How long does cauliflower last in the fridge?

The realistic range: a whole, unwashed head of cauliflower keeps for around one to two weeks in the fridge, loosely wrapped and stored toward the back rather than in the door. Cut into florets, that window drops to somewhere between three and five days. Cooked cauliflower follows the same three-to-four day window as most other cooked leftovers. What actually trips people up is not the timeline, though — it is that cauliflower does not age the way its closest relative, broccoli, does. Broccoli turns yellow. Cauliflower turns brown, and for a specific reason that has nothing to do with your fridge.

Same flower head, different colour, for a reason that starts in the field

Cauliflower and broccoli are, botanically, close enough to be the same species grown differently — both are dense clusters of unopened flower buds from the plant family that also gives us cabbage and kale. Broccoli is left to develop its green colour in full sun, which means it is loaded with chlorophyll. Cauliflower, by contrast, is deliberately shielded from the sun while it grows: farmers, or the plant's own outer leaves, fold over the head in a practice called blanching, which keeps chlorophyll from ever forming in the first place. That is the entire reason cauliflower is white rather than green. It also means cauliflower has almost no chlorophyll left to break down as it ages, so it never really goes through broccoli's yellowing stage. What it does instead is develop brown flecking and, eventually, soft brown patches — a different process, driven by the curds bruising and oxidising rather than losing green pigment.

Ethylene again — the same rule as broccoli

Being close relatives, cauliflower shares broccoli's sensitivity to ethylene, the gas apples, bananas, pears and ripening tomatoes give off as they age. A head stored near the fruit bowl picks up brown speckling days before it otherwise would, for the same reason a broccoli head does. It is a small habit — a separate drawer, or just not stacking the head directly against the fruit — but it buys back real days on a vegetable that does not have many to spare once it starts turning.

What actually decides how long a given head lasts

Whole beats cut, and the gap is large. An intact head, especially one with its outer leaves still wrapped around the curds, has very little cut surface exposed to air. Breaking it into florets ahead of time multiplies that exposed surface many times over, which is why pre-cut florets from the shop are already living on a shorter clock than a whole head bought the same day.

Moisture sitting in the crevices is the actual enemy. A cauliflower head is not smooth — it is made of hundreds of small curds with gaps between them, and water that gets trapped in those gaps, whether from washing before storing or from condensation in a sealed bag, sits there and encourages exactly the soft brown rot that ends a head early. Storing it unwashed, wrapped loosely in a paper towel or its own perforated bag rather than sealed airtight, gives that moisture somewhere to go.

The leaves are doing a job — leave them on. If a head still has its outer leaves attached, they are acting as a physical buffer for the curds underneath. Trimming them off before storing removes that protection for no real benefit.

Brown speckling is not the same problem as soft, slimy or grey-black

Light brown speckling across the curds, sometimes called bronzing, is largely a cosmetic and textural change rather than a safety one — it is the same kind of enzymatic browning that happens to a cut apple, and plenty of people simply trim the speckled surface off and cook the rest, especially in a dish where it will be roasted or mashed. What is actually worth acting on is different: patches that have gone properly soft and wet rather than just discoloured, a grey or black cast rather than brown, fuzzy mould growth, or a smell that has moved from cauliflower's normal mild, faintly cabbage-like smell into something sharp and unmistakably off. Those are the signs worth trusting over the calendar.

What actually helps

• Buy it whole, cut it just before cooking. Pre-cut florets are already several days into their shorter window before they reach your fridge.
• Keep it away from apples, bananas, pears and ripening tomatoes. Ethylene is behind most of the early browning that gets blamed on the fridge.
• Do not wash it before storing. Water trapped in the curd crevices is what actually starts the soft brown rot.
• Store loosely, not sealed airtight. A paper towel and a bag that is not fully closed manage moisture without trapping it against the head.
• Treat cooked cauliflower like any other cooked leftover. Cooking slows the clock; it does not reset it.

A cauliflower head is also an easy thing to lose track of, because it can look perfectly white from a glance into the crisper right up until the week it is not. Munch logs each item with the day it went into the fridge and where it is stored, visible to everyone in the household, so a head with a few days left shows up on the same list as everything else — instead of depending on whoever put it away still remembering it is there.