When to plant cucumber in Adelaide
Cucumber is frost-tender, so every date keys off Adelaide's last spring frost of Aug 15.
Step 1 · Sow
Start seeds indoors
Jul 25 – Aug 15
Before your last frost, on a warm windowsill or heat mat.
Step 2 · Plant
Transplant outdoors
Aug 22 – Sep 12
Once frost risk has passed and nights stay mild.
Step 3 · Harvest
Harvest window
Oct 11 – Oct 31
Picking runs until conditions turn against the crop.
Window
Days to maturity
50 – 70 d
Adelaide's 304-day season leaves this much room.
Cucumber on Adelaide's growing year
Frost-bounded season with crops mapped onto the 12-month axis.
Frost risk Growing Harvest
JAN
FEB
MAR
APR
MAY
JUN
JUL
AUG
SEP
OCT
NOV
DEC
FROST
AUG 15
JUN 15
Common questions
When can I sow cucumber outdoors in Adelaide?
Direct-sow around late August (Aug 22–Sep 12) in Adelaide, based on its local frost dates. Confidence 80%.
When will cucumber be ready to harvest in Adelaide?
Expect to harvest from around mid October (Oct 11–Oct 31) in Adelaide, based on its local frost dates. Confidence 72%.
When should I start cucumber seeds indoors in Adelaide?
Start seeds indoors around late July (Jul 25–Aug 15) in Adelaide, based on its local frost dates. Confidence 76%.
When can I transplant cucumber outdoors in Adelaide?
Transplant outdoors around late August (Aug 22–Sep 12) in Adelaide, based on its local frost dates. Confidence 80%.
How long is the growing season in Adelaide?
Adelaide has roughly 304 frost-free days, which is enough time to grow cucumber to maturity outdoors.
The rule of thumb
Sow cucumber 6–8 weeks before your last spring frost; plant out 2–3 weeks after it. Every date on this page is derived from that rule and Adelaide's frost dates.
Confidence 80/100 · NOAA GHCN-Daily · 1991–2020 normals · frost dates are probabilities, not guarantees.