Louisiana · zones 8b–9b
When to plant sweet potatoes in Louisiana.
Sow or transplant between Apr 6 to May 21 in a typical year, keyed to Louisiana's median last frost around Feb 28. Dates below are state medians; your ZIP code shifts them by days to weeks.
The 2026 windows
Sweet Potatoes dates for a typical Louisiana season.
1 · Start indoors
Feb 23 to Apr 9
About 6 weeks before set-out. Warm spot, real light.
2 · Set out
Apr 6 to May 21
Keyed to the ~Feb 28 last frost. Sow 3" deep, 14" apart.
Harvest
~110 days later
~2.5 lb per plant over ~1 weeks.
Louisiana spans more than one climate: Zone 9 is the most common zone, but the state runs 8b to 9b. 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.
In Louisiana: watch for
The pests that find sweet potatoes here.
With about 276 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: Louisiana gives sweet potatoes about 276 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 Louisiana: questions
When should I plant sweet potatoes in Louisiana?+
In a typical Louisiana year, sow sweet potatoes or set out transplants between Apr 6 to May 21, keyed to the state's median last frost around Feb 28. Your exact dates shift with your ZIP code and microclimate.
When do I start sweet potatoes seeds indoors in Louisiana?+
Start seeds inside about 6 weeks before set-out: roughly Feb 23 to Apr 9 for a typical Louisiana season.
What USDA zone is Louisiana?+
Louisiana spans zones 8b–9b, 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.