When to Plant Spinach in Brisbane, Subtropical Guide

Sow April to August. Right now in September it is out of season. The next sowing month is April.

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

This Spinach guide is written for the Subtropical zone, which takes in Brisbane, the Gold Coast and the Sunshine Coast. Somewhere else? Your postcode picks the right one.

Not your zone? Cairns Sydney Melbourne Canberra Alice Springs Perth

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

Spinach

Photo: Wikimedia Commons

True spinach (English spinach) is a cool-season annual prized for its tender, dark green leaves. It is one of the most nutritious leafy greens but also one of the most temperamental to grow in Australian conditions. It bolts rapidly in heat and long day-lengths, making it primarily an autumn-winter-early spring crop across most of Australia. Understanding this limitation is key to successful growing.

Planting Calendar for Subtropical

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

S = Seed Tray   T = Transplant   D = Direct Sow

Want a nudge when it is Spinach sowing time in Brisbane?

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Current Growing Conditions

Soil temperature: 20.4°C (optimal range: 4–25°C) ✓ Ready to plant

That figure is read off my own weather station here at Dayboro in South East Queensland at 18:55 yesterday, not a model. The radar, the rain gauge and the forecasts behind it sit on Dayboro.au.

How to Grow Spinach in Subtropical Australia

When to Plant

March-August. Peak sowing April-June. Bolts from August onwards. Short productive window of 4-6 weeks per sowing.

Soil
Rich, well-drained soil heavily enriched with compost and well-rotted manure. Spinach is a heavy feeder that demands fertile soil.
pH Range
6.0-7.5
Sunlight
Full sun in cool weather. Part shade beneficial in all but the coldest zones. Shade delays bolting.
Spacing
20cm apart, 30cm between rows
Watering
Consistent moisture essential. Light, frequent watering keeps soil evenly moist. Drought stress triggers bolting. Morning watering. Drip irrigation ideal.

Companion plants: Strawberry, Pea, Bean, Celery, Cauliflower, Radish

Avoid planting near: Beetroot (same family; shared pests and diseases)

Subtropical Growing Tips for Spinach

Recommended Varieties

  • Bloomsdale Long Standing (bolt-resistant)
  • Winter Giant
  • Baby Spinach varieties
  • Perpetual Spinach (actually a silverbeet, but marketed as spinach)

Key Challenges

  • Very narrow growing window
  • Bolts from August-September as days lengthen
  • Downy mildew in humid winter weather

Pro Tips

  • Succession sow every 2 weeks from March for continuous supply through winter
  • Bloomsdale Long Standing is the best bolt-resistant variety for SEQ
  • Perpetual Spinach (actually Beta vulgaris, a silverbeet) is far more reliable year-round

Harvesting Spinach

When ready: Baby spinach: leaves 5-8cm (3-4 weeks). Full size: leaves 15-20cm (6-8 weeks). Leaves should be dark green, firm, and glossy. Harvest before any sign of flower stalk elongation.

How to harvest: Cut-and-come-again: cut outer leaves at base, leaving inner leaves and growing point. Or cut entire plant 3cm above ground for one large harvest (may regrow once). Harvest in cool of morning.

Where to next

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

Also worth sowing in the subtropical zone this September: Lemongrass, Ginger, Beetroot and Chilli Peppers.

The pest most likely to find your spinach: Common Garden Snail.

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Common Questions About Spinach

When do you plant spinach in Australia?

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

Does spinach grow all year round in Brisbane?

No. In the Subtropical zone the planting months are Apr to Aug. 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 Subtropical zone, Brisbane is its reference city.