Florida · zones 8b–11a
When to plant sweet corn in Florida.
Sow between Feb 10 to May 12 in a typical year, keyed to Florida's median last frost around Feb 3. Dates below are state medians; your ZIP code shifts them by days to weeks.
The 2026 windows
Sweet Corn dates for a typical Florida season.
Direct sow
Feb 10 to May 12
Keyed to the ~Feb 3 last frost. Sow 1.5" deep, 12" apart.
Harvest
~75 days later
~1 lb per plant over ~1 weeks.
Florida spans more than one climate: Zone 9 is the most common zone, but the state runs 8b to 11a. That's why the planner works from your ZIP code's frost dates, not your zone: mountain and coastal gardens in the same state can be three weeks apart.
Florida growing notes
A Florida sweet corn crop has to finish before the two heat gates close.
One window, chosen for margin rather than necessity
Florida's spring corn planting favors margin over necessity: central Florida gardens can put a round in during August, and south Florida grows corn through most of the cool season into March, so a single spring window is a choice rather than the only option the calendar allows. Sowing early enough that silking lands well ahead of the afternoons that regularly clear 95 degrees, the point where pollen viability starts to drop, is what that choice buys.
That single window still holds room for repeated sowings, since Florida's cool season runs long enough to fit far more successive plantings than a corn grower further north ever gets in one spring stretch. Stack short sowings a couple of weeks apart rather than banking everything on one date, and keep the goal the same throughout: the safest silking date against that 95 degree pollen threshold, not the widest possible spread of plantings.
Pollen fails before the plant looks stressed
Corn pollination suffers once temperatures climb above 95 degrees during silking, and a late-planted round that tassels as Florida's spring heat is already building can lose a real share of its pollen viability before a gardener notices anything wrong with the plants themselves; the stalks and leaves often still look perfectly healthy while the ears underneath fill in poorly. Planting the earliest rounds as soon as the season here allows gives silking the best shot at landing before that 95 degree threshold becomes a regular afternoon occurrence.
A block at least four rows wide, not one or two long rows, remains the baseline fix for wind pollination regardless of temperature, since a wider block traps more of whatever pollen a hot afternoon does manage to shed instead of scattering it before any of it lands.
One dose of oil beats a repeat spray
The adult moth lays her eggs right on fresh silk, and the larva that hatches works its way down into the ear tip long before any sign of trouble shows on the husk from outside. One application of mineral oil, placed onto each ear's silk somewhere between three and seven days after that silk first shows, once it has visibly browned and gone limp, smothers both eggs and the smallest larvae without touching the kernels developing underneath, and five to eight days after that silk first appears is generally the sweet spot.
Reach for the oil too early, while silk is still pale and turgid, and it seals off pollen before it can reach the kernels, leaving a bare, hollow tip even on an ear the earworm would never have found anyway. Treat each ear exactly once; going back for a second application wastes the oil and repeats that same pollen-blocking risk.
In Florida: watch for
The pests that find sweet corn here.
With about 315 frost-free days, sweet corn spends longer in the ground here than in most of the country, which widens the window in which corn earworm can find it. Scout weekly from midseason and act on the first signs.
Caterpillars feeding down in the tip of the ear.
Organic fix: A few drops of oil on the silk; Bt on the silks.
Broken tassels and frass-filled holes in the stalk.
Organic fix: Bt on young plants; cut and destroy stalks after harvest.
Clusters on the tassels and upper leaves.
Organic fix: Usually minor; insecticidal soap if heavy.
Fall armyworm
Ragged holes through the unfurling whorl leaves, with sawdust-like droppings down in the funnel.
Organic fix: Check whorls weekly before tassel; Bt or spinosad while the caterpillars are still small.
Cinnamon-brown powdery pustules breaking out on BOTH sides of the same leaf, lower leaves first, darkening as they age.
Organic fix: Water at the ground rather than overhead, and choose resistant varieties next season; sprays are rarely worth it.
Your season math: Florida gives sweet corn about 315 frost-free days, and it needs roughly 75 days to a first harvest. That fits about 25 re-sown rounds across the season, so you can keep it coming instead of picking once.
Planting sweet corn in Florida: questions
When should I plant sweet corn in Florida?+
In a typical Florida year, sow sweet corn between Feb 10 to May 12, keyed to the state's median last frost around Feb 3. Your exact dates shift with your ZIP code and microclimate.
What USDA zone is Florida?+
Florida spans zones 8b–11a, mostly zone 9. But frost dates, not zones, set planting time. The free planner uses your ZIP code's actual frost dates.
How many sweet corn plants do I need?+
Depends who you're feeding. The crop page has exact counts per household size, or the free planner does the math for your family in about 60 seconds.