When to plant melon (cantaloupe/watermelon) in Detroit
Melon (cantaloupe/watermelon) is frost-tender, so every date keys off Detroit's last spring frost of Apr 15.
Step 1 · Sow
Start seeds indoors
Apr 8 – Apr 29
Before your last frost, on a warm windowsill or heat mat.
Step 2 · Plant
Transplant outdoors
Jun 20 – Jul 11
Once frost risk has passed and nights stay mild.
Step 3 · Harvest
Harvest window
Sep 3 – Sep 28
Picking runs until conditions turn against the crop.
Window
Days to maturity
75 – 100 d
Detroit's 194-day season leaves this much room.
Melon (cantaloupe/watermelon) on Detroit'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 15
OCT 31
Common questions
When can I sow melon (cantaloupe/watermelon) outdoors in Detroit?
Direct-sow around mid June (Jun 20–Jul 11) in Detroit, based on its local frost dates. Confidence 85%.
When will melon (cantaloupe/watermelon) be ready to harvest in Detroit?
Expect to harvest from around early September (Sep 3–Sep 28) in Detroit, based on its local frost dates. Confidence 79%.
When should I start melon (cantaloupe/watermelon) seeds indoors in Detroit?
Start seeds indoors around early April (Apr 8–Apr 29) in Detroit, based on its local frost dates. Confidence 84%.
When can I transplant melon (cantaloupe/watermelon) outdoors in Detroit?
Transplant outdoors around mid June (Jun 20–Jul 11) in Detroit, based on its local frost dates. Confidence 85%.
How long is the growing season in Detroit?
Detroit has roughly 194 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 Detroit's frost dates.
Confidence 88/100 · Curated · based on NOAA GHCN-Daily 1991–2020 normal · frost dates are probabilities, not guarantees.