How Long Does Lettuce Last?

Gregory Stewart

Updated on October 23, 2026

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How long does lettuce last? Plan on about a week in the fridge for a whole head of romaine, butterhead or iceberg (University of Minnesota Extension gives one week; Real Simple says up to 10 days for iceberg). Loose leaves and chopped lettuce last fewer days, and bagged salad runs on its use-by date, not on how it looks. On the counter, lettuce is a matter of hours to a day or two. The gap between “4 days” and “2 weeks” comes down to temperature, moisture, whether it was cut up, and how close it sat to the fruit bowl.

Why the same head lasts a week for one person and two for another

• Temperature. UC Davis puts romaine at about 21 days at 32°F and about 14 days at 41°F, if no ethylene is around. Respiration, the rate at which the leaf burns through itself, is 8–12 mL CO₂ per kg per hour at 41°F and 30–38 at 68°F, about three times higher. UMN Extension says shelf life shortens by up to 25 percent for every 10°F the storage temperature rises, and that 32°F is not easy to reach at home. The FDA asks for a fridge at 40°F or below, and a refrigerator thermometer is how you check that. Those UC Davis numbers describe freshly harvested lettuce in a cold chain; a head that was already days old at the store will not match them, which is my caution, not theirs.
• Moisture, in both directions. Lettuce wilts when it loses water, fastest in warm, dry air (UC Davis; a thin plastic bag reduces the loss). It rots when it sits wet. UMN Extension says perforated bags give a cold, moist environment for a moderate time, while unperforated bags often create condensation and mold.
• Whole or cut. Oklahoma State Extension says whole heads stay fresher longer than leaves or chopped pieces. UC Davis adds that cutting raises ethylene production and cut surfaces brown.
• Bruising. Mechanical injury speeds respiration, raises infection risk and shortens storage life (UC Davis). Rough handling on the way home counts.

Keep lettuce away from apples, pears and bananas

UC Davis calls lettuce highly sensitive to ethylene: as little as 1 ppm causes brown spots, mostly on the midribs, and raises the risk of disease. It names ethylene-producing fruit such as apples and pears as a source; Illinois Extension names apples, pears and bananas and says the lettuce develops brown spots and decays quickly. UC Davis describes the spotting itself (“russet spotting”) as strictly cosmetic, so brown midrib spots without slime are a quality problem. Practically: give the lettuce its own drawer or a spot away from the fruit. That placement is my suggestion based on those sources.

Paper towel, bag, wash first? Where the sources split

This is where storage advice contradicts itself, so here is who says what:

• Don’t wash before storing. Real Simple says not to wash lettuce before storing, and to keep folded paper towels in the container, replacing damp ones. Allrecipes’ writer reports that leaving store lettuce in its original container in the crisper beat both a paper-towel container and a wash-and-spin method, which was the worst. That is one writer, one trial, no counts.
• If you wash, dry it, and use dry towels. Oklahoma State Extension says to wash lettuce just before using, and if you wash it ahead, to dry it completely and line the container with dry paper towels, because moist towels add moisture that promotes spoilage and microbial growth. Illinois Extension is of two minds: one section says wash, drip dry and bag it, another says wrap unwashed leaves for a few days.
• The damp-towel roll. A garden blogger (BloominThyme) washes, semi-dries, rolls leaves in damp paper towels in a bag, and reports 10 days. That is her report, not a test, and it contradicts Oklahoma State.

The routine I’d use: store lettuce unwashed, with outer damaged leaves removed and a dry towel in a perforated bag or a container that is not packed tight, in the crisper. Wash what you will eat, right before eating. Washing ahead only makes sense for gritty garden leaves, and then dry them fully (a salad spinner or a towel) and eat within a couple of days. If a drawer or shelf freezes things, keep lettuce out of it: UC Davis says freezing injury starts below about 31.7°F and shows as water-soaked patches that turn slimy. The same dry-storage logic applies to berries; see how long blueberries last. A vented lettuce keeper container does the same job as a perforated bag.

Bagged and pre-cut lettuce: the date and the temperature matter, not the look

Cut leafy greens are handled as temperature-controlled foods. FDA retail guidance says refrigeration at 41°F or less prevents growth of pathogens that may be present, and that the anticipated shelf life of many bagged, fresh-cut greens is about 12–16 days. It also says sensory quality often lasts a week or more past the sell-by or use-by date, and that pathogens can grow at abuse temperatures while greens still look acceptable. That page is written for food establishments and dated 2022, so I use it for the temperature logic, not as a home rule. USDA ARS adds that above 45°F E. coli O157:H7 can multiply 10- to 100-fold within a few days, and that washing contaminated bagged lettuce at home is not effective.

• Use-by date is the line. A bagged salad that looks fine past the date is not shown to be safe; buy the bag with the latest date and keep it cold on the way home (Oklahoma State, USDA ARS).
• Don’t rewash “pre-washed” or “ready-to-eat” bags. The FDA says you can use them without further washing; if you do wash, keep them off unclean surfaces.
• Liquid in the bag means toss it. Oklahoma State says juice in a bagged salad encourages bacteria to stick to the leaves and grow.

Is it spoiled, or just ugly?

Old and spoiled are not the same, and the signs overlap.

