AgriAuditor

Regional growing guide · Nebraska

Growing sweet potatoes in Nebraska

Sweet potatoes can be planted in Nebraska once frost danger has passed and soil reaches at least 65°F. UNL Extension recommends short-season varieties and raised ridges for the state’s growing conditions.

Nebraska soil-temperature gate

Growing for a home garden? See the general sweet potato guide.

Sweet potato field rows prepared for planting

Regional crop context

Sweet potatoes in Nebraska

UNL Extension’s Nebraska guide ties planting to a measured 65°F soil threshold and describes 100–110-day varieties for the local frost calendar.

The UNL source is a Lancaster County home-garden guide. It supplies a local temperature gate and variety-duration reference.

Step 1 of 7 · Assess

Check the field and production system before ordering slips

Coordinate clean slip supply, field preparation, planting water, setter capacity, weed control and digging space before committing acreage.

6 topics still to verify· planning aid only, not a suitability score

Local crop-planning checks

Walk low spots after rain. Confirm the bedder can make stable rows and that water can leave the field.

Not reviewed

Check previous sweet potato, grass or pasture history, nematode results, wireworm pressure and known disease patches.

Not reviewed

Confirm variety, slip quantity, delivery date, setter capacity, water at planting and a plan for keeping slips shaded before setting.

Not reviewed

Match variety and expected root size to the buyer’s fresh-market or processing specification, delivery timing and grading equipment.

Not reviewed

Confirm curing-room volume, airflow, pallet-bin handling and storage space before planting the acreage.

Not reviewed

Map the crop sequence and equipment-cleaning route so infested soil and plant material do not move between fields.

Not reviewed

Selections stay in this browser tab and are not saved or sent anywhere.

Need a field-specific review? Run a coordinate-level farm audit for localized conditions.

Read the field history before selecting slips

Root-knot nematodes, wireworms and other soilborne pests affect marketable roots. Soil sampling, clean planting material, crop rotation and equipment sanitation are the first decisions; chemical treatment depends on current field results and product labels.

Step 2 of 7 · Plan

Choose a transplant window in Nebraska

Use the Nebraska soil-temperature gate rather than a fixed statewide date: the field must be frost-safe, soil at least 65°F and enough season left for the selected variety.

Early planting

Soil reaches 65°F

The first workable date follows frost danger and a soil reading of at least 65°F at planting depth.

Main planting

100–110-day variety

The central option is a short-season variety planted with enough warm days to reach the target size.

Late planting

Before fall frost cutoff

Plant only while the remaining frost-free season matches the variety’s maturity requirement.

Early plantingMain plantingLate planting

Historical regional climate

Monthly soil and air temperature context

1996-01-01 to 2025-12-31

Green tiles are months whose mean soil temperature is in the 77–86°F root-development range; all other tiles are neutral and show the value. Early, main and late badges mark the 10th, median and 90th-percentile dates for reaching 18.3°C for 4 consecutive days. Bar height shows the mean.

Early soil-warming date

May 09

10th percentile

Median soil-warming date

May 25

median year

Late soil-warming date

June 05

90th percentile

  • Early · 10th percentile
  • Main · median
  • Late · 90th percentile
  • 77–86°F root range
  • Cooler or warmer than the root range

June: regional monthly means

Modeled soil temperature
21.9°C · 0–7 cm model layer
Mean air temperature
21.7°C

Months whose historical mean soil temperature reaches the 65°F reference: June, July, August, September. Months in the 77–86°F root-development range: July, August. These are monthly regional averages, not planting dates or a frost check.

Open-Meteo · era5_land · 1996-01-01 to 2025-12-31 · Reference point 41.50°N, 99.50°W. Soil-temperature values are modeled at 0–7 cm model layer; the 65°F (18.3°C) transplant reference comes from a 4-inch field measurement. Use the regional calendar above with a current field reading.

Set the field date from a real soil reading

Sweet potato slips establish best after frost risk has passed and the soil is at least 65°F (18.3°C) at 4 inches. That is a field measurement; the climate strip above shows regional history.

Match the date to variety maturity

Use the regional crop duration and expected fall cutoff to choose a variety and harvest date. Confirm market grade, digging capacity and curing space before planting.

Step 3 of 7 · Prepare

Build an aerated bed and keep the crop sequence clean

Sweet potatoes develop best in a loose, well-drained root zone. Shape beds to the field soil and drainage pattern, and keep saturated ground out of the planting plan.

