AgriAuditor

Regional growing overview · Germany

Growing sweet potatoes in Germany

Sweet potatoes are grown in Germany, but a national climate average hides the warmer local pockets. Field trials and production are documented at specific locations in Bavaria, Lower Saxony, Mecklenburg-Western Pomerania and North Rhine-Westphalia.

Documented local production and trial pockets

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

Sweet potato field rows prepared for planting

Regional crop context

Sweet potatoes in Germany

BZL reports production on a few hundred hectares, with area not yet captured in official crop statistics. The crop is expanding from smaller direct-market and organic operations.

The national production figure is scale context. The linked pages use named trial or production locations and do not extend a site result to every field in its state.

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.

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

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

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

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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 Germany

Choose a documented local growing pocket below. Each guide shows the month supported by its regional production or field-trial source beside the 1996–2025 local climate record.

Niederbayern · Landau an der Isar

Repeated Bavarian trials and a practice-farm observation; the source reports successful cultivation in Niederbayern.

Planting reference: Late May · trial weeks 21/22

View local climate and growing guide

Rieste · Lower Saxony

A documented commercial producer and a successful Lower Saxony field-trial program.

Planting reference: After mid-May · national source window; local date not published

View local climate and growing guide

Gülzow-Prüzen · Mecklenburg-Western Pomerania

Repeated state field trials; marketable yield depended on treatment and pest pressure.

Planting reference: May · field planting recorded 16 May

View local climate and growing guide

Köln-Auweiler · North Rhine-Westphalia

A local exploratory trial produced marketable roots; evidence is one non-replicated test.

Planting reference: June · field planting recorded 10 June

View local climate and growing guide

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
80–100 cm (field reference)
Within row
20–30 cm
Transplant depth
3–4 in (7.6–10.2 cm), with at least three nodes covered

BZL gives 20–30 cm between slips. The row-spacing starting point follows published European field trials; the calculator bounds both dimensions for planning.

Planting calculator

Estimate slips for your field

Spacing-based count

Estimated slips

44,444

at 90 × 25 cm

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

Dig before sustained soil temperatures fall below 12°C to protect root quality. Handle skins carefully, then cure and store under controlled conditions.

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

90–120 days after transplant; before sustained soil temperatures fall below 12°C.

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

Cure

27–33°C · 80–95% RH

BZL describes a four-to-ten-day curing period after harvest.

Store

12–16°C

BZL gives six to twelve months under suitable storage conditions after curing.

Step 7 of 7 · Reference

Evidence behind the Germany guide

View references (9)
  1. 1. Federal Centre for Agriculture (BZL) — Werden in Deutschland auch Süßkartoffeln angebaut?Updated 5 November 2025

    German production scale, frost-safe planting after mid-May, crop duration, in-row spacing, harvest soil-temperature cutoff, curing and storage.

  2. 2. AELF Landshut / Bavarian State Horticultural Research Center — Bio-Süßkartoffelanbau in BayernRegional trials reported since 2016

    Niederbayern trial timing and successful practice-farm cultivation near Landau an der Isar.

  3. 3. Lower Saxony Chamber of Agriculture — Die Süßkartoffel – Eine neue Kultur für niedersächsische Felder?Three-year trial reported 2021

    Successful 2018–2020 state trials and sweet potato production on smaller farms in Lower Saxony.

  4. 4. Mecklenburg-Western Pomerania State Research Center — northern Germany sweet potato trial2019 trial report, published 2020

    Gülzow-Prüzen trial planted 16 May; treatment, yield and marketability results.

  5. 5. North Rhine-Westphalia organic horticulture trials — Versuche zum ökologischen Gartenbau in NRW 20162016 trial report

    Köln-Auweiler exploratory trial planted 10 June and harvested 6 October; the report identifies its non-replicated design.

  6. 6. Szarvas et al. — The effect of plant density on the yield of sweet potatoPublished 23 May 2019; three field seasons in southeast Hungary

    European field trial comparing 80 × 20, 80 × 30, 100 × 20 and 100 × 30 cm row-by-plant spacing. Used as a crop-level spacing reference, not a local calendar.

  7. 7. 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.

  8. 8. 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.

  9. 9. 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.

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