Throw it away:

• Slime. Illinois Extension: the slime is residue of bacterial decomposition, and black spots are usually mold.
• Wet, rotten patches with an unpleasant smell. UC Davis describes bacterial soft rot this way, and says the lesions can spread through the entire head. A slimy base means the head, not a trim job.
• Gray or black fuzzy spores. UC Davis: that separates fungal rot (gray mold, Botrytis) from bacterial rot.
• Water-soaked, translucent patches that turn slimy: freezing injury, which UC Davis says deteriorates quickly after thawing.

Quality problem, not by itself decay:

• Pink or red midribs and base. Pink rib is a physiological disorder of overmature heads, heads stored too long or too warm; UC Davis says it is not tied to physical damage and not caused by ethylene.
• Pink or brown on cut or torn edges. Wounding triggers phenolic compounds (UC Davis). On iceberg, browning at the cut stem butt has no relationship to head quality (UC Davis).
• Brown midrib spots, no slime. Ethylene russet spotting, cosmetic (see above).
• Dry brown leaf margins. Tipburn forms in the field; Illinois Extension says to clip off the brown tissue and use the rest.
• Limp, soft leaves. Water loss.

If pink or brown comes with slime or a sour smell, treat it as rot. The FDA says to throw away produce that looks rotten and to cut away only damaged or bruised spots on produce that is otherwise sound. USDA FSIS says soft, high-moisture produce with mold should be discarded, not trimmed; its examples are cucumbers, peaches and tomatoes, and lettuce is not named, so applying it to lettuce is my reading. Children, older adults, pregnant women and people with weakened immune systems should be more cautious (FDA).

Lettuce you cut yourself: the first hour matters

Garden lettuce skips the cold chain a store head gets, so the clock starts when you cut. I garden on about 3,500 square feet in southern California, a dry climate, which is why I take this seriously: UC Davis notes lettuce loses water fastest at high temperature and low humidity, and wilted edges soften and lose crispness.

• Cut on time. Utah State Extension says lettuce becomes bitter and tough if harvest is delayed or the crop is overmature. For when and how to cut, see how to harvest romaine lettuce.
• Shorten cut-to-cool. UC Davis says reducing the time between cutting and cooling, and storing romaine below 36°F, limits discoloration where leaves are damaged. At home, that means the fridge soon after cutting.
• Handle it little. UMN Extension: the less you handle vegetables, the longer they last.
• Wash only if you need to. The FDA says to wash all produce, including home-grown, under running water before eating. For gritty leaves, Oklahoma State suggests separating leaves and soaking them in a bowl of cold water, then a second rinse, then drying. Real Simple says clean heads can be stored like store-bought ones, and washed greens should be eaten within a couple of days.
• Seedstalk showing? Illinois Extension says seedstalks come from long days, warm temperatures and age. Harvest immediately and refrigerate. It also says bitterness often fades after a day or two in the fridge; that is their claim and I have not checked it.

Can you freeze lettuce?

Not for salad. K-State Extension lists lettuce among produce that does not freeze well because of its high water content: it becomes limp, watery and develops an oxidized color, aroma and flavor. USDA FSIS names lettuce as an example of food that does not freeze well, while noting food kept constantly at 0°F stays safe and only quality drops. Real Simple suggests puréeing leaves, freezing them in ice cube trays and adding the cubes to soups or smoothies; that is editorial advice, not extension-tested.

FAQ

How long can lettuce sit out? Not long. USDA FSIS says perishable food should not be left out of refrigeration more than 2 hours, or 1 hour if it is above 90°F. It is a general perishable-food rule, and cut or bagged lettuce is the clearest case because the FDA treats it as a temperature-controlled food. I found no USDA or extension figure for a whole head, and UC Davis says romaine starts to yellow within 1–2 days at room temperature.

Crisper drawer or a shelf? Real Simple and Oklahoma State say crisper. Illinois Extension says the coolest spot is usually the first shelf against the back wall. I’d default to the crisper in a loosely closed bag and use the thermometer to confirm it holds 40°F or below.

Does lettuce last longer standing in water? I found no extension or USDA source supporting it. The sources I read point to cold, dry-ish, ventilated storage, so treat the jar trick as unverified.

Can I trim off the bad part and eat the rest? Only for dry damage: a bruised outer leaf or dry brown edge (FDA; Illinois Extension on tipburn). If there is slime, a wet smelly patch or mold, discard the head.

Sources: UC Davis Postharvest, Lettuce (Romaine and Loose-Leaf) · UC Davis Postharvest, Lettuce (Crisphead, Iceberg) · UMN Extension, Harvesting and storing home garden vegetables · Illinois Extension, Lettuce · Oklahoma State Extension, Keeping Salad Greens Fresh · Utah State Extension, Leafy Greens Harvest and Storage · K-State, Foods that Do Not Freeze Well · FDA, Selecting and Serving Produce Safely · FDA, Temperature Control of Cut Leafy Greens (retail) · USDA ARS, Keeping Bagged Leafy Greens Safe · USDA FSIS, Danger Zone · USDA FSIS, Molds on Food · USDA FSIS, Freezing and Food Safety · Real Simple, How to Store Lettuce · Allrecipes, storage comparison · BloominThyme, garden lettuce. Not medical advice; follow USDA and FDA guidance if you are pregnant, older, or have a weakened immune system.