The bed does several jobs

  • Improves aeration and drainage around developing roots.
  • Warms the crop zone for a warm-season transplant.
  • Gives the setter and digger a consistent row to follow.

Keep bed height and shape consistent with soil texture, water movement and the equipment used on the farm.

Cross-section of a crowned sweet potato bed with arrows showing surface runoff moving down the shoulders.
A crowned, loose bed gives developing roots an aerated zone and can shed surface water down its shoulders. Shape the row for field soil, drainage and equipment; schematic, not to scale.

Set fertility from the field test

Base pH and fertilizer rates on representative soil tests. Avoid excess nitrogen, which can favor vine growth over marketable storage-root sizing.

Step 4 of 7 · Establish

Plant slips, not seed, and calculate the stand

Sweet potatoes are established from vegetative vine cuttings called slips. Buy clean, healthy slips in the target variety and quantity, and keep them shaded and moist until planting.

Sweet potato slip set diagonally with its shoot and leaves above the soil, at least three buried nodes, new roots and a 3–4 inch depth mark.
Set the slip so at least three nodes sit below the soil while the growing tip and leaves remain above. The 3–4 inch (7.6–10.2 cm) depth is a practical guide; node position is the key. Leaf shape varies by cultivar. Water after transplanting.

Regional starting pattern

Between rows
36–48 in (91–122 cm)
Within row
8–14 in (20–36 cm)
Transplant depth
3–4 in (7.6–10.2 cm), with at least three nodes covered

UNL recommends raised ridges for garden planting. The calculator uses a bounded U.S. field spacing reference and lets the grower plan slip count around equipment.

Planting calculator

Estimate slips for your field

Spacing-based count

Estimated slips

12,446

at 42 × 12 in

Estimate = field area ÷ row-by-slip spacing. Keep values within the published bounds, then match the starting pattern to equipment and target root grade. Headlands and replant allowance are not included.

Step 5 of 7 · Manage

Protect the establishment period and the root grade

The first weeks determine how evenly slips establish and how the crop competes. Protect the crop from early weed competition and scout for wireworms, flea beetles and root-knot nematodes. Use field history, clean planting material and equipment sanitation to reduce avoidable risk.

Get water onto the slip at planting

Water immediately after setting and maintain enough moisture for root establishment. Track rainfall and soil moisture; avoid keeping beds saturated.

Keep the field clean while the crop closes rows

Scout early and maintain a weed-free start through canopy closure. Choose current control methods for the farm’s production system.

Scout below the canopy as well

Wireworms, flea beetles and root-knot nematodes can downgrade roots. Keep field history and scouting records tied to each harvest lot.

Keep tools and planting stock clean

Use certified or otherwise clean slips, avoid carrying soil on slips, and clean equipment after infested fields to limit movement of nematodes and soilborne disease.

Step 6 of 7 · Harvest

Dig at the planned size, cure quickly and protect the skin

Select a 100–110-day variety and complete harvest before frost. Cure promptly after digging.

A tractor lifting sweet potatoes during field harvest
At harvest, protect the skin and move roots promptly to curing; equipment and handling systems vary by region.

Harvest period

About 100–110 days for the listed short-season varieties.

Plan by variety, market size, planting date, field condition and frost risk.

Cure

80–85°F · 85–90% RH

A crop-level curing reference is 7–10 days with airflow; use the facility and buyer protocol for the harvested lot.

Store

55–60°F · about 85% RH

Maintain stable temperature, humidity and ventilation after curing.

Step 7 of 7 · Reference

Evidence behind the Nebraska guide

View references (4)
  1. 1. Nebraska Extension — Sweet Potato: Grow Your Own for Next Year’s Holiday TablePublished 15 November 2020

    Lancaster County soil-temperature threshold, short-season varieties and raised-ridge practice; home-garden guide.

  2. 2. Washington State University Extension — Sweetpotato Production PracticesPublished January 2026

    Crop-level soil-temperature context, bed preparation, equipment-led row spacing and the relationship between plant density and root size.

  3. 3. University of Missouri Extension — Growing Sweet PotatoesReviewed March 2026; originally published September 2017

    Crop-level transplant establishment, slips, frost sensitivity and raised-bed practice. Missouri calendar dates are not applied to other regions.

  4. 4. Texas A&M AgriLife — Sweet Potato commercial crop profileOlder technical profile; undated PDF

    Shared crop-level reference for curing and storage conditions. Its Texas planting calendar is used only on the Texas page.

Photo authorship and licence information are recorded centrally. View photo credits.

Explore other regional guides (25)