How to grow Pumpkin in Australia
Pumpkins need a long, warm season, plenty of space and rich soil, but reward you with fruit that stores for months. Sow in spring once the soil is warm (or in the dry season in the tropics), give each vine a couple of metres to roam, and harvest only when the stalk has dried and the skin is hard, then cure them in the sun.
📖 Our full guide: Planting Pumpkin Seedlings and Pumpkin Seeds in Australia
At a glance
When to sow by region
| Region | When to sow | Regional note |
|---|---|---|
| South East Queensland | August to February | |
| Northern Rivers NSW | September to February | Sow from September to February. Inland, make sure the frost risk has passed before sowing. |
| Sydney & Coastal NSW | September to December | Sow from September to December, once the soil has warmed in spring. Avoid winter sowing; the window is shorter than in SEQ. |
| Melbourne & Victoria | October to December | Sow from October to early December. Pumpkins need a long warm season, and the autumn frosts from about mid May cut it short, so there is no winter sowing. |
| Adelaide & SA | September to November | Sow Sep undercover or Oct to Nov direct after frost. Vines handle summer with deep weekly watering. Harvest and cure before winter. |
| Perth & WA | August and September | Mediterranean: sow Aug to Sept only. Pumpkin set fruit before Jan heat; avoid sowing Dec to Feb. |
| Tasmania | October and November | Sow Oct to Nov only. Choose fast varieties so fruit matures and cures before April frost. |
| Canberra & ACT | November | Sow in November after the last frost. Pumpkins need 80 to 120 frost free days, so later sowings will not ripen before the April frosts. |
| North Queensland | April to August | Dry season Apr to Aug. A Bowen winter crop. Mildew and fruit rot rule out wet season vines. |
| Darwin & Top End | April to July | Dry season Apr to Jul. Long crop of 15 to 20 weeks so sow early dry. Wet season mildew destroys vines. |
Where to plant
Grow pumpkins in a warm, sunny spot sheltered from cold wind, in fertile soil that holds moisture but does not waterlog. Most varieties form large, trailing vines that need lots of space; bush types still reach about 90 cm across. Vines can be trained in a circle with short canes, or up and over a strong frame for small-fruited types.
Pumpkins need a long, frost-free season, so in short-season areas choose quick varieties and sow as early as the soil allows.
- South East Queensland: sow from August to February. In the Northern Rivers, sow from September to February, after frost risk inland.
- Sydney: sow from September to December once the soil has warmed.
- Melbourne: sow from October to early December. Autumn frosts from about mid May end the season.
- Adelaide: sow under cover in September or direct in October and November after frost. Water deeply each week through summer.
- Perth: sow from August to September so fruit sets before the January heat.
- Canberra: sow in November after the last frost; later sowings will not ripen before April frosts.
- Hobart: sow in October and November only, choosing fast varieties.
- North Queensland and Darwin: sow in the dry season, from April to August (to July in Darwin). Wet season mildew and fruit rot destroy vines.
Choosing a variety
| Variety | Notes |
|---|---|
| Queensland Blue | Australian heirloom with blue-grey skin and sweet, dense orange flesh; a long keeper |
| Butternut | Tan skin and sweet, nutty flesh; smaller fruit for smaller gardens; stores well |
| Jap or Kent | Green-grey mottled skin and very sweet, dense flesh; vigorous and heavy cropping |
| Jarrahdale | WA heirloom with grey-blue skin and large, sweet fruit; an excellent keeper |
| Golden Nugget | Bush type without a sprawling vine, with small orange fruit for small beds |
How to plant
- Wait until the soil is warm, about 20°C or more, after the last frost.
- Build a low mound of soil mixed with plenty of compost and well-rotted manure for each plant, about 1.5 m apart.
- Sow 2 seeds 2 to 3 cm deep in each mound and keep the stronger seedling.
- In short-season areas, start seed in pots under cover a few weeks early and plant out after frost.
- Water in and keep the soil moist while seedlings establish.
Watering and feeding
Water deeply at the base of the plant, keeping the leaves dry to limit mildew. Pumpkins have big leaves and need a lot of water in hot weather, especially while fruit is forming. Mulch the bed to hold moisture and keep developing fruit off wet soil.
Feed well early with compost or a balanced fertiliser while the vines are running, then switch to a potassium-rich feed once fruit has set.
