When to plant cucumber in Grand Rapids
Cucumber is frost-tender, so every date keys off Grand Rapids's last spring frost of Apr 30.
Step 1 · Sow
Start seeds indoors
Apr 25 – May 16
Before your last frost, on a warm windowsill or heat mat.
Step 2 · Plant
Transplant outdoors
Jun 2 – Jun 23
Once frost risk has passed and nights stay mild.
Step 3 · Harvest
Harvest window
Jul 22 – Aug 11
Picking runs until conditions turn against the crop.
Window
Days to maturity
50 – 70 d
Grand Rapids's 166-day season leaves this much room.
Cucumber on Grand Rapids'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
FROST
APR 30
OCT 16
Common questions
When can I sow cucumber outdoors in Grand Rapids?
Direct-sow around early June (Jun 2–Jun 23) in Grand Rapids, based on its local frost dates. Confidence 84%.
When will cucumber be ready to harvest in Grand Rapids?
Expect to harvest from around late July (Jul 22–Aug 11) in Grand Rapids, based on its local frost dates. Confidence 78%.
When should I start cucumber seeds indoors in Grand Rapids?
Start seeds indoors around late April (Apr 25–May 16) in Grand Rapids, based on its local frost dates. Confidence 83%.
When can I transplant cucumber outdoors in Grand Rapids?
Transplant outdoors around early June (Jun 2–Jun 23) in Grand Rapids, based on its local frost dates. Confidence 84%.
How long is the growing season in Grand Rapids?
Grand Rapids has roughly 166 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 Grand Rapids's frost dates.
Confidence 87/100 · Curated · based on NOAA GHCN-Daily 1991–2020 normal · frost dates are probabilities, not guarantees.