When to Plant Lettuce in Sydney, Warm Temperate Guide

Sow year round in Sydney. That includes right now, in September.

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

This Lettuce 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.

Lettuce

Photo: Wikimedia Commons

Lettuce is the most commonly grown salad green in Australian home gardens. Available in four main types: crisphead (iceberg), cos/romaine, butterhead, and loose-leaf. It is a cool-season crop that bolts rapidly in heat, making variety selection and planting timing critical. Fast-growing (4-8 weeks to harvest) and adaptable to containers, garden beds, and even part shade.

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 S/T/D S/T/D S/T/D S/T/D S/T/D

S = Seed Tray   T = Transplant   D = Direct Sow

You can sow lettuce in any month in Warm Temperate, but the months are not equal. Summer heat brings faster bolting and heavier pest pressure, so pick a heat tolerant variety, sow little and often, and give afternoon shade from December through February.

Want a nudge when it is Lettuce sowing time in Sydney?

One email a week with what is worth planting in the Warm Temperate zone right now, Lettuce 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: 17.0°C (optimal range: 5–25°C) ✓ Ready to plant

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

How to Grow Lettuce in Warm Temperate Australia

When to Plant

Year-round in mild microclimates. Best February-November. December-January challenging even with heat-tolerant types.

Soil
Light, well-drained soil enriched with compost. Lettuce has shallow roots and prefers loose, friable soil.
pH Range
6.0-7.0
Sunlight
Full sun in cool seasons. Part shade essential in warm zones and during warm months to delay bolting.
Spacing
25cm apart, 30cm between rows
Watering
Light, frequent watering to keep soil consistently moist. Shallow roots dry out quickly. Morning watering preferred. Drip irrigation or soaker hose ideal. Avoid overhead watering to prevent disease.

Companion plants: Carrot, Radish, Strawberry, Chive, Onion, Marigold

Avoid planting near: Celery (some allelopathic evidence), Parsley (competes for same nutrients)

Warm Temperate Growing Tips for Lettuce

Recommended Varieties

  • Cos (Green Towers, Little Gem)
  • Buttercrunch
  • Oakleaf varieties
  • Iceberg (Great Lakes)
  • Red Mignonette

Key Challenges

  • Summer heat limits choices to loose-leaf types
  • Bolting in exposed positions
  • Aphids

Pro Tips

  • Sydney's mild climate allows near year-round lettuce growing
  • Succession sow for continuous supply
  • Cos types are the most versatile for Sydney conditions

Harvesting Lettuce

When ready: Loose-leaf: when leaves are 10-15cm (baby) or 20cm+ (full size). Heading types: when head is firm and full-sized. Cos: when upright head is dense. Harvest before any signs of flower stalk elongation (bolting).

How to harvest: Cut-and-come-again: cut outer leaves at base for loose-leaf types. Whole head: cut at soil level with sharp knife in cool of morning. For cos, can harvest outer leaves or whole head.

Common Lettuce Pests in Warm Temperate Zones

Aphids, risk: MODERATE (score: 41/100)

Organic prevention: Water in morning so soil is dry at night. Keep mulch light and away from plants. Remove hiding spots (boards, dense ground cover). Raise seedlings in pots until robust enough to withstand damage.

View all pest alerts →

Where to next

What lettuce 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 lettuce: Botrytis / Grey Mould.

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Common Questions About Lettuce

When do you plant lettuce in Australia?

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

Does lettuce grow all year round in Sydney?

Yes, every month is on the calendar for the Warm Temperate zone, though not every month is equally easy.

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.