When to plant melon (cantaloupe/watermelon) in St. Petersburg
Melon (cantaloupe/watermelon) is frost-tender, so every date keys off St. Petersburg's last spring frost.
Step 1 · Sow
Direct sow outdoors
Mar 21 – Apr 11
Sow straight into warm, workable soil.
Step 2 · Harvest
Harvest window
Jun 4 – Jun 29
Picking runs until conditions turn against the crop.
Window
Days to maturity
75 – 100 d
From sowing to first pick.
Common questions
When can I sow melon (cantaloupe/watermelon) outdoors in St. Petersburg?
Direct-sow around late March (Mar 21–Apr 11) in St. Petersburg, based on its local frost dates. Confidence 77%.
When will melon (cantaloupe/watermelon) be ready to harvest in St. Petersburg?
Expect to harvest from around early June (Jun 4–Jun 29) in St. Petersburg, based on its local frost dates. Confidence 71%.
How long is the growing season in St. Petersburg?
St. Petersburg has roughly 365 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 St. Petersburg's frost dates.
Confidence 79/100 · Curated · based on NOAA GHCN-Daily 1991–2020 normal · frost dates are probabilities, not guarantees.