When to Plant Citron 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 Citron 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
- Mar to May, Sep to Oct
- Days to harvest
- about 129 weeks
- Sun
- Full sun
- Soil pH
- 6.0–7.5
Citron is a frost-tender, semi-dwarf evergreen citrus tree that grows 2 to 3 m tall and wide. It produces large, fragrant yellow fruit with thick peel and little pulp, used mainly for peel, candying and zest.
Published · By GardenBuddy.au
Planting dates, current conditions and prices on this page update daily.
Photo: Wikimedia Commons
Planting Calendar for Subtropical
- Jan -
- Feb -
- Mar ✓
- Apr ✓
- May ✓
- Jun -
- Jul -
- Aug -
- Sep ✓
- Oct ✓
- Nov -
- Dec -
S = Seed Tray T = Transplant D = Direct Sow
Want a nudge when it is sowing time?
One email a week with what is worth planting in the Subtropical zone right now, Citron included, plus which veg has jumped in price at the supermarket. Free, and you can stop it in one click.
How to Grow Citron in Subtropical Australia
- Soil
- Deep, well-draining sandy loam or rich loamy soil
- Salt
- Sensitive. Struggles with salty bore water or salty soil. Give it rainwater if you can.
- pH Range
- 6.0-7.5
- Sunlight
- Full sun, at least 6 to 8 hours of direct sun a day
- Spacing
- 300-400cm apart, 400cm between rows
- Watering
- Water deeply every two to three weeks once established, more in hot dry weather; mulch 10cm deep away from the trunk
- Good companions
- Nasturtium, Chives, Garlic, Comfrey, Lemongrass
Subtropical Growing Tips for Citron
Recommended Varieties
- Buddha's Hand: Fascinating ornamental variety producing fragrant, finger-like yellow fruit rind used for candied peel and zest
Key Challenges
- Citrus Leafminer: Cosmetic mainly
- Queensland Fruit Fly: Destroys ripe fruit
- Spined Citrus Bug: Native green shield bug with distinctive shoulder spines
- Bronze orange bug: Sap sucking causes shoot dieback and fruit drop
Pro Tips
- Apply balanced organic citrus fertiliser three times a year in early spring, summer, and early autumn, supplementing with zinc, iron, and trace elements
- Apply a 5 to 10 cm layer of organic mulch around the dripline, keeping it 10 cm away from the trunk to prevent collar rot
- Stake young trees loosely using flexible ties to protect the main graft union and stem against strong winds
Pests and problems for Citron in Subtropical
- Root Rot in Poorly Drained Soil Plant in well-drained soil in full sun and avoid waterlogging. Mound soil and keep mulch off the trunk. Watch
- Queensland Fruit Fly Queensland Fruit Fly: Destroys ripe fruit Watch
- Spined Citrus Bug Spined Citrus Bug: Native green shield bug with distinctive shoulder spines Watch
- Bronze orange bug Bronze orange bug: Sap sucking causes shoot dieback and fruit drop Watch
Harvesting Citron
When ready: Thick, bumpy rind turns fully bright yellow or yellow-green and gives off a strong citrus fragrance
How to harvest: Clip fruit stem cleanly close to the rind using sharp secateurs to avoid tearing skin
What members get
- Soil and weather from your nearest station
- An email when it's time to sow
- Your own garden plan, including planning from a photo
- Price history and price alerts
- Pest risk alerts for your area
- Full salt and canning detail
Common Questions About Citron
When do you plant citron in Australia?
It depends on your climate zone, not the calendar month alone. Planting months by zone:
- Tropical (Cairns): Mar to May, Sep to Oct
- Subtropical (Brisbane): Mar to May, Sep to Oct
- Warm Temperate (Sydney): Mar to Apr, Sep to Oct
- Cool Temperate (Melbourne): Sep to Nov
- Cold / Highland (Canberra): not recommended
- Arid / Semi-Arid (Alice Springs): Mar to Apr, Sep
- Mediterranean (Perth): Mar to Apr, Sep to Oct
Can you grow citron all year round in Brisbane?
No. In the Subtropical zone the planting months are Mar to May, Sep to Oct. Outside that window it either bolts, sulks or gets cut down by the weather.
When should I plant Citron in Brisbane?
Plant year-round in well-drained, fertile soil in a full sun position protected from heavy frost and strong winds.
How do I know when Citron are ready to harvest?
Thick, bumpy rind turns fully bright yellow or yellow-green and gives off a strong citrus fragrance
What are the best Citron varieties for Brisbane?
Recommended varieties for the Subtropical zone include: Buddha's Hand: Fascinating ornamental variety producing fragrant, finger-like yellow fruit rind used for candied peel and zest.
What grows well with Citron?
Good companion plants for Citron include: Nasturtium, Chives, Garlic, Comfrey, Lemongrass.
Are citron salt tolerant?
No. Citron 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 Subtropical zone, Brisbane is its reference city.