Growing your own garlic is one of the most rewarding projects for an Australian home gardener. The flavour of fresh, homegrown bulbs beats the supermarket imports every time. Plus, you get the satisfaction of knowing exactly what went into your food.
While garlic is easy to grow, getting big, juicy bulbs requires getting the timing right for your specific location. From the humidity of Darwin to the frost of Hobart, here is how to grow a good crop.
Step 1: Know Your Zone and Variety
Australia is huge, so one rule does not fit all. Success starts with picking the correct type of garlic for your backyard.
The Two Main Types
- Softneck Varieties: These do not produce a flower stalk. They are best for warmer climates, store for longer (up to 12 months), and are the type you can braid.
- Hardneck Varieties: These produce a central flowering stalk called a 'scape'. They need a cold winter to form good bulbs. They have incredible flavour but a shorter shelf life.
Which one is for you?
- Tropical (Darwin and the Top End of the NT, Cairns, Townsville and far north Queensland, the Kimberley in WA): Hot and humid, and honestly the hardest place in Australia to grow garlic. Your best chance is the day-length-neutral subtropical types Glenlarge, Kenlarge or Italian Pink, or elephant garlic, planted once the wet season ends. If you are determined to try a purple hardneck, chill the cloves in the fridge for 4 to 6 weeks before planting to mimic a winter, and expect mixed results.
- Subtropical (Brisbane and south-east Queensland, the Gold and Sunshine Coasts, coastal northern NSW): You have mild winters. Stick to the day-length-neutral subtropical types (Glenlarge, Kenlarge, Italian Pink) and get them in early, March to April at the latest.
- Arid and semi-arid (Alice Springs in the NT, Broken Hill in NSW, Mildura in Victoria, Port Augusta in SA, Kalgoorlie and the WA goldfields, and the inland of NSW, Queensland, SA and WA): You have hot days and cold nights. Softneck and Turban types both do well, but plant in April to May once the autumn heat has passed, and mulch heavily to keep water in the soil.
- Temperate (Sydney and the NSW coast, Melbourne and coastal Victoria): You have the easiest run. You can grow both softneck and hardneck varieties; on the humid NSW coast, softnecks are the safer bet.
- Mediterranean (Perth and the south-west of WA, Adelaide and the SA coast): Wet winters and dry summers suit garlic well. Subtropical softnecks and the purple Turban types do especially well here; plant March to May and harvest before the dry heat sets in.
- Cool and alpine (Hobart and Tasmania, Canberra and the ACT, Ballarat and the Victorian central highlands, the NSW tablelands, the Snowy Mountains and the Victorian high country): You have the cold winters that hardneck varieties need. This is where the purple garlics such as Australian Purple, Tasmanian Purple and Glamour do their best work.
These zones are broad groupings, and your local frost dates decide the finer timing. We cannot send garlic bulbs to Western Australia or Tasmania because of plant quarantine rules, so gardeners there will need a local supplier.
Step 2: Soil Preparation
Garlic hates wet feet. If your soil is boggy or heavy clay, your bulbs will rot.
What garlic wants:
- Drainage: Essential. If water sits in a puddle, build a raised bed.
- Texture: Loose and crumbly.
- Food: Mix in aged compost or blood and bone a few weeks before planting. Avoid fresh manure as it is too strong.
Step 3: Planting Your Cloves
When to Plant
- Temperate and Mediterranean: April to May (subtropical-type softnecks can go in from March). Melbourne, at the colder end of the temperate zone, can start from late March.
- Arid and semi-arid: April to May, once the autumn heat has passed.
- Cool and alpine: Late March to May, before the ground gets really cold.
- Subtropical: Late February to mid-March in warmer areas, March to April elsewhere. Planting after April usually means smaller bulbs.
- Tropical: April to May, once the wet season has finished (buy bulbs by February and start any fridge chilling in February or March).
How to Plant
- Separate: Break the bulb into individual cloves. Do this only 24 hours before planting, so they do not dry out.
- Select: Use the big, fat cloves from the outside of the bulb. Use the small middles for cooking, not planting. Keep the papery skin on.
- Position: Plant the clove with the flat end down (roots) and the pointy end up.
