When to Plant Lettuce in Canberra — Cold / Highland Guide
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
| 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 | S/T/D | S/T/D | S/T/D | S/T/D |
S = Seed Tray T = Transplant D = Direct Sow
Current Growing Conditions
Soil temperature: 18.9°C (optimal range: 5–25°C) ✓ Ready to plant
How to Grow Lettuce in Cold / Highland Australia
When to Plant
October-March. Short but productive season. Start in trays under cover from September.
- 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)
Cold / Highland Growing Tips for Lettuce
Recommended Varieties
- Winter Density
- All Year Round
- Cos
- Buttercrunch
Key Challenges
- Frost kills young plants
- Short growing season
- Slow growth in cool temperatures
Pro Tips
- Start seedlings in greenhouse or cold frame
- Frost cloth extends season by weeks at both ends
- Direct sow after last frost for simplicity
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 Cold / Highland Zones
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.
Supermarket Price
Current average retail: $15.01/kg (range: $8.25–$24.50)
Grow your own and save on grocery bills.
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