When to plant spinachin Melbourne.

Growing spinach in Melbourne: the specifics

Melbourne is famous for having four seasons in one day, and its vegetable gardens reflect this unpredictability. Sitting in a cool-temperate zone, Melbourne endures cold, wet winters with regular frosts in outer suburbs, and dry, hot summers that can push past 40°C. The spring and autumn shoulder seasons are the sweet spot: mild temperatures make September-November and March-May the most productive planting windows for home gardeners. For spinach, the productive window in Melbourne is february-may, august-october. Within that window, Spinach is one of the fastest crops you can grow in an Australian raised bed, baby leaves can be ready in just 25 days, making it ideal for filling gaps between other plantings. It demands cool weather and will bolt to seed rapidly when temperatures climb above 25°C. Sow seeds direct 1-2cm deep in rows 25cm apart, or scatter broadcast-style for baby leaf production. Thin to 15cm spacing when plants are 5cm tall, using thinnings as microgreens in salads. Spinach germinates best at soil temperatures of 7-18°C, in late summer, pre-chill seeds in the refrigerator for a week before sowing to improve germination. Choose variety carefully: 'Bloomsdale' and 'Tyee' are the classic Australian standards with crinkled leaves and good bolt-resistance; 'Baby Spinach' types are grown dense and harvested young; 'Winter Giant' is particularly productive in cool climates. Spinach benefits from soil with slightly higher pH (6.5-7.5) than most vegetables, add garden lime if your bed is acidic. Feed with a high-nitrogen fertiliser every 2-3 weeks for lush leaf production. Harvest outer leaves regularly to encourage new growth from the centre. In warmer months, substitute Asian spinach varieties (Malabar spinach, water spinach) or silverbeet, which are heat-tolerant alternatives.

Sizing it for your household

Sow a 1m row every 3 weeks through winter for a family of 4; or maintain 15-20 plants at various growth stages Ongoing, 100-300g per plant over the season. 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 15 cm spacing (with 25 cm between rows) means a standard 1.2 m × 2.4 m raised bed in Melbourne can hold 76 spinach 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 Melbourne

Good companions for spinach include Strawberry, Peas, Beans, Celery. In Melbourne’s temperate/cool climate, these pairings reduce pest pressure and improve pollination. Keep spinach away from competing root crops, they fight for the same nutrients or attract shared pests.

Melbourne-specific tips

• Melbourne's notorious 'four seasons in one day' weather means always have frost cloth ready from April through October, sudden cold snaps can damage tender seedlings even in spring.
• The dry, hot northerly winds in summer (particularly January-February) can desiccate plants overnight, water in the morning and mulch heavily.
• Melbourne's cold winters are perfect for broad beans and garlic, both need cool temperatures to produce well, making April-June planting essential.

Common problems

Downy mildew is the most serious spinach disease in humid Australian conditions, choose resistant varieties and ensure airflow by thinning adequately. Leaf miners leave pale tunnels in leaves; remove affected leaves and destroy them. Aphids are common on new growth, treat with insecticidal soap or neem oil. Bolting (going to seed) occurs when day length exceeds 14 hours or temperatures rise, harvest aggressively or remove bolting plants.

Harvest

Harvest outer leaves from the base of the plant when 10-15cm long, leaving the growing centre intact. Baby spinach can be cut with scissors 2-3cm above the soil for cut-and-come-again harvests. Harvest in the morning for maximum freshness. Refrigerate immediately after harvest to retain texture and nutrition.