Pruning and care through the year
- Male and female flowers are separate; female flowers have a tiny pumpkin behind the petals. If small fruit shrivel and drop, they were not pollinated. In cool or wet weather, hand pollinate in the morning by brushing pollen from a male flower onto the centre of a female flower.
- Once a few fruit have formed on each vine, pinch out the growing tips so the plant puts its energy into ripening them.
- Rest developing fruit on straw or a piece of timber so it does not sit on wet soil.
- Check for pumpkin beetles on young plants and powdery mildew on older leaves.
Harvesting
Harvest when the stalk has withered and turned brown and dry, the rind is hard and does not mark with a fingernail, the fruit has turned its full colour and sounds hollow when knocked. Leaves dying back are another sign. Pumpkins picked too early soon rot. Harvest before frost or heavy rain at maturity.
Cut with secateurs or loppers, leaving about 10 cm of stalk, and never carry pumpkins by the stalk. Cure them in a sunny, airy spot for a week to 10 days or longer, on their sides on a rack or straw, turning every few days. Store in a single layer on their sides in a cool, dark, dry place, ideally about 10 to 16°C, and check weekly for soft spots. Well-cured pumpkins of good keeping varieties store for several months.
Using it
Roast, steam or mash pumpkin, use it in soups, curries, risottos and scones, and roast the seeds as a snack. Keep cut pieces in the fridge and use within a week.
Saving seed
Pumpkins cross readily with other pumpkins and squash of the same species, so saved seed may not come true unless only one variety was grown nearby. Scoop seed from a fully ripe, cured fruit, rinse it, dry it well and store it in a paper envelope.
Companion planting
Pumpkins are part of the traditional three sisters planting with corn and climbing beans, and need room to spread.
Good companions
- Corn Tall corn stands above the pumpkin vines, which shade the ground and suppress weeds between the stalks.
- Beans Climbing beans can use the corn as a trellis in a three sisters bed, and add nitrogen to the soil.
- Nasturtium A low flowering companion that brings in insects, including the bees pumpkins need for pollination.
- Marigold Small flowers at the edge of the patch that draw in bees and hoverflies.
Keep apart
Avoid planting these close to pumpkin.
- Potato Both are heavy feeders that need lots of space; growing them in separate beds avoids competition.
Pests and diseases
Powdery mildew, pumpkin beetles and rats are the most common problems. Poor pollination is often mistaken for disease.
Pests to watch for
- Pumpkin beetle Orange beetles with black spots chewing holes in leaves and flowers, mostly on young plants.
- Rats Ripe pumpkins hollowed out from a small hole in the rind. Harvest promptly and store out of reach.
Diseases to watch for
- Powdery mildew White powdery patches on the leaves, worst late in the season. Water the soil, not the leaves, and space plants for airflow.
- Downy mildew Yellow angular patches on the upper leaf with grey-purple fuzz beneath, in humid weather.
- Fusarium wilt Vines wilt and collapse even with moist soil. Rotate the cucurbit bed and remove affected plants.
Common questions
When is a pumpkin ready to pick?
When the stalk has withered and turned brown and dry, the skin is hard and does not mark with a fingernail, the colour is full and the fruit sounds hollow when knocked.
Why are my baby pumpkins falling off?
They were not pollinated. Pumpkins have separate male and female flowers and rely on bees. In cool or wet weather, hand pollinate in the morning using a male flower.
How do I cure pumpkins?
Cut them with about 10 cm of stalk and leave them in a sunny, airy spot on their sides for at least a week, turning every few days, until the skin hardens. Then store them in a cool, dark, dry place.
How long do pumpkins store?
Well-cured keepers such as Queensland Blue, Jarrahdale and butternut store for several months in a cool, dry place at about 10 to 16°C. Check them weekly.
Why do my pumpkin leaves have white powder on them?
That is powdery mildew, common late in the season. Water at the base, keep leaves dry, space plants well and remove badly affected leaves.
When do I plant pumpkins in Melbourne?
From October to early December, once the soil is warm. Pumpkins need a long warm season, and autumn frosts from mid May end it.
Should I pinch out pumpkin vines?
Once each vine has a few fruit set, pinching out the tips helps the plant ripen those fruit instead of making more vine.
Sources we checked: Local Food Connect (Robin Gale-Baker): Harvesting, curing and storing pumpkins; RHS: How to grow pumpkins.