds (roasted, no shell) has gone bad
A rancid, paint-like, or musty smell
Bulging, leaking, deeply dented, or rusted cans
Insects or webbing in dry goods
Mould or discoloration
USDA FoodKeeper v128 publishes no spoilage note for Sunflower seeds (roasted, no shell) specifically, so these are the general signs for pantry staples — never taste something to test it. When in doubt, throw it out.
Air and warmth are what shorten an opened item's life — the right container buys back the days the packaging gives up once the seal's broken.
How long do Sunflower seeds (roasted, no shell) last after opening?
About 7–8 months refrigerated at 40°F (4°C) or below, according to USDA FoodKeeper v128.
Do Sunflower seeds (roasted, no shell) need to be refrigerated after opening?
Sunflower seeds (roasted, no shell) are shelf-stable at room temperature: cool, dry pantry, sealed — refrigerating after opening is optional and mainly preserves quality. Refrigerating it mainly preserves quality rather than safety.
How can you tell if Sunflower seeds (roasted, no shell) are bad?
Look for: A rancid, paint-like, or musty smell; Bulging, leaking, deeply dented, or rusted cans; Insects or webbing in dry goods; Mould or discoloration. Those are the general signs for pantry staples — USDA FoodKeeper v128 publishes no spoilage note for Sunflower seeds (roasted, no shell) specifically. Never taste something to test it — when in doubt, throw it out.