Regional production overview · Netherlands
Dutch commercial sweet-potato trials are documented in Midden-Noord-Brabant. A regional guide uses the Brabant trial area and the Dutch grower network’s 15–31 May transplant window instead of a single national climate point.
Midden-Noord-Brabant production and trial focus
Growing for a home garden? See the general sweet potato guide.
Regional crop context
The EU-supported Brabant Sweet project documents commercial development and variety trials on clay and sandy soils in Midden-Noord-Brabant; the Dutch grower network describes current field practice.
The climate point represents the Brabant trial area. The 15–31 May transplant period is Dutch grower-network advice, not a date recorded for each individual project plot.
Step 1 of 7 · Assess
Coordinate slip delivery, ridge forming, biodegradable film, irrigation after transplanting and lifting capacity. The Dutch network is continuing to compare density and variety performance.
6 topics still to verify· planning aid only, not a suitability score
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Need a field-specific review? Run a coordinate-level farm audit for localized conditions.
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
View the Midden-Noord-Brabant guide for its local climate profile and grower-network planting period.
The Brabant Sweet project ran commercial development and annual variety trials in this region on clay and sandy soils.
Planting reference: 15–31 May · Dutch grower-network guidance
View local climate and growing guideStep 3 of 7 · Prepare
Dutch commercial trials include both clay and sandy soils. Form ridges that warm and drain the slip zone; apply biodegradable black film where used in the production system.
Keep bed height and shape consistent with soil texture, water movement and the equipment used on the farm.
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
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.
The Dutch grower-network research calls 30 cm the common within-row spacing. Row spacing follows a published European field-trial range; set it to the bed and machinery.
Planting calculator
Estimated slips
37,037
at 90 × 30 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
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.
Water immediately after setting and maintain enough moisture for root establishment. Track rainfall and soil moisture; avoid keeping beds saturated.
Scout early and maintain a weed-free start through canopy closure. Choose current control methods for the farm’s production system.
Wireworms, flea beetles and root-knot nematodes can downgrade roots. Keep field history and scouting records tied to each harvest lot.
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
The Dutch network reports 125–145 growing days. Schedule lifting from the transplant date and selected cultivar, then cure roots promptly.
Harvest period
Plan by variety, market size, planting date, field condition and frost risk.
Cure
A crop-level curing reference is 7–10 days with airflow; use the facility and buyer protocol for the harvested lot.
Store
Maintain stable temperature, humidity and ventilation after curing.
Step 7 of 7 · Reference
Dutch transplant dates, frost avoidance, growing duration, warm ridge, film and irrigation practices.
Dutch commercial research on cultivars, in-row plant distance, density, soil type and storage.
Regional commercial trials, cultivar testing on clay and sand, mechanization and production scale-up.
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.
Crop-level soil-temperature context, bed preparation, equipment-led row spacing and the relationship between plant density and root size.
Crop-level transplant establishment, slips, frost sensitivity and raised-bed practice. Missouri calendar dates are not applied to other regions.
Shared crop-level reference for curing and storage conditions. Its Texas planting calendar is used only on the Texas page.
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