When to Plant Cucumber in Brisbane — Subtropical Guide
Photo: Wikimedia Commons
Cucumbers are warm-season cucurbits that produce prolifically in Australian summers. Three main types are grown: Lebanese (short, smooth, seedless), Continental (long, thin-skinned) and pickling/gherkin varieties. Monoecious plants with separate male and female flowers on the same vine. Cross-pollinate readily with other cucumber varieties but NOT with melons, pumpkins or zucchini.
Planting Calendar
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|
| S/T/D | S/T/D | T | — | — | — | — | 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: 23.6°C (optimal range: 18–35°C) ✓ Ready to plant
How to Grow Cucumber in Subtropical Australia
When to Plant
Sow August-March. Peak season September-February. Can succession plant every 3-4 weeks. Autumn sowings (February-March) produce well as mildew pressure drops.
- Soil
- Rich, well-drained soil with generous compost and well-rotted manure. Cucumbers are heavy feeders and need fertile, moisture-retentive soil.
- pH Range
- 6.0-7.0
- Sunlight
- Full sun (minimum 6 hours). In hot climates (tropics, arid), light afternoon shade reduces heat stress.
- Spacing
- 50cm apart, 120cm between rows
- Watering
- Heavy water demands. Deep, consistent watering at base is critical. Irregular watering causes bitter, misshapen fruit. Drip irrigation ideal. Water in morning to allow foliage to dry (reduces mildew).
Companion plants: Corn, Beans, Peas, Sunflower, Radish, Dill
Avoid planting near: Potato, Aromatic herbs (sage, mint), Melon (same family rotation issues)
Subtropical Growing Tips for Cucumber
Recommended Varieties
- Lebanese
- Burpless
- Continental (Telegraph)
- Crystal Apple (heirloom)
- Gherkin/pickling types
Key Challenges
- Powdery mildew from November
- Downy mildew in wet summers
- Pumpkin beetle on young plants
Pro Tips
- Lebanese varieties are the most reliable and productive for SEQ
- Succession sow every 3-4 weeks as older plants succumb to mildew
- Trellis growing is strongly recommended for air circulation
Harvesting Cucumber
When ready: Lebanese: 12-15cm, firm, dark green. Continental: 30-40cm, firm. Gherkins: 5-8cm for pickling. All types: harvest BEFORE seeds inside become large and hard. Overripe cucumbers are seedy, bitter and watery.
How to harvest: Cut with scissors or secateurs leaving short stem. Do not pull (damages vine). Harvest early morning when fruit is cool and firm.
Common Cucumber Pests in Subtropical Zones
Organic prevention: Row covers over young plants until flowering starts. Crop rotation. Remove cucurbit crop debris promptly after harvest.
Supermarket Price
Current average retail: $6.11/kg (range: $2.33–$13.00)
Grow your own and save on grocery bills.
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