When to Plant Blueberry in Cairns, Tropical Guide
What this month normally looks like in Tropical
In October the Tropical zone normally runs 34°C by day and 23°C overnight, with about 53 mm of rain over 5 or 6 wet days. Averages 1991 to 2026, 37 postcodes, SILO.
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This Blueberry guide is written for the Tropical zone, which takes in Cairns, Townsville and Darwin. Somewhere else? Your postcode picks the right one.
Not your zone? Brisbane Sydney Melbourne Canberra Alice Springs Perth
Also handy: will it frost this week? and what grows in shade.
- Planting window
- Apr to Jun
- Sun
- Full sun to part shade
- Soil pH
- 4.5–5.5
- Shop price
- $24.38/kg
Acid-loving shrub that MUST have acidic soil (pH 4.5-5.5). Most Australian soils are too alkaline. Growing in pots with specialist acidic potting mix is the most reliable approach for most home gardeners.
Published · By GardenBuddy.au
Planting dates, current conditions and prices on this page update daily.
Photo: Wikimedia Commons
Best Planting Window for Tropical
- Jan -
- Feb -
- Mar -
- Apr P
- May P
- Jun P
- Jul -
- Aug -
- Sep -
- Oct -
- Nov -
- Dec -
P = Planting window
Only low-chill types, grown in pots of acid mix, have a realistic chance, and the elevated Tablelands suit them far better than the humid coast. Humidity brings fruit-spotting bug and grey mould.
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How to Grow Blueberry in Tropical Australia
- Soil
- ACIDIC soil, pH 4.5-5.5. This is non-negotiable. Use 50:50 peat moss and pine bark for pots. In-ground only in naturally acidic soils (rare in Australia). Add sulphur to lower pH - takes 3-6 months to work.
- Salt
- Sensitive. Struggles with salty bore water or salty soil. Give it rainwater if you can.
- pH Range
- 4.5-5.5
- Sunlight
- Full sun to part shade. Morning sun with afternoon shade ideal in hot zones. At least 6 hours direct sun for best fruiting.
- Good companions
- Strawberry (woodland types), Dwarf Beans, Lettuce, Cucumber, Tomato
- Keep away from
- Lime-loving plants, Concrete paths (leach alkalinity into soil)
Tropical Growing Tips for Blueberry
Recommended Varieties
- Southern highbush: Sunshine Blue, Misty, O'Neal
- Rabbiteye types need more chill than the tropics give
Key Challenges
- Excessive heat
- No chill hours
- Difficult to maintain acidic soil
- High disease pressure
Pro Tips
- Honestly, blueberries are a poor choice for tropical zones. If you must try, use pots with acidic mix in a position with morning sun and afternoon shade. Expect poor yields.
Pests and problems for Blueberry in Tropical
Harvesting Blueberry
When ready: Berries turn fully blue/purple, then wait 3-5 more days. Ripe berries detach with a gentle roll of the thumb, no tugging needed. Taste test: sweet with slight tartness.
How to harvest: Pick by hand, rolling berries gently off cluster. Harvest every 2-3 days as berries ripen unevenly. Early morning harvest for best quality.
Storing and preserving blueberry
How to keep it
- Freezing. Spread unwashed berries on tray, freeze solid, transfer to bags. Do not wash before freezing. Keeps: 12 months.
- Dehydrating. Spread on dehydrator trays. Dry at 55°C for 12-18 hours until wrinkled and chewy. Keeps: 12 months.
- Jam. Simmer berries with sugar (1:1 by weight) and lemon juice. Boil to setting point (105°C). Jar hot. Keeps: 12 months.
- Blueberry sauce/coulis. Simmer berries with sugar and lemon juice until thick. Strain if desired. Bottle hot or freeze in portions. Keeps: 6 months frozen.
What blueberry costs in the shops right now, retailer by retailer, updated daily.
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- Soil and weather from your nearest station
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Common Questions About Blueberry
When do you plant blueberry in Australia?
It depends on your climate zone, not the calendar month alone. Planting months by zone:
- Tropical (Cairns): Apr to Jun
- Subtropical (Brisbane): Mar to May
- Warm Temperate (Sydney): May to Aug
- Cool Temperate (Melbourne): Jun to Aug
- Cold / Highland (Canberra): May to Sep
- Arid / Semi-Arid (Alice Springs): Apr to Jun
- Mediterranean (Perth): May to Aug
When should I plant Blueberry in Cairns?
Only low-chill types, grown in pots of acid mix, have a realistic chance, and the elevated Tablelands suit them far better than the humid coast. Humidity brings fruit-spotting bug and grey mould.
How do I know when Blueberry are ready to harvest?
Berries turn fully blue/purple, then wait 3-5 more days. Ripe berries detach with a gentle roll of the thumb, no tugging needed. Taste test: sweet with slight tartness.
What are the best Blueberry varieties for Cairns?
Recommended varieties for the Tropical zone include: Southern highbush: Sunshine Blue, Misty, O'Neal, Rabbiteye types need more chill than the tropics give.
What grows well with Blueberry?
Good companion plants for Blueberry include: Strawberry, Dwarf Beans, Lettuce, Cucumber, Tomato.
Are blueberry salt tolerant?
No. Blueberry are salt-sensitive, one of the more sensitive veggies. Use rainwater if your bore water is salty, or grow them in a raised bed of fresh mix if your soil is.
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 Tropical zone, Cairns is its reference city.