When to Plant Caper in Cairns, Tropical Guide
Soil temperature is modelled from Open-Meteo forecast (Cairns), not a live sensor.
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 Caper 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
- Sep to Nov
- Days to harvest
- about 156 weeks
- Sun
- Full sun
- Water
- Low
- Spacing
- 150 cm apart
- Soil pH
- 6.5–8.5
Capparis spinosa. Deciduous shrub for cured flower buds and berries. Suits sunny, dry conditions; coastal humidity is a major limitation.
Published · By GardenBuddy.au
Planting dates, current conditions and prices on this page update daily.
Photo: Wikimedia Commons
Planting Calendar for Tropical
- 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?
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How to Grow Caper in Tropical Australia
- Soil
- Lean, rocky, sandy, or gravelly free-draining soil
- Salt
- Moderately sensitive. Copes with a little salt, but the harvest drops on salty bore water.
- pH Range
- 6.5-8.5
- Sunlight
- Full sun, at least 6 to 8 hours of direct sun a day
- Spacing
- 150cm apart, 200cm between rows
- Watering
- Water regularly through the first two summers after planting. Once established it is drought tolerant, so water only when the soil is dry about 10 cm down.
- Good companions
- Thyme, Lavender, Rosemary, Sage, Oregano
Tropical Growing Tips for Caper
Key Challenges
- Crown and root rot: Plants collapse, usually in wet soil
- Aphids: Sap-sucking, virus transmission
- Leaf Spot: Spoils the leaves and weakens the plant
- Mealybugs and scale: Sap loss, weak growth and sticky honeydew
Pro Tips
- Requires little fertiliser; apply a light top-dressing of organic compost or low-nitrogen slow-release fertiliser in early spring
- Mulch with gravel or coarse crushed rock around the base to keep root crowns dry and prevent rot
- Prune hard back to near ground level during winter dormancy to encourage vigorous new fruiting wood in spring
Pests and problems for Caper in Tropical
Harvesting Caper
When ready: Pick tight, firm green flower buds in early morning before they open into blossoms
How to harvest: Hand-pick individual buds carefully using fingers or small snips
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 Caper
When do you plant caper in Australia?
It depends on your climate zone, not the calendar month alone. Planting months by zone:
- Tropical (Cairns): Sep to Nov
- Subtropical (Brisbane): Sep to Nov
- Warm Temperate (Sydney): Aug to Dec
- Cool Temperate (Melbourne): Sep to Dec
- Cold / Highland (Canberra): not recommended
- Arid / Semi-Arid (Alice Springs): Aug to Dec
- Mediterranean (Perth): Aug to Dec
Can you grow caper all year round in Cairns?
No. In the Tropical zone the planting months are Sep to Nov. Outside that window it either bolts, sulks or gets cut down by the weather.
When should I plant Caper in Cairns?
Plant from September to November.
What soil temperature do Caper need?
Caper germinate best when soil temperature is between 20°C and 25°C.
How do I know when Caper are ready to harvest?
Pick tight, firm green flower buds in early morning before they open into blossoms
What grows well with Caper?
Good companion plants for Caper include: Thyme, Lavender, Rosemary, Sage, Oregano.
Are caper salt tolerant?
Only a little. Caper 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 Tropical zone, Cairns is its reference city.