When to plant melon (cantaloupe/watermelon) in Fukuoka
Melon (cantaloupe/watermelon) is frost-tender, so every date keys off Fukuoka's last spring frost of Mar 15.
Step 1 · Sow
Start seeds indoors
Feb 22 – Mar 15
Before your last frost, on a warm windowsill or heat mat.
Step 2 · Plant
Transplant outdoors
Mar 29 – Apr 19
Once frost risk has passed and nights stay mild.
Step 3 · Harvest
Harvest window
Jun 12 – Jul 7
Picking runs until conditions turn against the crop.
Window
Days to maturity
75 – 100 d
Fukuoka's 268-day season leaves this much room.
Melon (cantaloupe/watermelon) on Fukuoka'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
MAR 15
DEC 8
Common questions
When can I sow melon (cantaloupe/watermelon) outdoors in Fukuoka?
Direct-sow around late March (Mar 29–Apr 19) in Fukuoka, based on its local frost dates. Confidence 72%.
When will melon (cantaloupe/watermelon) be ready to harvest in Fukuoka?
Expect to harvest from around mid June (Jun 12–Jul 7) in Fukuoka, based on its local frost dates. Confidence 65%.
When should I start melon (cantaloupe/watermelon) seeds indoors in Fukuoka?
Start seeds indoors around late February (Feb 22–Mar 15) in Fukuoka, based on its local frost dates. Confidence 68%.
When can I transplant melon (cantaloupe/watermelon) outdoors in Fukuoka?
Transplant outdoors around late March (Mar 29–Apr 19) in Fukuoka, based on its local frost dates. Confidence 72%.
How long is the growing season in Fukuoka?
Fukuoka has roughly 268 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 Fukuoka's frost dates.
Confidence 72/100 · NASA POWER (modeled) · 1991–2020 · frost dates are probabilities, not guarantees.