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Commercial field guide · Germany

Growing grain maize in Germany

Grain maize is grown across Germany’s maize belt. Sowing begins when the seedbed is warm and trafficable; maturity group and location determine whether grain reaches harvest condition.

This guide covers commercial grain maize; sweet corn and forage systems need different plans.

Corn plants growing in a field beneath an overcast sky

What changes for field corn in Germany?

Regional field guide

Germany’s central climate point is only a reference for the historical temperature display. Field decisions need the local spring soil and the hybrid maturity suited to the farm’s thermal season.

German Weather Service germination data, NRW maize stand guidance and German field trial observations. National soil and harvest conditions vary by region.

Crop system
Commercial grain maize
Region scale
Germany production guidance
Farm decision
Coordinate planting, seed placement and harvest

Step 1 of 7 · Assess

Check the production system and field before committing

Use this checklist to identify field, seed, water and market constraints before committing acreage.

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

Local crop-planning checks

Confirm grain specifications, delivery window, drying and storage costs before choosing the hybrid and harvest plan.

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Inspect soil moisture, drainage, compaction and residue across representative areas. Keep equipment off ground that smears or ruts.

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Choose a hybrid that can reach maturity within the expected season. Account for planting date, local heat-unit supply and harvest cutoff.

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Record the previous crop, residue and pest history. For irrigated fields, compare water capacity with crop demand; for rain-fed fields, track stored soil water.

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Sample representative management zones for pH and nutrients, then set fertilizer rates from the results and the crop goal.

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Check buyer specifications, combine capacity, drying, storage, transport and delivery timing before planting.

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Step 2 of 7 · Plan

Choose a Germany planting window

Regional planting calendar

Mid-April–early May · broad German field period

Germany
JanFebMarAprMayJunJulAugSepOctNovDec

Mid-April–early May · broad German field period

The broad field period is mid-April to early May. Let soil conditions set the start: the German Weather Service gives maize germination minimums of 8–10°C and notes that wet soil can rot seed and damage soil structure.

Before the planter enters

Check soil temperature in the seed zone, moisture and trafficability. Delay when water-saturated soil will rut, smear or compact; the calendar does not override a wet seedbed.

Historical seed-zone climate

Corn seedling-emergence temperature window

≥50°F · ≥10.0°C
Minimum soil-temperature trigger10°C (50°F)
Fastest emergence≈28.8°C (84°F)
Upper pre-emergence limit40°C (104°F)

The month band uses the regional minimum (50°F / 10.0°C) through 40°C. The optimum shown is for fastest seedling emergence, not whole-season crop growth. Climate period: 1996-01-01 to 2025-12-31; ERA5-Land soil-temperature estimates at 0–7 cm, summarized by complete year at the configured regional reference point.

The cited calendar and temperature-supported months overlap in May in at least half of the complete years. Early, Main and Late mark the temperature-supported months inside the published calendar bands; other months show climate context.

Early sowingMain sowingLate sowing
April: below minimum

Median monthly mean: 7.6°C (45.7°F) · 5/30 complete years in the thermal band · 0/30 years in the optimum band

Sources: University of Nebraska–Lincoln Extension — Soil temperature as a key factor in planting decisions · Beegum et al. — Corn seedling emergence and temperature in recent hybrids · Weaich, Bristow & Cass — High-temperature stress in preemergent maize · Open-Meteo Historical Weather API

Before planting, check field moisture, the short-range forecast, crop purpose and any insurance deadline.

Step 3 of 7 · Prepare

Prepare a fit seedbed and measure the root zone

Measure soil temperature at the cited seed-zone depth, then check soil moisture, drainage, residue and the forecast before planting.

A grower checking soil tilth in a corn seedbed
Check seedbed tilth before field traffic.

First check

A crumbly, workable seedbed

Check tilth before field traffic and keep heavy equipment off wet ground.

Seed placement reference

Keep seed placement uniform in the prepared seedbed, then verify actual depth and furrow closure after the planter enters the field.

Dig behind the planter to measure seed depth and check furrow closure across the field’s soil zones.

