When to plant sweet corn in Fontana
Sweet corn is frost-tender, so every date keys off Fontana'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
May 20 – Jun 29
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 Fontana?
Direct-sow around late March (Mar 21–Apr 11) in Fontana, based on its local frost dates. Confidence 75%.
When will sweet corn be ready to harvest in Fontana?
Expect to harvest from around mid May (May 20–Jun 29) in Fontana, based on its local frost dates. Confidence 69%.
How long is the growing season in Fontana?
Fontana 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 Fontana's frost dates.
Confidence 77/100 · Curated · based on NOAA GHCN-Daily 1991–2020 normal · frost dates are probabilities, not guarantees.