When to plant Spinach in Subtropical Australia

Subtropical zone — applies to Brisbane, Gold Coast, Sunshine Coast, Coffs Harbour, Lismore and similar areas. Growing elsewhere? Temperate · Cool · Tropical · Arid.

Sow spinach direct from April through June across the subtropics, dropping seed straight into its final bed rather than transplanting. This is a cool-season crop for Brisbane and the Sunshine Coast, and the autumn-to-winter window keeps it clear of the heat that sends it racing to seed. Germination is slow and uneven, taking anywhere from 10 to 25 days, so keep the surface consistently moist and don't give up on a patchy row too early. From sowing you'll be picking leaves in roughly 50 to 70 days. Set seed about 8 mm deep and thin plants to 25–35 cm so each has room to bulk up.

Sowing calendar — subtropical zone

Green months are your sowing window: April to June.

Growing notes

True spinach is fundamentally a winter crop here — the humid warmth of a subtropical summer pushes it to bolt and turn bitter within weeks, which is exactly why the April-to-June window matters. An early April sowing gives the longest leafy run before the shortest days slow growth, while a June sowing is slower but stays sweeter through the cold. Give it a well-drained bed enriched with compost, full winter sun, and steady moisture, because a dry spell triggers bolting as surely as heat does.

The recurring failure in warmer inland gardens around Lismore is a late sowing that runs into the first mild spring days and bolts before you've had a decent harvest. Pick outer leaves regularly and aim to have the crop off before September warmth arrives. In wetter coastal gardens, downy mildew shows as yellow patches with grey fuzz beneath the leaf; space plants properly and water at the base in the morning so foliage dries before nightfall.

• Sow small batches every three weeks for a continuous supply
• Thin seedlings early to the full 25–35 cm spacing
• Harvest outer leaves first to extend each plant's life
• Water in the morning, at soil level, to limit mildew

Spinach at a glance

Companion planting

Grows well with

Strawberries: Efficient ground cover; strawberries provide light shade for spinach

Peas: Peas fix nitrogen for spinach; efficient vertical/horizontal use

Common questions

When should I plant spinach in a subtropical climate?

Sow spinach direct between April and June, through autumn and into early winter. This keeps the plants in cool weather and away from the summer humidity that makes them bolt.

Why does my spinach keep going to seed?

Warm days and dry soil both trigger bolting in true spinach. Sowing within the autumn-to-winter window and keeping the moisture steady is the surest way to delay it.

Can I grow spinach through a Brisbane summer?

Not reliably. The heat and humidity make it bolt within weeks, so summer is better spent on Malabar or Ceylon spinach and true spinach saved for the cool months.

How long does spinach take to be ready to pick?

Around 50 to 70 days from sowing, though you can start taking outer leaves a little earlier once plants are established.

Keep exploring