Learning how to cure and store onions and garlic from the garden helps protect months of growing effort and gives you dependable flavour well beyond harvest. Proper drying reduces mould, slows sprouting and keeps bulbs firm, whether they were grown in a backyard bed, raised planter or greenhouse.
Australian gardeners often harvest garlic in late spring and onions through summer, although timing varies between Hobart, Melbourne, Sydney, Brisbane, Adelaide and Perth. Local weather matters greatly: a dry Adelaide spell can make curing easy, while Brisbane humidity or a damp Melbourne week calls for extra airflow and protection from rain.
| Crop | Harvest sign | Typical curing time | Best storage conditions |
|---|---|---|---|
| Garlic | Lower leaves brown, upper leaves still green | 2–4 weeks | Cool, dry and airy |
| Brown or yellow onions | Tops bend over and necks tighten | 2–3 weeks | Dry, dark and ventilated |
| Red onions | Papery skin develops and neck dries | 2–3 weeks | Cool, dry and gently handled |
Garlic is ready when several lower leaves have turned brown but about half the upper leaves remain green. Lift one test bulb before harvesting the whole crop. Mature cloves should fill the skin, while immature bulbs often look small and loosely wrapped.
Onions are ready when their tops naturally fold over and the neck begins to soften and dry. Stop watering several days before lifting if the soil is already dry, but do not leave mature bulbs sitting through heavy rain. In coastal New South Wales or subtropical Queensland, wet conditions can encourage rot quickly.
Use a garden fork to loosen the soil rather than pulling hard on the foliage. Shake off loose dirt without washing the bulbs, and move damaged, bruised or cut specimens away from the main batch. These are suitable for immediate cooking, not long-term storage.
Lay freshly lifted onions and garlic in a single layer, leaving space around every bulb. A covered veranda, shed, carport or airy greenhouse bench can work well. The growing advice in What’s Growing On is also a useful reminder that airflow and seasonal conditions should guide garden work.
Keep the crop sheltered from direct sun, rain, dew and strong wind. Direct sunlight can cause sunscald, while rain can re-wet the outer layers and extend the drying period. In very warm inland areas, choose a shaded location that stays below the hottest afternoon temperatures.
Do not trim roots or foliage immediately. The leaves continue transferring energy into the bulb while the neck closes. Brush away remaining soil only after it has dried naturally, using your fingers or a soft cloth rather than water.
Curing is the controlled drying stage that creates a tight, protective skin. Leave onions and garlic undisturbed for two to four weeks, depending on bulb size, temperature and humidity. Turn them occasionally if the underside feels damp, but handle them gently.
The crop is cured when the outer skin rustles, the neck is completely dry and the roots feel brittle. For garlic, the cloves should feel firm inside the wrapper. For onions, the neck should be narrow and dry rather than thick, green or wet.
In Brisbane or during a humid Sydney summer, use a fan to improve circulation without blowing directly at high speed. In Adelaide, Perth or inland Victoria, natural ventilation may be enough, though sudden evening moisture still needs attention.
Sort every bulb before putting it away. Keep firm, fully cured specimens for storage and set aside anything soft, split, mouldy or badly bruised. One decaying onion can spread moisture and fungal problems to neighbouring bulbs.
Remove only the loose outer dirt and flaky skin. Trim garlic roots close to the base once they are dry, taking care not to cut into the basal plate. Onion tops can be cut to about 2–5 centimetres, or left longer for braiding if the stems are clean and flexible.
Gardeners growing heritage varieties may also wish to record the cultivar, harvest date and quantity. A simple collection record guide can inspire a practical inventory system for valuable seed lines, rare bulbs and other garden collections.
Store onions in mesh bags, wire baskets, slatted crates or clean netting where air can move freely. Avoid sealed plastic bags, as trapped condensation encourages soft rot. Keep them in a dark, dry place away from potatoes, which release moisture and gases that can shorten onion storage life.
A cool pantry or ventilated shed is preferable to a warm kitchen. Check the crop every week or two, especially during humid weather. Remove any bulb showing softness, leaking liquid or mould before the problem spreads.
Many Australian households buy onions in bulk from farmers’ markets or produce shops, but homegrown bulbs need the same careful ventilation. Red onions generally store for a shorter period than firm brown varieties, so use them first.
Garlic keeps best in a dry, shaded place with steady airflow. Hang plaited bulbs, place them in net bags or use a shallow basket. Avoid refrigerating whole bulbs, because cold and moisture can trigger sprouting once they return to room temperature.
Keep planting stock separate from bulbs intended for cooking. Choose the largest, healthiest cloves for the next crop and label them by variety and harvest year. This is especially helpful when comparing types suited to cool Tasmania, temperate Victoria or warmer areas around Perth.
Break a bulb into cloves only as needed. Once separated, cloves lose their protective arrangement and should be planted or used promptly. Inspect stored garlic regularly and remove any cloves with brown lesions, unusual softness or visible mould.
A good storage area should be clean, dry, shaded and protected from rodents. Raised shelves are useful in sheds that may take on water, while a hanging mesh rack works well in a compact urban garden. Keep bulbs away from chemicals, fuel and strong-smelling materials.
Labeling batches makes it easier to track which varieties store longest and which perform best in your climate. For broader household growing and kitchen ideas, the kitchen growing resources can complement a seasonal plan for using fresh and stored produce.
Use stored onions and garlic regularly rather than leaving them forgotten until spring. Cook the earliest-sprouting bulbs first, reserve sound bulbs for later meals, and replant selected garlic cloves at the recommended local planting time. With careful harvesting, thorough curing and steady ventilation, a modest garden harvest can remain useful for many months.