When to plant peasin Adelaide.

Growing peas in Adelaide: the specifics

Adelaide shares Perth's Mediterranean climate but with slightly cooler winters and a more distinct spring growing season. Hot, dry summers can exceed 40°C during heatwaves, while winters are mild with reliable rainfall. The Adelaide Hills just east of the city experience noticeably cooler conditions with light frosts, while the plains and coastal suburbs rarely frost. Spring and autumn are Adelaide's gardening goldilocks zones, warm enough for most vegetables, cool enough for quality harvests. For peas, the productive window in Adelaide is march-august. Within that window, Peas are a cool-season crop and one of the few vegetables that can be planted in the depths of winter in most Australian climates. They prefer temperatures between 10°C and 21°C and will stop producing in summer heat. In subtropical and temperate Australia, they are a classic winter crop sown from March to August. Direct sow pea seeds 3-4cm deep in well-prepared raised bed soil enriched with compost. Unlike many vegetables, peas do not benefit from nitrogen fertiliser, they manufacture their own through root nodule bacteria. If growing peas in a new bed, inoculate seeds with rhizobium inoculant (available from garden centres) to ensure effective nitrogen fixation. Install a trellis or pea netting at least 1-1.5m tall for climbing types like 'Telephone', 'Alderman', and 'Purple Podded'. Shorter varieties like 'Greenfeast' and 'Massey Gem' need only 60-90cm support. Snow peas ('Oregon Sugar Pod') and sugar snap peas ('Sugar Snap', 'Sugarbon') grow to 1-1.5m and are highly productive in Australian gardens. Sow peas thickly, they are inexpensive and a good germination rate is essential. Space seeds 6-8cm apart in rows 30cm apart. Peas are sensitive to root disturbance so are best direct sown; they do not transplant well. Once flowering begins, pick pods regularly to encourage continuous production. A mulch of straw or pea straw helps keep soil cool and moist. Do not overfeed, excess nitrogen produces leafy, unproductive plants. Water at the base to prevent powdery mildew.

Sizing it for your household

Sow 3-4m of row for a family of 4; succession sow every 3 weeks through winter 50-150g per plant; 1-2kg per metre of row. Plant Planner does this maths automatically once you tell it your household size, it’s the part most planners get wrong because they assume every household is the same.

The 8 cm spacing (with 30 cm between rows) means a standard 1.2 m × 2.4 m raised bed in Adelaide can hold 120 peas plants at maximum density, though in practice you’ll want to mix companions in, so plan for roughly 60-70% of that.

Companion plants for Adelaide

Good companions for peas include Carrot, Radish, Turnip, Lettuce. In Adelaide’s mediterranean/temperate climate, these pairings reduce pest pressure and improve pollination. Keep peas away from Onion, Garlic, Chives, they fight for the same nutrients or attract shared pests.

Adelaide-specific tips

• Adelaide's extreme summer heatwaves (40°C+) can kill vegetable plants within hours, keep shadecloth on hand and water deeply the day before forecast heatwaves.
• The Adelaide Hills is its own microclimate, if you garden above 400m, treat your conditions more like Canberra and expect frosts from June to September.
• Adelaide's low summer rainfall means drip irrigation is essential, hand-watering raised beds in 38°C heat is exhausting and inefficient.

Common problems

Powdery mildew is the most common pea problem in Australian gardens, coating leaves with white powder as temperatures warm, choose resistant varieties and ensure good airflow. Pea weevil (Bruchus pisorum) lays eggs near pods and larvae develop inside seeds; inspect regularly. Aphids colonise tender growing tips, blast off with water or apply insecticidal soap. Root rot occurs in waterlogged raised beds, ensure excellent drainage.

Harvest

Harvest shelling peas when pods are swollen and green but before they start to lose colour or feel loose. Taste test, they should be sweet. Snow peas are harvested when flat, pods fully formed but peas not yet visible. Sugar snaps are best at 7-8cm when the pod walls are thick and sweet. All types should be picked regularly to prolong production.