When to Plant Spinach in Sydney, Warm Temperate Guide

Sow March to October. 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 Spinach guide is written for the Warm Temperate zone, which takes in Sydney, Newcastle and Wollongong. Somewhere else? Your postcode picks the right one.

Not your zone? Cairns Brisbane 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 Warm Temperate

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

S = Seed Tray   T = Transplant   D = Direct Sow

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Current Growing Conditions

Soil temperature: 17.0°C (optimal range: 4–25°C) ✓ Ready to plant

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

How to Grow Spinach in Warm Temperate Australia

When to Plant

February-May (autumn) and August-September (late winter). Autumn sowing most reliable. Bolts in warm spring weather.

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)

Warm Temperate Growing Tips for Spinach

Recommended Varieties

  • Bloomsdale Long Standing
  • Winter Giant
  • Viroflay
  • Baby Spinach varieties
  • Matador

Key Challenges

  • Spring bolting as days lengthen
  • Downy mildew in cool wet spells

Pro Tips

  • Autumn sowing (March-April) is the most reliable for Sydney
  • Choose bolt-resistant varieties for late-season plantings
  • Part shade significantly extends the productive window

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.

Common Spinach Pests in Warm Temperate Zones

Leaf Miners, risk: MODERATE (score: 41/100)

Organic prevention: Avoid excess nitrogen. Grow flowering companions. Check plants regularly.

View all pest alerts →

Where to next

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

Also worth sowing in the warm temperate zone this September: Ginger, Beetroot, Chilli Peppers and Cucumber.

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 Sydney?

No. In the Warm Temperate zone the planting months are Mar to Oct. 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 Warm Temperate zone, Sydney is its reference city.