- Depth: Plant about 5cm deep (tip of the clove should be covered by 2cm of soil). In tropical and subtropical areas, plant shallower (3cm) to reduce rot.
- Spacing: Give them room, 15cm between cloves and 30cm between rows.
Mulch
Cover your garden bed with sugar cane mulch or pea straw immediately after planting. This keeps weeds down and moisture in.
- Tropical and subtropical: 5cm layer.
- Temperate and Mediterranean: 7cm layer.
- Cool and alpine, arid and semi-arid: 10cm layer (it keeps the soil warmer in frost and cooler in heat).
Companion Planting & Garden Notes
Good Companions: Roses, fruit trees, tomatoes, brassicas, strawberries, lettuce, beetroot. Avoid Planting Near: Beans, peas and asparagus, which gardeners have traditionally kept away from alliums (the evidence is thin, but there is no reason to test it in a small bed)
Step 4: Watering and Feeding
Garlic is hungry and thirsty, but timing is everything.
- Autumn (Planting): Water well to settle them in. Keep soil moist but not soaking.
- Winter (Roots): The green shoots might not grow much, but the roots are busy. Water occasionally if it does not rain.
- Spring (Bulbs): This is the engine room. As the days get longer, the bulbs get fatter. Increase watering. Feed them with a nitrogen fertiliser (like blood and bone) once a month.
- Four to six weeks before harvest: Stop feeding. When the lower leaves start to yellow, stop fertilising, and reduce watering over the last two to three weeks. Too much water now causes rot and split bulbs.
Step 5: Pests and Diseases
Australia is lucky to miss many overseas pests, but we still have a few.
- Thrips and aphids: Tiny sap-suckers that streak and silver the leaves. Treat with an insecticidal soap registered for thrips and aphids on vegetables and follow the label; horticultural oils control aphids but not thrips.
- White Rot: The worst nightmare. It looks like white fluff on the base of the bulb. There is no cure. Pull the plants out and bin them (do not compost). The resting bodies can survive in soil for 20 years, so keep garlic, onions, leeks and chives out of that spot for as long as you can, ten years at the very least.
- Rust: Orange spots on leaves in humid weather. Ensure good airflow between plants.
Step 6: The Harvest
Do not guess. The leaves will tell you when they are ready.
The Signs
- Wait until the bottom few leaves are brown and paper-dry.
- The top 5 or 6 leaves should still be green.
- Do not wait until all the leaves are brown; the wrappers will split, and the garlic will not store well.
How to Harvest
- Loosen the soil with a fork.
- Gently lift the bulb (do not yank the stalk or it might snap).
- Brush off the dirt. Do not wash them. Water is the enemy of storage.
Step 7: Curing and Storage
To make your garlic last for months, you must 'cure' it. This dries out the skin, sealing the bulb.
- Hang them up: Bundle them or lay them on a rack in a dry, airy spot out of direct sunlight (a shed or veranda works well).
- Wait: Leave them for 3 to 4 weeks.
- Trim: Once the stems are completely dry and brittle, trim the roots and cut the stalks (unless you are braiding them).
- Store: Keep them in a pantry or a cool, well-ventilated spot. Net bags or wire baskets are best. Do not put them in the fridge (unless you are in the humid tropics) as the cold makes them sprout.
Quick Troubleshooting
- Small Bulbs: You planted too late, or didn't water enough in spring.
- Bulbs Rotting: The soil was too wet, or you watered too close to harvest.
- Sprouting in the cupboard: It is too humid or too light. Keep them darker and drier.
- No Cloves (One solid round bulb): It didn't get cold enough, or you harvested way too early.
