When to plant melon (cantaloupe/watermelon) in Hartford

Melon (cantaloupe/watermelon) is frost-tender, so every date keys off Hartford's last spring frost of Apr 14.
Step 1 · Sow
Start seeds indoors
Apr 18 – May 9
Before your last frost, on a warm windowsill or heat mat.
Step 2 · Plant
Transplant outdoors
Jun 21 – Jul 12
Once frost risk has passed and nights stay mild.
Step 3 · Harvest
Harvest window
Sep 4 – Sep 29
Picking runs until conditions turn against the crop.
Window
Days to maturity
75 – 100 d
Hartford's 188-day season leaves this much room.
Melon (cantaloupe/watermelon) on Hartford'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
APR 14
OCT 19

Common questions

When can I sow melon (cantaloupe/watermelon) outdoors in Hartford?

Direct-sow around late June (Jun 21–Jul 12) in Hartford, based on its local frost dates. Confidence 86%.

When will melon (cantaloupe/watermelon) be ready to harvest in Hartford?

Expect to harvest from around early September (Sep 4–Sep 29) in Hartford, based on its local frost dates. Confidence 80%.

When should I start melon (cantaloupe/watermelon) seeds indoors in Hartford?

Start seeds indoors around mid April (Apr 18–May 9) in Hartford, based on its local frost dates. Confidence 85%.

When can I transplant melon (cantaloupe/watermelon) outdoors in Hartford?

Transplant outdoors around late June (Jun 21–Jul 12) in Hartford, based on its local frost dates. Confidence 86%.

How long is the growing season in Hartford?

Hartford has roughly 188 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 Hartford's frost dates.

Confidence 89/100 · Curated · based on NOAA GHCN-Daily 1991–2020 normal · frost dates are probabilities, not guarantees.