When to Plant Caper in Perth, Mediterranean Guide
Soil temperature is modelled from Open-Meteo forecast (Perth), not a live sensor.
What this month normally looks like in Mediterranean
In October the Mediterranean zone normally runs 22°C by day and 10°C overnight, with about 38 mm of rain over 6 or 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, 19 postcodes, SILO.
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This Caper 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.
- Planting window
- Aug to Dec
- 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 Mediterranean
- Jan -
- Feb -
- Mar -
- Apr -
- May -
- Jun -
- Jul -
- Aug S
- Sep S
- Oct S/T
- Nov S/T
- Dec T
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 Mediterranean zone right now, Caper included, plus which veg has jumped in price at the supermarket. Free, and you can stop it in one click.
How to Grow Caper in Mediterranean 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
Mediterranean Growing Tips for Caper
Recommended Varieties
- Inermis: Popular thornless or semi-thornless variety producing high yields of quality flower buds
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 Mediterranean
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 Perth?
No. In the Mediterranean zone the planting months are Aug to Dec. Outside that window it either bolts, sulks or gets cut down by the weather.
When should I plant Caper in Perth?
Plant direct in spring in a hot, sunny, sharply drained spot or dry embankment.
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 are the best Caper varieties for Perth?
Recommended varieties for the Mediterranean zone include: Inermis: Popular thornless or semi-thornless variety producing high yields of quality flower buds.
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 Mediterranean zone, Perth is its reference city.