When to Plant Broccoli in Canberra, Cold / Highland Guide

Sow August to March. Right now in September you can sow.

Published · Last reviewed · By Garden Buddy
Growing advice is reviewed by hand. Planting dates, current conditions and prices on this page update daily.

This Broccoli guide is written for the Cold / Highland zone, which takes in Canberra, Cooma and Bright. Somewhere else? Your postcode picks the right one.

Not your zone? Cairns Brisbane Sydney Melbourne Alice Springs Perth

Also handy: will it frost this week? and what grows in shade.

Broccoli

Photo: Wikimedia Commons

Broccoli is a cool-season brassica that produces a large central head followed by smaller side-shoots over several weeks. It is one of the most nutritious vegetables available and grows well across most Australian zones during the cooler months. The key to success is timing (avoiding heat-induced bolting) and managing the ever-present Cabbage White Butterfly.

Planting Calendar for Cold / Highland

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
S/T S/T T - - - - S S/T S/T S/T S/T

S = Seed Tray   T = Transplant   D = Direct Sow

Want a nudge when it is Broccoli sowing time in Canberra?

One email a week with what is worth planting in the Cold / Highland zone right now, Broccoli included, plus which veg has jumped in price at the supermarket. Free, and you can stop it in one click.

Current Growing Conditions

Soil temperature: 11.2°C (optimal range: 10–30°C) ✓ Ready to plant

Modelled from Open-Meteo forecast (Canberra), not a live sensor.

How to Grow Broccoli in Cold / Highland Australia

When to Plant

Sow in trays under cover September-February. Transplant out after last frost. Short growing season limits to one main crop.

Soil
Rich, moisture-retentive loam with plenty of compost and well-rotted manure. Firm soil preferred. Brassicas dislike loose, fluffy beds.
pH Range
6.0-7.0
Sunlight
Full sun (minimum 6 hours). Tolerates partial afternoon shade in warmer zones.
Spacing
45cm apart, 60cm between rows
Watering
Consistent deep watering 2-3 times weekly. Brassicas are shallow-rooted and stress quickly in dry conditions. Inconsistent watering causes hollow stems and poor head formation. Drip irrigation or soak

Companion plants: Celery, Onion, Chamomile, Dill, Rosemary, Sage

Avoid planting near: Strawberry, Tomato, Capsicum, Other brassicas (rotation)

Cold / Highland Growing Tips for Broccoli

Recommended Varieties

  • Waltham 29
  • Marathon
  • Purple Sprouting
  • Belstar

Key Challenges

  • Short frost-free window
  • Hard frosts kill immature plants
  • Slow growth at altitude

Pro Tips

  • Start seeds indoors/under cover to maximise growing season
  • Cloches and frost cloth extend the season both ends
  • Purple Sprouting types that overwinter are excellent here

Harvesting Broccoli

When ready: Central head should be 10-15cm diameter with tight, dark green buds. Harvest BEFORE any yellow flowers appear. Individual buds should be compact and firm, not swollen or loose.

How to harvest: Cut main head with 10-15cm of stem attached using a sharp knife, cutting at an angle to shed water from the cut surface. LEAVE THE PLANT IN THE GROUND - side shoots will develop from leaf axils and produce smaller broccoli heads for 4-8 weeks after main head harvest.

Worth growing?

A 2.4 m × 1.2 m bed fits 6 plants, about $15 worth at today’s Aldi and Coles prices, checked today.

That is roughly 3 kg at $5.00 a kilo.

Draw your broccoli bed → No account needed.

Common Broccoli Pests in Cold / Highland Zones

Cabbage Aphids, risk: MODERATE (score: 54/100)

Organic prevention: Install netting BEFORE you see the first butterfly. Once eggs are laid under netting, you've trapped the problem inside. Inspect leaf undersides weekly for yellow egg clusters and remove immediately.

View all pest alerts →

Where to next

What broccoli costs in the shops right now, retailer by retailer, updated daily.

Also worth sowing in the cold and highland zone this September: Sweet Corn, Beetroot, Chilli Peppers and Snow Peas.

The pest most likely to find your broccoli: Cabbage White Butterfly.

Supermarket Price

Current average retail: $5.00/kg (12-month range: $3.49–$7.90)

Grow your own and save on grocery bills.

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Common Questions About Broccoli

When do you plant broccoli in Australia?

It depends on your climate zone, not the calendar month alone. Planting months by zone:

Does broccoli grow all year round in Canberra?

No. In the Cold / Highland zone the planting months are Jan to Mar, Aug to Dec. Outside that window it either bolts, sulks or gets cut down by the weather.

Which zone am I in?

Type your postcode into the box under the heading and the page tells you, and links this crop in your own zone if it differs. Or look it up on the grow zone map. This page is the Cold / Highland zone, Canberra is its reference city.