Orange-fleshed, moist types such as Beauregard and Covington are the safest picks for Louisiana gardens. LSU’s AgCenter released Beauregard, and it remains a standard across the state’s sweet potato country. Frost hardly limits the choice, especially near the coast. Wet soil, root rot and the time roots sit in the ground matter far more. The sections below sort varieties by type and explain where each one breaks down.
The short answer for Louisiana
Make an orange-fleshed, moist type your main crop, and add a dry-fleshed or purple type only if you want something different on the table. Beauregard and Covington both fit that description, and both are widely sold as slips across the Gulf South. Choose them first, then experiment on a short row.
The reasoning starts with the calendar. NOAA’s 1991-2020 normals for New Orleans put the last spring 32F freeze in a window of January 18 to February 8, and the first fall freeze between December 17 and January 8. Those windows mark the dates when the chance of a freeze sits between 30 and 70 percent. A 32F freeze happens in only 86.8 percent of years at that station, so roughly one year in seven has no freeze at all. Frost is a minor concern for a crop that goes in the ground in spring and comes out in late summer or fall.
What shapes the choice is the weather in between. New Orleans averages 70.7 days a year at 90F or higher, and sweet potatoes handle that heat better than almost anything else in the vegetable garden. Rain is the bigger variable: about 21.3 inches fall across June, July and August (June 7.62, July 6.79, August 6.91), out of 63.4 inches for the year. Roots that sit in saturated soil through that stretch rot or crack, so the best variety is one that sizes up evenly and shrugs off wet feet.
Which sweet potato types suit Louisiana?
| Type | Examples | Fit for Louisiana | Watch for |
|---|---|---|---|
| Orange, moist flesh | Beauregard, Covington | Best all-round choice for heat, humidity and long seasons | Splitting when heavy rain follows a dry spell |
| Pale, dry flesh | Japanese-style types with purple skin | Good for a firmer, less sweet root; handles heat well | Needs well-drained soil; fewer local slip sources |
| Purple flesh | Okinawan-style types | Worth a small trial row | Slower, less uniform sizing in wet soil |
For planting dates by month, see When to Plant Sweet Potatoes in Louisiana. The table above should settle which slips to order.
What will not work here
Planting early on a warm February afternoon will not work. A freeze can still arrive in late winter, and cold soil holds a slip back from rooting. The calendar says the last freeze may fall as late as February 8 near New Orleans, and farther north it runs later. Sweet potatoes are a warm-soil crop, so wait until the ground has actually warmed.
Heavy clay with flat planting is the second failure. With 6.79 inches in July alone and 63.4 inches over the year, clay holds water for days. Roots in a flat bed sit wet, and they rot, crack or turn out misshapen. Sandy loam drains quickly after a storm, which is why so much of the state’s commercial acreage sits on lighter soil. On clay, build tall, wide ridges and add compost, or skip the crop and grow it in raised beds.
Close spacing also fails in this climate. Wet, hot weather makes vines grow fast, and a dense mat of leaves stays damp for hours after rain. Give each slip room, and don’t pour on nitrogen. Too much fertilizer produces vines at the expense of the roots.
Watering on a weekly schedule is a waste of effort in most summers, because rain does most of the work. A sandy bed in a dry spell between storms is the exception, and a rain gauge on your own plot settles it. Watch the soil, not the calendar.
Waiting for frost to tell you it is time to dig will not work either. About one year in seven has no freeze at all, and the first fall freeze can arrive as late as early January. Roots left in wet ground all that time may rot, and pests have more time to feed. Dig when the roots reach good size, and cure them in a warm, humid place before storing. Never store them in the refrigerator, because cold harms them.
What changes across Louisiana
Louisiana spans USDA hardiness zones 8a to 10a, based on the 2023 map built from 1991-2020 normals. Those zones are set by the average annual extreme minimum temperature, so the spread is wide: the northern parishes sit at the cool end, while the coastal parishes near the Gulf sit at the warm end. There is no single answer for the whole state. Check your own zone on the USDA Plant Hardiness Zone Map before relying on any statewide advice.
North Louisiana freezes far more reliably than the coast. That shifts the plan in two ways. Spring planting should wait until later, once the risk of a late freeze has passed, and the fall deadline comes sooner, so faster-maturing types are the safer pick. Roots left in the ground until a hard freeze get damaged, so harvest before the first one. Soils there also tend to include more upland clay, so ridges still matter.
South Louisiana has the opposite problem. The season is long enough for almost any type, but the rain and the standing water are harsher. Late-summer storms and tropical systems can soak a bed in a single week. Raised ridges, wide spacing and good drainage are not optional in the delta and along the coast. The same slips that thrive in a sandy field in the north can fail on a low, wet lot near the river.
For the full growing routine in either end of the state, see Growing Sweet Potatoes in Louisiana.
Where to check this for your own county
Louisiana divides into parishes rather than counties, and the LSU AgCenter has an extension office in each one. That is the place to confirm anything above. Search the site for sweet potato recommendations and look for two things: a local planting calendar and the variety trial results from your area.
Variety trials matter because they test named varieties side by side in real Louisiana soil, so they show which ones size evenly, resist rot and store well near you. Ask your parish office which slip sources are certified and whether any weevil quarantine rules apply to your area, since moving plant material can be restricted.
A parish recommendation beats a statewide one. Everything above is the statewide picture, built on one New Orleans station and a wide hardiness range. An extension agent knows your parish’s soil, the usual rainfall pattern and what local growers have planted. When the two disagree, follow the parish.
Checking this against your own garden
Your own observations outrank any date in print. Three are worth watching, and none needs equipment.
- Soil warmth by feel. Push your hand into the bed in the morning. If the soil feels cool against your palm, the slips will sit and stall. Warm soil means roots will form. A bed on a south-facing slope warms days before a shaded low spot.
- New leaves on the slips. After transplanting, fresh leaves show the slip has rooted. If the lower leaves yellow instead, the soil is probably too wet or too cold.
- How long the soil stays wet after rain. Squeeze a handful from a few inches down the day after a storm. If it stays in a sticky ball, the bed drains slowly and needs a taller ridge. If it crumbles, your bed drains well and may need watering during dry spells.
Keep notes on all three for a season. They tell you more about your own microclimate than any statewide average can.
Common questions
Is Beauregard the best sweet potato for Louisiana?
It is the most proven choice. LSU released it, and it grows well in the state’s heat and humidity. Covington is a strong alternative. Trial a few slips of a different type each year to see what suits your soil.
Can I grow sweet potatoes in clay soil?
Yes, with drainage work. Heavy clay holds water for days after rain, so plant on tall, wide ridges or in raised beds, and mix in compost. Keep spacing generous so the vines dry quickly.
Do I need to wait for frost before harvesting?
No. Some years never see a 32F freeze, and in the south the first fall freeze can come as late as early January. Dig when the roots are a good size, then cure them in a warm, humid place for storage.
Can I root slips from grocery-store sweet potatoes?
It is a gamble. Store roots may carry problems, and some are treated to slow sprouting. Certified slips from a reputable source are safer, especially in a state where weevils are a concern. Your parish extension office can point you to approved suppliers.