A grower opening a planted row to measure corn seed depth with a ruler
Expose the seed and measure from the soil surface.

Planting-depth reference

Planting depth by soil type

Field corn

These widely used corn seed-depth ranges bring Extension recommendations and field trials together by soil texture.

Fine-textured

Silty clay, clay loam, silty clay loam

1.5–2 in (3.81–5.08 cm)

Medium-textured

Silt loam, loam, gravelly loam

1.75–2 in (4.45–5.08 cm)

Coarse-textured

Sandy loam, sand, sandy lenses

1.75–2 in (4.45–5.08 cm)

Measure from the settled soil surface to the seed. Check the row after the first planter pass.

Cutaway schematic showing a corn kernel below the soil surface, with an emerging shoot, roots and a depth dimensionGeneral starting range: 1.5–2 in (3.81–5.08 cm)
Seed depth runs from the soil surface to the kernel. See the soil-type depth ranges above.

Check seed depth after planting

  1. Expose a short row section after the planter pass.
  2. Measure from the settled soil surface to the seed.
  3. Repeat where soil texture, residue or moisture changes.

Step 4 of 7 · Establish

Establish an even stand for the grain market

Regional commercial stand reference

Set the planter from the local stand target

Established stand

6–10 plants/m² (60,000–100,000 plants/ha), adjusted by hybrid group and water supply

Planter seed rate

About 6.3–11.1 seeds/m² (63,000–111,000 seeds/ha) at 90–95% field emergence

In-row spacing

About 12–21 cm seed-to-seed in 75 cm rows

Regional reference: North Rhine-Westphalia Chamber of Agriculture — Stand density and row spacing for maize

A planter meters individual kernels along a continuous row, not a cluster in a planting pit. Set seed count from the target established stand and the seed lot’s germination, then check the row after the first pass.

Close-up of maize kernels held above a prepared seedbed before sowing in the Germany production guide
Close-up of maize kernels before sowing.

At initial sowing

Use the intended field-corn hybrid and calibrate the planter for that seed lot. After the first pass, check seed spacing, depth and furrow closure, then adjust the planter as needed.

Calibrate

Set the planter by seeds per acre, then confirm singulation, seed spacing and downforce for the seed lot.

Check the row

Dig seed after the first pass and again when soil, residue or tillage changes.

Record the stand

Measure row spacing and a known row length, count live plants, then convert the count to plants per hectare. Repeat in at least six representative field areas.

Regional field focus: Select the maturity group from the farm’s heat-unit supply and harvest purpose. Set the target stand from soil water, variety type and yield level, then calibrate the planter to the seed lot.

Step 5 of 7 · Manage

Manage crop risks through the season

Regional risk to plan around

Cold, wet soil slows emergence; later sowing shortens the thermal season. Record emergence date and uniformity so replant decisions reflect plant population and crop stage.

Keep scouting evidence current

Use crop stage, field history and current local thresholds to guide scouting. Follow the product label for crop, use and application directions.

Walk rows and record what emerged

Check representative rows for gaps, doubles and uneven emergence. Compare plant counts with the planting record to locate stand issues.

Illustrative scene of a grower scouting newly emerged corn rows
Scouting corn emergence and row uniformity.

Step 6 of 7 · Harvest

Plan grain harvest and handling with the buyer

Settle these before planting

  • Intended grain use, grade and delivery requirements.
  • Hybrid maturity and expected harvest sequence.
  • Combine, transport, drying and storage capacity.
  • How wet-weather access or harvest delay will be handled.
  • Current grain quality, moisture and buyer specifications.

Germany planning note

Match maturity group to grain dry-down, drying costs and storage. Use crop heat sums to track maturity rather than assuming a fixed harvest date.

Aerial view of field-corn harvest machinery and a trailer carrying harvested corn
Aerial view of corn harvest and field-to-trailer crop movement; equipment, timing and handling vary by operation.

Step 7 of 7 · Reference

Sources and reference dates

These are the research and regional production sources used to build the decisions above. The guide brings that evidence into one field-to-harvest sequence.