When to Plant Broccoli in Australia

Give your broccoli seeds the best chance for success.

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If you have just purchased some seeds to grow your own broccoli, you might be wondering when is the best time to plant them.

Broccoli is a cool-season crop that takes from 8 to 20 weeks to grow from seed through to being ready for the initial harvest.

The growing season varies by location, but here are general guidelines for when to plant broccoli throughout the year.

When to plant broccoli in Australia

Autumn is generally considered the best time to plant broccoli, for harvesting in Winter or Spring.

However, this differs slightly based on the climate of the region you are located.

  • Temperate climates – February – May
  • Warm climates – April – July
  • Cool climates – October – March

Broccoli is usually planted into seed trays in late Summer for planting out seedlings in Autumn.

Optimal soil temperature for broccoli

Broccoli seeds germinate in soil temperatures anywhere from 10°C to 30°C.

Once established, broccoli will thrive in soil temperatures from 18°C to 24°C.

Anything warmer than this, and your broccoli crop may “bolt”, meaning the heads will start to quickly open up and the plant will flower.

Warm weather varieties

Traditionally a cool season crop, Broccoli can now be grown year-round in Australia, thanks to a range of different varieties of the plant.

Summer Green is the most popular variety with higher heat tolerance.

How long does broccoli take to grow?

Broccoli generally takes from 8 to 20 weeks to grow from seed through to being ready for the initial harvest.

If you want your broccoli to grow faster, provide it with plenty of fertiliser, sun, and water.

Also, keep in mind that different broccoli varieties have different days to maturity

How to grow broccoli

Our Broccoli Grow Guide below provides some basic info to get you started on your broccoli growing journey. Also, check out our How to Grow Broccoli post.

Grow Guide: Broccoli

Family: Brassicaceae
Genus: Brassica
Plant type: Annual
Height: 45–60cm
Climate: Suitable for most climates
How to plant broccoli
Soil: Rich soil with good drainage
Soil pH range: 6 to 7
Soil temperature: 18°C to 24°C
Spacing needs: 40cm
Seed depth: 1cm
Germination days: 7 to 10 days
When to sow: Autumn
Caring for broccoli
Sun: Full sun
Water: Every 3 days
Feeding: Apply a low nitrogen fertiliser after planting, then apply a balanced fertiliser fortnightly
Harvesting broccoli
Time to harvest: 8 to 20 weeks
When to harvest: Harvest broccoli when the central head is deep green and fully developed with small, tightly packed buds

FAQ

Does broccoli need full sun?

Yes, broccoli grows best in full sun (at least 6 hours of direct sunlight per day).

Does broccoli grow year round?

Some newer varieties of broccoli can be grown year-round in many parts of Australia. However, as a cool-season crop, it’s generally best to plant broccoli in Autumn for harvesting in Winter and Spring.

Photo of author

Steve Kropp

Based in Melbourne, Steve's passion is vegetable gardening, and he’s been writing about it for almost 5 years. He also loves all things DIY, and is always up for a new project. When not working on his own garden projects or blogging, Steve enjoys spending time with his family, cooking delicious meals from fresh produce picked from his garden, and coaching his son’s footy team.