A good garlic bulb can keep for weeks or months, depending on how it was grown, cured and stored. But put it into a damp sealed tub and you may soon see mould between the cloves. Leave it beside a hot cooker and the flesh can shrivel. Storing garlic properly is mostly about airflow, moisture and temperature.
The advice also changes according to what you have: a fully cured whole bulb, loose peeled cloves, freshly harvested home-grown garlic or garlic already crushed into oil. Those should not be treated as interchangeable foods.
Choose sound bulbs first
Look for firm heads with dry protective outer skins and no visible mould. The cloves should not feel soft or leak when the bulb is gently handled.
A few scraps of papery skin are normal. Extensive blackened spots, wet decay or a sour smell suggest something more serious.
Don't expect storage to improve a damaged bulb. If a head is already rotting, keeping it with good bulbs risks contaminating the surrounding storage area.
Keep whole bulbs dry and ventilated
For ordinary cured whole garlic, use a mesh bag, open basket or ventilated container. A cool, dry cupboard away from the hob and sink is usually more suitable than a sealed plastic tub.
Iowa State University Extension recommends storing cured bulbs in mesh bags or open crates with good airflow. That allows moisture to escape instead of collecting against the papery skin.
Do not pile several damp bulbs into an airtight box. Moisture accumulation makes fungal growth more likely and shortens the useful life of the whole batch.
Find a suitable temperature
A cool room is generally better than a warm window ledge. Conditions in an ordinary house aren't as controlled as professional cold storage, so you may need to use garlic sooner in summer.
RHS guidance recommends keeping thoroughly cured home-grown bulbs in a cool, dry place, around 5–10°C for its gardening-storage approach. Commercial storage conditions can differ, and very cold or intermediate temperatures may affect dormancy and sprouting.
Choose a stable spot with good ventilation rather than moving garlic between a hot cooker and a freezing outdoor shed.
Don't wash the whole bulb before storing
The papery outer skin provides useful protection. For clean supermarket garlic, there is no advantage in washing the head and then putting it away damp.
For home-grown garlic, carefully brush off loose dry soil after curing according to growing guidance. Don't scrub away all the protective wrappers.
Wash hands, boards and peeled cloves appropriately when preparing food. Storage and food preparation are different steps, and dry storage does not mean ignoring kitchen hygiene.
Cure home-grown garlic before long storage
Freshly lifted garlic still contains moisture in its stems and protective skins. Curing allows those tissues to dry so bulbs store more reliably.
The RHS advises spreading harvested bulbs in a single layer in a dry well-ventilated place, usually for around two to four weeks depending on conditions. Avoid excessive heat and handle them gently.
Once the stems and wrappers are thoroughly dry, trim as appropriate and store. A bulb harvested yesterday is not equivalent to a fully cured one bought from a reputable grower.
Handle bulbs gently
Garlic bruises more easily than its papery exterior suggests. Damaged cloves may soften or spoil sooner during storage.
Do not throw harvested heads into a bucket or pull roughly on their stems. Lift them carefully and keep the largest sound bulbs apart from any with visible damage.
If one clove is damaged but the rest of a bulb is sound, use the undamaged cloves promptly after inspection rather than expecting the head to keep for months.
Should you refrigerate whole garlic?
Whole cured garlic can be stored at appropriate cool dry room conditions, but fridge conditions are often comparatively humid and may encourage other changes when bulbs are moved back to room temperature.
Commercial cold storage uses tightly controlled temperature and humidity; a domestic refrigerator is not necessarily equivalent.
For everyday shopping quantities, a well-ventilated cool cupboard is often the straightforward answer. If following a specialist long-term storage system, use its precise instructions.
Store peeled cloves differently
Once garlic is peeled, the protective wrapper has been removed. Don't leave a bowl of peeled cloves on the counter for days.
Refrigerate peeled cloves in a clean covered container and use promptly, following appropriate food-storage guidance. You can freeze peeled or chopped garlic in small portions for cooked dishes.
Write dates on prepared food containers. A clear jar of peeled garlic is much less informative if you have forgotten when you prepared it.
Garlic in oil requires special caution
Homemade garlic submerged in oil can create low-oxygen conditions that support botulism toxin formation if stored improperly. It is not the same as keeping a dry whole bulb.
Do not store raw homemade garlic-in-oil at room temperature. Follow tested food-preservation guidance for preparation, refrigeration and short-term use, or freeze suitable portions as directed.
A jar that looks or smells normal is not proof that such a mixture is safe. The concern is serious enough to warrant specific tested instructions rather than a kitchen shortcut.
What if a clove starts sprouting?
A small green shoot emerging from a firm clove is not necessarily a reason to discard it. The flavour may change and the clove may have begun losing quality.
Check for mould, softness or decay first. If the clove is otherwise sound, you may choose to remove the green sprout for taste or use the clove promptly.
Sprouting indicates the bulb is not remaining fully dormant. Review storage conditions and use that batch before buying more.
Don't store beside a steamy sink
Kitchens vary enormously in humidity. A cool-looking cupboard next to a dishwasher vent can become warm and damp several times a day.
Move garlic to a better ventilated area if the surrounding cupboards regularly develop condensation. Moisture in storage is a particular enemy.
Keep garlic away from direct sunlight and heat sources, and avoid storing it tightly against produce that releases lots of moisture.
How long should whole garlic keep?
Shelf life varies by cultivar, curing quality and storage conditions. Iowa State Extension says properly dried garlic can often be stored for several months under suitable conditions.
The RHS similarly says cured bulbs can usually be kept for months, though different harvests and varieties will perform differently.
Inspect periodically instead of trusting a single universal expiry date. Remove deteriorating bulbs before they affect the rest of the batch.
When to throw it away
Discard bulbs with extensive mould, wet rot, an unpleasant decayed smell or cloves that have collapsed into mush. Don't assume that cooking will make badly spoiled ingredients acceptable.
If you discover a few rotten heads, clean the basket and examine the remaining ones. Improved airflow may prevent the same problem recurring.
For garlic-in-oil products with uncertain storage history, err on the side of caution. Botulism risk can't be judged by smelling the jar.
Buy quantities you can reasonably use
Buying a large net of garlic is economical only if you have suitable storage and will use it before quality declines.
In a warm small kitchen, a couple of bulbs may make more sense than a kilogram. If you harvest a large garden crop, curing and ventilated storage are worth setting up properly.
The winning routine is simple: keep whole cured bulbs dry, cool and airy, use damaged or sprouting ones sooner, and treat peeled or oil-packed garlic as a separate preservation problem.