When to plant summer squash / zucchini in Vancouver

Summer squash / Zucchini is frost-tender, so every date keys off Vancouver's last spring frost of Feb 27.
Step 1 · Sow
Start seeds indoors
Feb 27 – Mar 20
Before your last frost, on a warm windowsill or heat mat.
Step 2 · Plant
Transplant outdoors
Jun 23 – Jul 14
Once frost risk has passed and nights stay mild.
Step 3 · Harvest
Harvest window
Aug 7 – Aug 22
Picking runs until conditions turn against the crop.
Window
Days to maturity
45 – 60 d
Vancouver's 274-day season leaves this much room.
Summer squash / Zucchini on Vancouver'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
FEB 27
NOV 25

Common questions

When can I sow summer squash / zucchini outdoors in Vancouver?

Direct-sow around late June (Jun 23–Jul 14) in Vancouver, based on its local frost dates. Confidence 85%.

When will summer squash / zucchini be ready to harvest in Vancouver?

Expect to harvest from around early August (Aug 7–Aug 22) in Vancouver, based on its local frost dates. Confidence 79%.

When should I start summer squash / zucchini seeds indoors in Vancouver?

Start seeds indoors around late February (Feb 27–Mar 20) in Vancouver, based on its local frost dates. Confidence 84%.

When can I transplant summer squash / zucchini outdoors in Vancouver?

Transplant outdoors around late June (Jun 23–Jul 14) in Vancouver, based on its local frost dates. Confidence 85%.

How long is the growing season in Vancouver?

Vancouver has roughly 274 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 Vancouver's frost dates.

Confidence 88/100 · Curated · based on NOAA GHCN-Daily 1991–2020 normal · frost dates are probabilities, not guarantees.