| Zone | Planting time | Harvest time | Best type |
| Tropical (Darwin and the Top End of the NT, Cairns, Townsville and far north Queensland, the Kimberley in WA) | April to May, after the wet | August to September | Subtropical softneck or elephant garlic; chill purple hardnecks first |
| Subtropical (Brisbane and south-east Queensland, the Gold and Sunshine Coasts, coastal northern NSW) | Late February to April | August to October | Subtropical softneck |
| Arid and semi-arid (Alice Springs in the NT, Broken Hill in NSW, Mildura in Victoria, Port Augusta in SA, Kalgoorlie and the WA goldfields, and the inland of NSW, Queensland, SA and WA) | April to May | October to November | Softneck or Turban hardneck |
| Temperate (Sydney and the NSW coast, Melbourne and coastal Victoria) | April to May (from late March in Melbourne, the colder end) | November to December | Softneck or hardneck |
| Mediterranean (Perth and the south-west of WA, Adelaide and the SA coast) | March to May | October to December | Softneck or Turban hardneck |
| Cool and alpine (Hobart and Tasmania, Canberra and the ACT, Ballarat and the Victorian central highlands, the NSW tablelands, the Snowy Mountains and the Victorian high country) | Late March to May | November to January | Hardneck (Turban types earlier, October to November) |
Frequently Asked Questions: Growing Garlic in Australia
When should I plant garlic in Australia? Plant garlic from late February to May, depending on your climate zone. Cool and alpine zones (Hobart and Tasmania, Canberra and the ACT, the NSW tablelands and the Victorian high country): plant late March to May. In temperate zones (Sydney, Melbourne), plant from April to May, or from late March in Melbourne, the colder end of the zone. Mediterranean zones (Perth, Adelaide) plant March to May, and arid and semi-arid zones (Alice Springs, Broken Hill, Mildura, Kalgoorlie and the inland) plant April to May. Subtropical zones (Brisbane, northern NSW) plant March to April, and the day-length-neutral types can go in from late February in warmer areas. Tropical zones plant April to May once the wet season ends, with subtropical softnecks or pre-chilled cloves.
How long does garlic take to grow in Australia? Roughly five to nine months. Subtropical softnecks planted in late summer or early autumn are ready in about five to six months (August to October). Temperate and Mediterranean gardens harvest six to eight months after an April or May planting (October to December). Cool and alpine gardens harvest from late November to January, eight to nine months after planting. Turban types mature earlier than other hardnecks.
Can I plant garlic from the supermarket? Not recommended. Supermarket garlic is often treated with sprout inhibitors, may carry diseases, and varieties are rarely suited to Australian conditions. Buy clean, Australian-grown planting garlic from a reputable supplier that names the variety and where it was grown, and choose a variety suited to your climate zone.
What's the best garlic for my climate zone? Cool and alpine zones grow hardneck types, including the purple Turban garlics Australian Purple, Tasmanian Purple and Glamour. Temperate and Mediterranean zones suit both types, for example Australian White, Austral, Creole and the Turban purples. Subtropical zones need the day-length-neutral subtropical types Glenlarge (Early Purple), Kenlarge and Italian Pink. Tropical zones use those same subtropical types or elephant garlic, with fridge chilling if you want to try a purple hardneck. Arid and semi-arid zones suit softneck and Turban types with heavy mulch and steady water. For warm districts there is also Lismore Red, a Turban hardneck.
How deep do I plant garlic cloves? Plant garlic cloves 5-7cm deep in temperate, Mediterranean, and cool and alpine zones. Plant 3-4cm deep in tropical and subtropical zones for better drainage. Always plant the pointed end up, with the flat basal plate down; space cloves 15cm apart in rows 30cm apart for optimal bulb development.
Does garlic need full sun in Australia? Yes, garlic requires full sun (minimum 6 hours daily) for maximum bulb development. Partial shade reduces bulb size significantly. In tropical zones, afternoon shade protection during peak heat periods can reduce stress without compromising growth.
How often should I water garlic? Water well after planting, then only enough to keep the soil just moist through winter (often nothing if it rains). In spring, when the bulbs are swelling, water deeply once or twice a week, about 25 to 30mm each week including rain. Reduce watering over the last two to three weeks before harvest. Consistent moisture produces the largest bulbs; irregular watering causes split bulbs.
When do I stop watering garlic before harvest? Reduce watering over the last two to three weeks before harvest, and stop once the lower leaves begin to brown. Dry soil conditions facilitate easier harvesting, reduce disease risk during curing, and improve storage life. This pre-harvest dry period is critical for quality bulbs.
How do I know when garlic is ready to harvest? Harvest when 40-50% of leaves (typically lower 3-4 leaves) have browned while the upper 5-6 leaves remain green. Dig a test bulb, cloves should be distinct but not separated, wrappers papery but intact. Don't wait for all the leaves to brown; by then the bulbs are over-mature and the wrappers split.
