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When to plant melon (cantaloupe/watermelon) in San Antonio

Melon (cantaloupe/watermelon) is frost-tender, so every date keys off San Antonio's last spring frost of Feb 21.
Step 1 · Sow
Start seeds indoors
Feb 13 – Mar 6
Before your last frost, on a warm windowsill or heat mat.
Step 2 · Plant
Transplant outdoors
Apr 12 – May 3
Once frost risk has passed and nights stay mild.
Step 3 · Harvest
Harvest window
Jun 26 – Jul 21
Picking runs until conditions turn against the crop.
Window
Days to maturity
75 – 100 d
San Antonio's 282-day season leaves this much room.
Melon (cantaloupe/watermelon) on San Antonio'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
FEB 21
NOV 29

Common questions

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

Direct-sow around mid April (Apr 12–May 3) in San Antonio, based on its local frost dates. Confidence 81%.

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

Expect to harvest from around late June (Jun 26–Jul 21) in San Antonio, based on its local frost dates. Confidence 75%.

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

Start seeds indoors around mid February (Feb 13–Mar 6) in San Antonio, based on its local frost dates. Confidence 79%.

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

Transplant outdoors around mid April (Apr 12–May 3) in San Antonio, based on its local frost dates. Confidence 81%.

How long is the growing season in San Antonio?

San Antonio has roughly 282 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 San Antonio's frost dates.

Confidence 83/100 · Curated · based on NOAA GHCN-Daily 1991–2020 normal · frost dates are probabilities, not guarantees.
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