When to Plant Asparagus Pea (Winged Bean) in Perth, Mediterranean Guide

Sow September to January. Right now in September you can sow.

Published · Last reviewed · By Garden Buddy
Growing advice is reviewed by hand. Planting dates, current conditions and prices on this page update daily.

This Asparagus Pea (Winged Bean) guide is written for the Mediterranean zone, which takes in Perth, Adelaide and Bunbury. Somewhere else? Your postcode picks the right one.

Not your zone? Cairns Brisbane Sydney Melbourne Canberra Alice Springs

Also handy: will it frost this week? and what grows in shade.

Two distinct plants are sold under these names in Australia. The true Winged Bean (Psophocarpus tetragonolobus) is a vigorous tropical climber where all parts are edible. The Asparagus Pea (Lotus tetragonolobus) is a small temperate annual with winged pods. This guide covers both, clearly distinguishing them. The Winged Bean is the more useful food crop but is strictly tropical/subtropical.

Planting Calendar for Mediterranean

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
D - - - - - - - D D D D

S = Seed Tray   T = Transplant   D = Direct Sow

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Current Growing Conditions

Soil temperature: 15.9°C (optimal range: 22–35°C) ✗ Outside optimal range

Modelled from Open-Meteo forecast (Perth), not a live sensor.

How to Grow Asparagus Pea (Winged Bean) in Mediterranean Australia

When to Plant

Asparagus Pea: Sow September-November. Winged Bean: Marginal. Try in the warmest spot available, sow November-December.

Soil
Well-drained, fertile loam enriched with compost. Winged Bean tolerates poor soils due to nitrogen fixation. Asparagus Pea prefers lighter, sandy soils.
pH Range
5.5-7.0
Sunlight
Full sun (minimum 6 hours). Winged Bean requires short days to flower in many varieties.
Spacing
30cm apart, 60cm between rows
Watering
Regular deep watering during flowering and pod development. Winged Bean is moderately drought tolerant once established but produces best with consistent moisture.

Companion plants: Corn, Sweet Potato, Cucumber

Avoid planting near: Onions, Garlic, Other Alliums

Mediterranean Growing Tips for Asparagus Pea (Winged Bean)

Recommended Varieties

  • Asparagus Pea (Lotus tetragonolobus)
  • Winged Bean (in warm microclimate only)

Key Challenges

  • Winged Bean may not flower before autumn cool
  • Dry summers require irrigation

Pro Tips

  • Asparagus Pea is more reliable here than Winged Bean
  • Mediterranean climate suits Asparagus Pea well. It originates from similar climates
  • Harvest Asparagus Pea pods very young (2-3cm) for best eating

Harvesting Asparagus Pea (Winged Bean)

When ready: Winged Bean: Pods ready when 7-10cm long, still bright green and snap crisply. Wings (flanges) should be flexible, not tough. Asparagus Pea: Harvest at 2-3cm maximum length. Larger pods are woody and inedible.

How to harvest: Pick pods individually with a gentle twist or cut with scissors. Harvest every 2-3 days to encourage continued production. For Winged Bean tubers, dig after vine dies back at end of season.

Where to next

Also worth sowing in the mediterranean zone this September: Ginger, Beetroot, Chilli Peppers and Cucumber.

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Common Questions About Asparagus Pea (Winged Bean)

When do you plant asparagus pea in Australia?

It depends on your climate zone, not the calendar month alone. Planting months by zone:

Does asparagus pea grow all year round in Perth?

No. In the Mediterranean zone the planting months are Jan, Sep to Dec. Outside that window it either bolts, sulks or gets cut down by the weather.

Which zone am I in?

Type your postcode into the box under the heading and the page tells you, and links this crop in your own zone if it differs. Or look it up on the grow zone map. This page is the Mediterranean zone, Perth is its reference city.