Should I cut the flower stalks off the garlic? Yes, remove scapes (flower stalks) from hardneck varieties when they are curled but before they straighten. This redirects energy from the flower to the bulb; trials report bulb-yield gains from about 5 to 30 per cent depending on soil and timing. Scapes are edible delicacies used in cooking. Softneck varieties don't produce scapes.
Can I grow garlic in pots in Australia? Yes, garlic grows successfully in containers at least 30cm deep and 20cm in diameter. Use premium potting mix with added compost. Drainage is critical; containers must have multiple drainage holes. Container garlic requires more frequent watering than ground-planted crops. Harvest slightly earlier as confined roots limit bulb size.
Why didn't my garlic form bulbs? Bulbs fail to form when the cloves did not get enough cold (tropical and subtropical zones without pre-chilling), when planting was too late in the season, using the wrong variety for the climate zone, or applying excessive nitrogen fertiliser late in the growing season. Ensure proper timing and variety selection, and stop nitrogen feeding four to six weeks before the expected harvest.
How do I prevent garlic diseases in Australia? Plant clean, healthy planting garlic from a reputable Australian supplier, ensure excellent drainage through raised beds or amended soil, practise at least a 3-year crop rotation with non-alliums, provide adequate plant spacing for airflow, water at soil level (not overhead), and mulch to prevent soil splash. Remove diseased plants immediately.
Can I save my own garlic for planting next year? Yes, reserve the finest bulbs from the healthiest plants as seed garlic for next season. Select the largest, disease-free bulbs displaying true variety characteristics. Store seed garlic the same way as eating garlic, but keep it separate. Plant within 12 months; viability declines after one year. Don't save garlic from diseased crops.
What should I plant after garlic? Follow garlic with non-allium crops. Excellent successors include legumes (beans, peas) to restore nitrogen, brassicas (broccoli, cabbage), leafy greens, tomatoes, or cucurbits. Never follow garlic with onions, leeks, or shallots; maintain a minimum 3-year rotation to prevent disease buildup.
Why is my garlic yellowing early? Early yellowing indicates overwatering/poor drainage, nitrogen deficiency, pest damage (thrips, aphids), or disease (rust, white rot, basal rot). Check soil moisture levels, inspect leaves for insects, apply nitrogen side-dressing if deficient, and examine roots for rot. Address the cause promptly to save the crop.
How long does cured garlic last? Properly cured and stored garlic lasts 4 to 12 months depending on type. Turban and other hardneck types typically store 4 to 8 months. Softneck types store 6 to 12 months. Tropical and subtropical storage rarely exceeds 6 months without refrigeration. Store in a dark, dry, airy spot at ordinary room temperature (around 15 to 20°C). Avoid the fridge and cold rooms: temperatures between about 5 and 18°C are where garlic breaks dormancy fastest, with the fridge the worst offender.
Can I grow garlic in Brisbane/Melbourne/Sydney/Perth? Yes, every capital except Darwin grows garlic reliably with the right variety and timing, and even Darwin gardeners can get a crop of the subtropical types in a good year. Brisbane (subtropical): subtropical softneck varieties planted March to April. Melbourne (temperate, at the colder end of the zone): hardneck varieties planted late March to May. Sydney (temperate): both types planted April to May. Perth and Adelaide (Mediterranean): subtropical softnecks and Turban types planted March to May. Hobart and Canberra (cool and alpine): hardneck types planted late March to May. Darwin (tropical): possible but unreliable; use subtropical softnecks or elephant garlic in the dry season.
What's the difference between hardneck and softneck garlic? Hardneck garlic produces central flower stalks (scapes), requires cold winters, has fewer but larger cloves arranged in a single ring, stores for 6-8 months, and offers complex flavours. Softneck garlic produces no scapes, tolerates warmer winters, has multiple clove rings of varying sizes, stores for 8-12 months, and suits warm Australian zones better.
Why are my garlic bulbs small? Small bulbs result from late planting, missing the optimal growing period, insufficient fertiliser (particularly nitrogen during early growth), water stress during the critical bulb development period, overcrowding (planted too close), wrong variety for the climate zone, or harvesting too early. Address these factors to achieve improved results next season.
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