Florida · zones 8b–11a
When to plant sweet potatoes in Florida.
Sow or transplant between Mar 12 to Apr 26 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 Potatoes dates for a typical Florida season.
1 · Start indoors
Jan 29 to Mar 15
About 6 weeks before set-out. Warm spot, real light.
2 · Set out
Mar 12 to Apr 26
Keyed to the ~Feb 3 last frost. Sow 3" deep, 14" apart.
Harvest
~110 days later
~2.5 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
Florida's sand grows a clean sweet potato and a nematode problem in the same bed.
Sand shapes the root, but it feeds nothing on its own
Sweet potatoes push out sideways as they swell, and Florida's loose sandy soil, especially through the central and coastal regions, lets that happen with almost no resistance, producing the smooth, evenly shaped roots that a heavier clay bed further north often cannot. That same sand holds almost no nutrients on its own, though, draining both rainfall and fertilizer through the root zone quickly, so a bed that looks well fed at planting time can run short by the time roots are actually sizing up months later.
Avoid heavy nitrogen regardless of how thin the sand seems, since sweet potatoes fed too rich grow enormous vines and small, disappointing roots underneath; a light, steady feeding through the season works better here than one heavy application up front. Hill the bed slightly even in loose sand, since a little extra rooting depth still helps roots size up evenly rather than crowding sideways against each other.
Root-knot nematode is the trade for that loose sand
The same sandy texture that shapes a clean sweet potato root also gives root-knot nematode the loose ground it needs to move through soil and reproduce, and sweet potatoes are a strong host for it. An infected root develops small rough cracks and galls on the skin that ruin table quality even when the vines above ground look completely healthy through the whole season, which makes this one of the harder Florida garden problems to catch before harvest.
Rotate the bed away from any spot that grew sweet potatoes, tomatoes, or peppers within the last two years, since all three host similar nematode species and let a population build rather than break between plantings. Beauregard performs reliably across Florida's sandy soils and is worth pairing with a county extension nematode test if a previous planting came out of the ground scarred or cracked.
Set slips into soil that has already warmed
Slips set into soil that has not yet reached a steady 65 degrees do not die, they simply stall, sitting without meaningful growth for weeks that never show up in the final harvest weight; there is no seed-style germination gate here to watch for, since a slip is already a rooted cutting rather than a seed waiting to sprout. Florida's mild winter and early frost-free start can tempt a gardener into planting slips too soon, especially in the northern part of the state where a cool snap can still linger well into what feels like spring planting weather.
Check the soil with a simple thermometer at the same hour every morning across a run of days instead of trusting one mild afternoon reading, which can run warm enough to mislead without reflecting where the ground has actually settled. Waiting the extra week or two for that steady reading costs far less than the stalled growth of slips planted too early into cool sand.
In Florida: watch for
The pests that find sweet potatoes here.
With about 315 frost-free days, sweet potato spends longer in the ground here than in most of the country, which widens the window in which sweetpotato weevil can find it. Scout weekly from midseason and act on the first signs.
Sweetpotato weevil
Narrow tunnels through roots, and a bitter taste that survives cooking.
Organic fix: Plant certified slips, rotate the bed, and destroy any vine with a wilting runner.
Wireworms & white grubs
Shallow holes and grooves chewed into the roots, found only at digging time.
Organic fix: Avoid planting into ground that was in sod last year; rotate away from grassy beds.
Clusters on the tender growing tips of new vines.
Organic fix: Hose them off in the morning, or use insecticidal soap.
Black rot
Dry, firm dark patches on the roots, usually found at harvest or in storage, with a sweet fruity smell.
Organic fix: Start from clean slips cut well above the soil line, never save roots from a bad crop, and rotate 3 years.
Your season math: Florida gives sweet potatoes about 315 frost-free days, and it needs roughly 110 days to a first harvest. It's a one-planting crop, so time that single sowing well.
Planting sweet potatoes in Florida: questions
When should I plant sweet potatoes in Florida?+
In a typical Florida year, sow sweet potatoes or set out transplants between Mar 12 to Apr 26, keyed to the state's median last frost around Feb 3. Your exact dates shift with your ZIP code and microclimate.
When do I start sweet potatoes seeds indoors in Florida?+
Start seeds inside about 6 weeks before set-out: roughly Jan 29 to Mar 15 for a typical Florida season.
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 potatoes 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.