When to plant cucumber in Wilmington
Cucumber is frost-tender, so every date keys off Wilmington's last spring frost of Apr 6.
Step 1 · Sow
Start seeds indoors
Mar 28 – Apr 18
Before your last frost, on a warm windowsill or heat mat.
Step 2 · Plant
Transplant outdoors
May 13 – Jun 3
Once frost risk has passed and nights stay mild.
Step 3 · Harvest
Harvest window
Jul 2 – Jul 22
Picking runs until conditions turn against the crop.
Window
Days to maturity
50 – 70 d
Wilmington's 214-day season leaves this much room.
Cucumber on Wilmington'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 6
NOV 8
Common questions
When can I sow cucumber outdoors in Wilmington?
Direct-sow around mid May (May 13–Jun 3) in Wilmington, based on its local frost dates. Confidence 86%.
When will cucumber be ready to harvest in Wilmington?
Expect to harvest from around early July (Jul 2–Jul 22) in Wilmington, based on its local frost dates. Confidence 80%.
When should I start cucumber seeds indoors in Wilmington?
Start seeds indoors around late March (Mar 28–Apr 18) in Wilmington, based on its local frost dates. Confidence 85%.
When can I transplant cucumber outdoors in Wilmington?
Transplant outdoors around mid May (May 13–Jun 3) in Wilmington, based on its local frost dates. Confidence 86%.
How long is the growing season in Wilmington?
Wilmington has roughly 214 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 Wilmington's frost dates.
Confidence 89/100 · Curated · based on NOAA GHCN-Daily 1991–2020 normal · frost dates are probabilities, not guarantees.