When to Plant Cassava in Brisbane, Subtropical Guide
What this month normally looks like in Subtropical
In October the Subtropical zone normally runs 27°C by day and 15°C overnight, with about 77 mm of rain over 7 wet days. The coldest October night on record across the zone was -0.2°C, so a late frost is not out of the question. Averages 1991 to 2026, 33 postcodes, SILO.
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This Cassava guide is written for the Subtropical zone, which takes in Brisbane, the Gold Coast and the Sunshine Coast. Somewhere else? Your postcode picks the right one.
Not your zone? Cairns Sydney Melbourne Canberra Alice Springs Perth
Also handy: will it frost this week? and what grows in shade.
- Planting window
- Sep to Dec
- Days to harvest
- about 43 weeks
- Sun
- Full sun
- Water
- Regular
- Spacing
- 100 cm apart
- Soil pH
- 5.5–6.5
Cassava is a tropical shrub grown for its starchy roots. You plant it from stem cuttings, and it needs a long, warm, frost free season. Expect to wait 8 to 18 months for a crop.
Published · By GardenBuddy.au
Planting dates, current conditions and prices on this page update daily.
Photo: Wikimedia Commons
Best Planting Window for Subtropical
- Jan -
- Feb -
- Mar -
- Apr -
- May -
- Jun -
- Jul -
- Aug -
- Sep P
- Oct P
- Nov P
- Dec P
P = Planting window
Green Harvest says plant in the warmer months in the subtropics. We have used September to December, when frost risk has passed. A cool winter slows growth and frost kills the stems, so expect a long, slow crop and mulch heavily over the first winter. No Australian source gave subtropical months.
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How to Grow Cassava in Subtropical Australia
- Soil
- Sandy loam with good drainage (Rob Pyne). Waterlogged soil rots the roots.
- Salt
- Moderately sensitive. Copes with a little salt, but the harvest drops on salty bore water.
- pH Range
- 5.5-6.5
- Sunlight
- Full sun, at least 6 hours a day (Rob Pyne).
- Spacing
- 100cm apart, 100cm between rows
- Watering
- Water cuttings until they shoot. Established plants are tolerant of dry spells, but regular water improves root size. No source gives amounts.
- Good companions
- Dwarf Beans, Peas, Peanut, Pigeon Pea
- Keep away from
- Potato
- Grow before it
- Fruiting crops (Tomato, Capsicum, Zucchini)
- Grow after it
- Legumes (Beans - Dwarf, Peas, Broad Beans)
Give the bed 3 turns before root crops go back in. Roots fork and go leafy in fresh manure, so they take the bed after the heavy feeders have used it.
Subtropical Growing Tips for Cassava
Key Challenges
- Winter cold and frost
- Slow growth below 15°C
- A long wait for a crop
Pro Tips
- Plant in the warmest, most sheltered spot
- Mulch heavily in the first winter
- Expect a crop in 10 to 12 months or more
Pests and problems for Cassava in Subtropical
Harvesting Cassava
When ready: The leaves yellow and fall (Green Harvest). Early varieties take 8 to 10 months, sweet types 10 to 12, late types 12 to 18 (Rob Pyne).
How to harvest: Lift the roots with a fork. Green Harvest says the roots store well.
What members get
- Soil and weather from your nearest station
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- Price history and price alerts
- Pest risk alerts for your area
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Common Questions About Cassava
When do you plant cassava in Australia?
It depends on your climate zone, not the calendar month alone. Planting months by zone:
- Tropical (Cairns): all year
- Subtropical (Brisbane): Sep to Dec
- Warm Temperate (Sydney): Oct to Nov
- Cool Temperate (Melbourne): not recommended
- Cold / Highland (Canberra): not recommended
- Arid / Semi-Arid (Alice Springs): not recommended
- Mediterranean (Perth): not recommended
When should I plant Cassava in Brisbane?
Green Harvest says plant in the warmer months in the subtropics. We have used September to December, when frost risk has passed. A cool winter slows growth and frost kills the stems, so expect a long, slow crop and mulch heavily over the first winter. No Australian source gave subtropical months.
How do I know when Cassava are ready to harvest?
The leaves yellow and fall (Green Harvest). Early varieties take 8 to 10 months, sweet types 10 to 12, late types 12 to 18 (Rob Pyne).
What grows well with Cassava?
Good companion plants for Cassava include: Dwarf Beans, Peas, Peanut, Pigeon Pea.
Are cassava salt tolerant?
Only a little. Cassava are moderately sensitive to salt, so the harvest drops on salty bore water. Mix salty water with rainwater, and mulch the bed.
Which zone am I in?
Type your postcode into the box near the top of the page and it 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 Subtropical zone, Brisbane is its reference city.