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Growing Butternut Squash in Queensland

Introducing Butternut squash

A delicious warm season crop. These squashes have a deep orange-coloured flesh with a distinct nutty flavour. They’re easy to grow and produce an abundance of winter squashes which are versatile for cooking and store beautifully.

Classic Mistakes

Make sure your butternuts get enough sun, and have enough space to grow.

Sunlight

Grow in: Full Sun

Butternuts need lots of sun, but will be happy with some shade over the hottest part of the day.

Soil Preparation

Butternuts like a rich soil. Work in plenty of compost and well-rotted manure.

Sowing Seed

Sow seed: August-February
Sowing depth: 10 mm

Butternut needs warm soil to germinate, so plant your seeds once the soil is nice and warm.

Sow your seeds into mounds about 1 m apart. Keep the soil damp while they germinate. Once the plants are up and established, choose the strongest plants and thin the rest.

Planting

Plant seedlings: All Year Round

Seedlings can be planted year-round, but will do better in warmer weather.

Butternut squash tend to do best when planted from seed straight into the garden. They can be planted as seedlings though. Just handle them with care, because they don’t like to have their roots disturbed. Plant them into mounds as you would for seeds and remember to add some bonemeal to each hole and keep the soil moist until they’re settled.

Care

Once your vines reach a desirable length, pinch out the growing tips to prevent them from growing longer. Butternuts can also be grown vertically if space is an issue. Remove any diseased leaves, but remember not to add them to your compost pile.

Watering

Butternuts like moist soil. Water them often in the hot, dry summer months. It’s best to try not to get their leaves wet, as they are prone to fungal diseases. If you must wet the leaves, water them in the morning so that the leaves can dry off quickly during the warmth of the day.

Feeding

Butternuts are heavy feeders and benefit from regular feeding. Feed every 4-6 weeks throughout the growing season.

Mulching

Mulching helps to keep the soil moist and cool. Apply a generous layer of organic mulch like lucerne, sugarcane or pea straw. Since butternuts are such heavy feeders, a compost mulch is also a good option, because it’ll keep feeding the hungry vines.

Harvesting

Harvest: 12 to 15 Weeks After Planting

Butternuts can be harvested once their skins have hardened and thickened and the stem is shriveled and woody. Pick mature fruit as you need them. Use a sharp knife to cut them away from the vine. Be sure to leave a piece of stem attached to each butternut. If you want to store your butternuts, only harvest them at the end of summer so that their skins can become hard and thick. Butternuts should be cured before storing.

What to do about Snails and slugs?

Lay down grit, like eggshells or silica sand or create barriers around your plants. Remove any slugs or snails that you see.

What to do about Powdery Mildew?

Milk spray or baking soda solution work well and can be sprayed on affected plants.
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