When to plant melon (cantaloupe/watermelon) in Nagoya
Melon (cantaloupe/watermelon) is frost-tender, so every date keys off Nagoya's last spring frost of Apr 1.
Step 1 · Sow
Start seeds indoors
Mar 19 – Apr 9
Before your last frost, on a warm windowsill or heat mat.
Step 2 · Plant
Transplant outdoors
Jun 18 – Jul 9
Once frost risk has passed and nights stay mild.
Step 3 · Harvest
Harvest window
Sep 1 – Sep 26
Picking runs until conditions turn against the crop.
Window
Days to maturity
75 – 100 d
Nagoya's 253-day season leaves this much room.
Melon (cantaloupe/watermelon) on Nagoya'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
APR 1
DEC 9
Common questions
When can I sow melon (cantaloupe/watermelon) outdoors in Nagoya?
Direct-sow around mid June (Jun 18–Jul 9) in Nagoya, based on its local frost dates. Confidence 44%.
When will melon (cantaloupe/watermelon) be ready to harvest in Nagoya?
Expect to harvest from around early September (Sep 1–Sep 26) in Nagoya, based on its local frost dates. Confidence 40%.
When should I start melon (cantaloupe/watermelon) seeds indoors in Nagoya?
Start seeds indoors around mid March (Mar 19–Apr 9) in Nagoya, based on its local frost dates. Confidence 43%.
When can I transplant melon (cantaloupe/watermelon) outdoors in Nagoya?
Transplant outdoors around mid June (Jun 18–Jul 9) in Nagoya, based on its local frost dates. Confidence 44%.
How long is the growing season in Nagoya?
Nagoya has roughly 253 frost-free days, which is enough time to grow melon (cantaloupe/watermelon) to maturity outdoors.
The rule of thumb
Sow melon (cantaloupe/watermelon) 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 Nagoya's frost dates.
Confidence 45/100 · Curated · based on NASA POWER (modeled) 1991–2020 · frost dates are probabilities, not guarantees.