When to plant sweet corn in San Diego
Sweet corn is frost-tender, so every date keys off San Diego's last spring frost.
Step 1 · Sow
Direct sow outdoors
Mar 25 – Apr 15
Sow straight into warm, workable soil.
Step 2 · Harvest
Harvest window
May 24 – Jul 3
Picking runs until conditions turn against the crop.
Window
Days to maturity
60 – 100 d
From sowing to first pick.
Common questions
When can I sow sweet corn outdoors in San Diego?
Direct-sow around late March (Mar 25–Apr 15) in San Diego, based on its local frost dates. Confidence 81%.
When will sweet corn be ready to harvest in San Diego?
Expect to harvest from around late May (May 24–Jul 3) in San Diego, based on its local frost dates. Confidence 76%.
How long is the growing season in San Diego?
San Diego has roughly 365 frost-free days, which is enough time to grow sweet corn to maturity outdoors.
The rule of thumb
Sow sweet corn 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 Diego's frost dates.
Confidence 84/100 · Curated · based on NOAA GHCN-Daily 1991–2020 normal · frost dates are probabilities, not guarantees.