When to plant spinachin Perth.

Growing spinach in Perth: the specifics

Perth has a classic Mediterranean climate, hot, dry summers and mild, wet winters, giving it a completely different growing rhythm to the east coast. The long, dry summer (November-April) demands water-wise gardening and heat-hardy varieties, while the cooler months from May to October are Perth's prime growing season. Perth's warm winters mean brassicas, leafy greens, and tomatoes can all produce through the cooler months without frost damage. For spinach, the productive window in Perth 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 Perth 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 Perth

Good companions for spinach include Strawberry, Peas, Beans, Celery. In Perth’s mediterranean/temperate 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.

Perth-specific tips

• Perth's dry summers require drip irrigation or soaker hoses rather than overhead watering, conserve water and reduce fungal disease risk simultaneously.
• Unlike east coast cities, Perth's best tomato planting window is actually August-October for a summer harvest, with a second planting possible in late February.
• Perth's Mediterranean summers are too hot and dry for most leafy greens, focus on heat-tolerant herbs (rosemary, thyme, oregano) and water-efficient crops like sweet potato in summer.

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.