When to plant Peas in Tropical Australia

Tropical zone — applies to Darwin, Cairns, Townsville, Broome, Mackay and similar areas. Growing elsewhere? Temperate · Cool · Subtropical · Arid.

Peas get exactly two sowing months in the tropics: April and May, direct into the ground 30–50 mm deep as the dry season begins. The window is tight because the crop is slow — 84 to 126 days to maturity — and pods must fill during the coolest stretch of the year; a June sowing in Townsville would still be climbing its trellis as the October heat arrives. Germination is quick at 7–14 days, so most of the wait is growing time. Sow the whole patch at once, 15–20 cm apart in rows 50 cm apart, rather than gambling on succession sowings you do not have time for.

Sowing calendar — tropical zone

Green months are your sowing window: April to May.

Growing notes

Everything about tropical peas comes back to that 84–126 day maturity figure. An April sowing in Darwin or Townsville flowers and fills through July and August, the mildest weeks of the year, and can still be picking in early spring; a May sowing works but leaves no slack. The narrow window is not a rule for its own sake — pea flowers abort and mildew takes over once heat and humidity return, so late crops simply run out of season.

Sow deep (30–50 mm) into moist soil, then resist watering until seedlings emerge at 7–14 days; this is not cold-climate advice — tropical soil is warm, and wet seed rots fast. Drainage matters even in the dry, so choose a raised or free-draining bed. Do not feed nitrogen, since peas fix their own, but a dusting of lime helps on the acid soils common along the wet-tropics coast. The signature failure is powdery mildew sweeping the vines white from August onwards as the days warm; you cannot hold it off forever, so plant at the start of the window, keep water off the foliage, and treat mildew's arrival as the signal to strip everything remaining. Taller types want their trellis in place at sowing — driving stakes in later tears the shallow roots.

Peas at a glance

Companion planting

Grows well with

Carrot: Peas fix nitrogen that benefits carrots; good space use

Lettuce: Peas fix nitrogen for lettuce; provide light shade in summer

Mint: Deters aphids and pea moth

Keep away from

Garlic: Alliums inhibit nitrogen-fixing bacteria in legume roots

Onion: Alliums inhibit legume growth

Onion: Alliums inhibit legume growth

Common questions

When can you grow peas in the tropics?

Sow direct in April or May only. The crop needs 84–126 days and must mature during the cool dry season, so there is no second window.

Why are my pea plants covered in white powder?

Powdery mildew, which arrives as the dry season warms from August. Keep water off the foliage, and once it takes hold pick everything that is ready — the crop is finishing.

Can I grow peas in Darwin?

Yes. Sow in April or early May and the crop will flower and pick through the mild dry-season months of June to August.

How deep should pea seed be sown?

Sow 30–50 mm deep into moist soil and hold off watering until seedlings emerge in 7–14 days, because seed sitting in warm wet soil rots quickly.

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