When to plant summer squash / zucchini in Sydney
Summer squash / Zucchini is frost-tender, so every date keys off Sydney's last spring frost of Jul 25.
Step 1 · Sow
Start seeds indoors
Jul 11 – Aug 1
Before your last frost, on a warm windowsill or heat mat.
Step 2 · Plant
Transplant outdoors
Aug 1 – Aug 22
Once frost risk has passed and nights stay mild.
Step 3 · Harvest
Harvest window
Sep 15 – Sep 30
Picking runs until conditions turn against the crop.
Window
Days to maturity
45 – 60 d
Sydney's 345-day season leaves this much room.
Summer squash / Zucchini on Sydney'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
JUL 25
JUL 5
Common questions
When can I sow summer squash / zucchini outdoors in Sydney?
Direct-sow around early August (Aug 1–Aug 22) in Sydney, based on its local frost dates. Confidence 84%.
When will summer squash / zucchini be ready to harvest in Sydney?
Expect to harvest from around mid September (Sep 15–Sep 30) in Sydney, based on its local frost dates. Confidence 76%.
When should I start summer squash / zucchini seeds indoors in Sydney?
Start seeds indoors around mid July (Jul 11–Aug 1) in Sydney, based on its local frost dates. Confidence 80%.
When can I transplant summer squash / zucchini outdoors in Sydney?
Transplant outdoors around early August (Aug 1–Aug 22) in Sydney, based on its local frost dates. Confidence 84%.
How long is the growing season in Sydney?
Sydney has roughly 345 frost-free days, which is enough time to grow summer squash / zucchini to maturity outdoors.
The rule of thumb
Sow summer squash / zucchini 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 Sydney's frost dates.
Confidence 84/100 · NOAA GHCN-Daily · 1991–2020 normals · frost dates are probabilities, not guarantees.