When to Plant Lettuce in Perth, Mediterranean Guide
Soil temperature is modelled from Open-Meteo forecast (Perth), not a live sensor.
What this month normally looks like in Mediterranean
In October the Mediterranean zone normally runs 22°C by day and 10°C overnight, with about 38 mm of rain over 6 or 7 wet days. The coldest October night on record across the zone was -0.2°C, so a late frost is not out of the question. Averages 1991 to 2026, 19 postcodes, SILO.
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This Lettuce guide is written for the Mediterranean zone, which takes in Perth, Adelaide and Bunbury. Somewhere else? Your postcode picks the right one.
Not your zone? Cairns Brisbane Sydney Melbourne Canberra Alice Springs
Also handy: will it frost this week? and what grows in shade.
- Planting window
- Jan to Nov
- Days to harvest
- 30 days
- Sun
- Full sun to part shade
- Water
- Regular
- Spacing
- 25 cm apart
- Soil pH
- 6.0–7.0
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.
Published · By GardenBuddy.au
Planting dates, current conditions and prices on this page update daily.
Photo: Wikimedia Commons
Planting Calendar for Mediterranean
- Jan S
- Feb S/T/D
- Mar S/T/D
- Apr S/T/D
- May S/T/D
- Jun S/T/D
- Jul S/T/D
- Aug S/T/D
- Sep S/T/D
- Oct S/T/D (likely to bolt)
- Nov T/D (likely to bolt)
- Dec -
S = Seed Tray T = Transplant D = Direct Sow
Amber = likely to bolt if sown this month, it matures into heat or long days.
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How to Grow Lettuce in Mediterranean Australia
- Soil
- Light, well-drained soil enriched with compost. Lettuce has shallow roots and prefers loose, friable soil.
- Salt
- Moderately sensitive. Copes with a little salt, but the harvest drops on salty bore water.
- 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.
- Good companions
- Amaranth (amaranth provides shade), Dwarf Beans, Onion, Cucumber, Carrot
- Keep away from
- Celery (some allelopathic evidence), Parsley (competes for same nutrients)
- Grow before it
- Legumes (Beans - Dwarf, Peas, Broad Beans)
- Grow after it
- Fruiting crops (Tomato, Capsicum, Zucchini)
Give the bed 3 turns before leafy greens go back in. Leaf crops want the nitrogen the legumes left behind.
Mediterranean Growing Tips for Lettuce
Recommended Varieties
- Cos (all types)
- Buttercrunch
- Oakleaf varieties
- Mignonette
Key Challenges
- Summer heat and water restrictions
- Earwigs
- Slugs in wet winter
Pro Tips
- Perth and Adelaide have excellent lettuce-growing seasons April-October
- Exploit winter rainfall for minimal irrigation
- Succession sow small amounts frequently
Pests and problems for Lettuce in Mediterranean
- Aphids Moderate
- Tomato Spotted Wilt Virus Watch
- Helicoverpa / Corn Earworm / Tomato Grub Watch
- Botrytis (Grey Mould) Watch
- Mosaic Viruses Watch
- Root-knot Nematode Watch
- Thrips Watch
- Downy Mildew Avoid overhead watering. Water in morning. Space for airflow. Grow resistant varieties. Remove crop debris. Watch
- Lettuce Mosaic Virus Use certified virus-free seed. Control aphids. Remove infected plants immediately. Grow resistant varieties. Watch
- Slugs Slugs in wet winter Watch
Organic prevention (Aphids): Grow Nasonovia-resistant varieties (Nr gene). Avoid excess nitrogen. Check seedlings before planting. Floating row covers.
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.
Storing and preserving lettuce
How to keep it
- Dehydrating (for powder). Wash and dry leaves. Spread on dehydrator trays. Dry at 52C for 6-10 hours until crispy. Blitz to powder. Use as a mild green powder in smoothies. Note: texture is completely different from fresh. Keeps: 3-6 months.
- Fresh Storage. Wash, dry thoroughly in salad spinner. Wrap in paper towel, place in sealed container in fridge crisper. Or store whole unwashed heads in open plastic bag with paper towel. Keeps: 5-10 days refrigerated (varies by type; crisphead longest, loose-leaf shortest).
What lettuce costs in the shops right now, retailer by retailer, updated daily.
What members get
- Soil and weather from your nearest station
- An email when it's time to sow
- Your own garden plan, including planning from a photo
- Price history and price alerts
- Pest risk alerts for your area
- Full salt and canning detail
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:
- Tropical (Cairns): Mar to Aug Likely to bolt if sown in July and August.
- Subtropical (Brisbane): Jan to Sep Likely to bolt if sown in August and September.
- Warm Temperate (Sydney): Jan to Nov Likely to bolt if sown in October and November.
- Cool Temperate (Melbourne): all year Likely to bolt if sown in September, October, November and December.
- Cold / Highland (Canberra): Jan to Apr, Aug to Dec Likely to bolt if sown in October, November and December.
- Arid / Semi-Arid (Alice Springs): Feb to Sep Likely to bolt if sown in July, August and September.
- Mediterranean (Perth): Jan to Nov Likely to bolt if sown in October and November.
Can you grow lettuce all year round in Perth?
No. In the Mediterranean zone the planting months are Jan to Nov. Outside that window it either bolts, sulks or gets cut down by the weather. Likely to bolt if sown in October and November.
When should I plant Lettuce in Perth?
Sow all year. Summer sowings need shade and heat-tolerant types.
What soil temperature do Lettuce need?
Lettuce germinate best when soil temperature is between 5°C and 25°C.
How do I know when Lettuce are ready to harvest?
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).
What are the best Lettuce varieties for Perth?
Recommended varieties for the Mediterranean zone include: Cos (all types), Buttercrunch, Oakleaf varieties, Mignonette.
What grows well with Lettuce?
Good companion plants for Lettuce include: Amaranth, Dwarf Beans, Onion, Cucumber, Carrot.
Are lettuce salt tolerant?
Only a little. Lettuce are moderately sensitive to salt, so the harvest drops on salty bore water. Mix salty water with rainwater, and mulch the bed.
Which zone am I in?
Type your postcode into the box near the top of the page and it 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 Mediterranean zone, Perth is its reference city.