Frequently Asked Questions

Drum seeders handle seed diameters of 0.3–3.0 mm; needle seeders extend the range to 0.3–4.0 mm. Both platforms are suitable for vegetable, flower, and tobacco seeds, and work with both raw and pelleted seed. This covers everything from fine leafy-green seed (lettuce, brassicas) up to large seeds such as corn and squash.

Yes — on a needle seeder, with the seeding components matched to each seed class. Large seeds (corn, squash) use large-gauge needles; small and mid-size seeds (peppers, cabbage, leafy greens) use smaller gauges. You change the needle set, not the machine. Changeover is a routine operation designed for growers who rotate crops.

Verdalink machines support 50, 60, 72, 105, 128, and 200-cell plug trays in both plastic and foam. Every machine is configured to the customer's actual tray specification — tray dimensions vary widely between markets and suppliers, and that variation is normal. Switching between tray formats only requires swapping the tray holder, not modifying the machine. One tray holder set (built to your specification) is included as standard; additional holder sets are available as accessories.

Usually yes — the seeding component, not the tray setup. On a needle machine you change the needle set; on a drum machine you change the drum or seeding module. This is because seed diameter, weight, and shape vary significantly between crops, and precise single-seed pickup depends on matching the pickup orifice to the seed. Each machine ships with a base component set, and additional sets are specified according to your crop plan.

Generally, yes. Pelleting gives seeds a uniform, near-spherical geometry, which improves vacuum pickup consistency and raises the effective single-seed rate — particularly for small or irregular seeds such as lettuce. Raw seed works well too; we simply recommend telling us whether your seed is pelleted when specifying the machine, as it affects the optimal needle or drum configuration.

Drum seeders and drum lines: ≥97% sowing accuracy with a missing-hole rate of ≤3%. Needle seeders and needle lines: ≥95% accuracy with a missing-hole rate of ≤5%. These figures come from three engineering choices: a high-specification vacuum system for stable seed adhesion, a patented anti-clogging needle design for consistent performance over long continuous runs, and synchronized cycle timing across the full line.

The most common cause is the seed itself, not the machine. Seed lots differ in pelleting, single-seed (singulation) rate, and shape — round versus flat seeds behave differently under vacuum pickup. The machine controls placement accuracy; it cannot correct seed quality. If you are comparing results, compare seed lots first.

Multi-seed sowing is a standard configuration, not a workaround. Typical setups include 2–3 seeds per cell for hydroponic production, and up to 5–8 seeds per cell for specific applications (subject to confirmation of the variety and seed size). Tell us your target seeds-per-cell when requesting a quote and we will configure the seeding module accordingly.

Complete vertical drum lines: 600–1,200 trays per hour. Complete horizontal needle lines: 400–600 trays per hour. Bench-top and double-row needle seeders run at lower rates suited to small and medium nursery operations. Actual sustained throughput also depends on tray format and operator workflow around the line (tray staging and removal).

We deliberately avoid quoting area figures, because area coverage depends on crop variety, planting density, and row configuration — the same machine can cover very different areas for lettuce versus corn. The reliable planning metric is plants per hour (or trays per hour for nursery seeding). Share your crop, density, and target schedule and we will translate that into a machine recommendation and realistic daily output.

Standard machines operate on 220V, with a total installed power of approximately 3 kW for a complete line (standalone accessories such as the FTH watering unit and ZPH tray filler draw 0.75–1.5 kW each). Export configurations are built to the destination country's standard — 110V, 220V, or 380V, 50 or 60 Hz, single-phase or three-phase, with the correct plug type.

When requesting a quote, please tell us: your country, site voltage, frequency, and whether three-phase power is available. This determines the motor, vacuum pump, and compressor configuration, so we confirm it before every international order.

Pneumatic seeding systems require compressed air. An appropriately sized compressor is normally included with complete line packages; for standalone machines, we will either include a matched compressor or specify the air supply requirements so you can use existing plant air. The exact inclusion is itemized in your quotation.

A complete vertical drum line measures approximately 8.0 m × 2.5 m × 2.5 m (L×W×H) and weighs around 800 kg. Beyond the machine footprint, plan working space at both ends of the line for empty tray staging and finished tray removal — in practice, smooth tray logistics matters as much as machine speed for sustained throughput. We provide a layout drawing for your site as part of the quotation process.

All Verdalink equipment is priced on request, because the final configuration — seeder platform, tray specification, needle or drum sets, line modules, voltage, and certification requirements — varies by customer. A quotation itemizes exactly what is included. Multi-unit and project orders qualify for volume pricing, and we operate a dealer program for distribution partners.

Base configuration typically includes one tray holder set built to your tray specification and one base needle set (or drum module) matched to your primary crop. Complete line packages normally include the air compressor. Additional tray holders and needle/drum sets for other crops are quoted as accessories. Every quotation lists the full scope of supply so there are no surprises at delivery.

Yes. Custom tray formats, non-standard line layouts, OEM manufacturing, and custom engineering are core services. If your trays, greenhouse layout, or crop program do not match a standard configuration, send us the details through the quote form — custom configuration is the norm in commercial nursery projects, not the exception.

Every machine ships with documentation covering installation, operation, and routine maintenance. We provide remote commissioning support (video guidance during setup and first runs) as standard.

Wear components — needles, seals, and pickup parts — are standardized and available for order. For international customers we recommend including a spare parts kit with the initial order, which covers the components most likely to need replacement in the first seasons of operation and avoids waiting on international shipping.

Warranty terms are stated in every quotation and sales contract.

Three practical criteria:

Growth cycle: is the crop's cycle relatively long (roughly 60 days or more)?
Weed pressure: is the crop slow to establish, giving weeds a head start in the field?
Production model: are you growing organic, reduced-pesticide, or herbicide-free?

If your crop meets even one or two of these, plug seedling production is usually a strong fit. If none apply — a fast, competitive, conventionally grown crop — direct seeding is often the more economical choice.

Because the deciding factor is not the crop's name but its cycle length and the grower's production model. Take choy sum as an example: a fast-maturing type (30–40 days) is cheaper to direct-seed, while a late-maturing type (70–80 days) is far better transplanted — raising seedlings off-field and transplanting nearly doubles land turnover, because the field is occupied only for the finishing phase.

Yes, and the gain is structural rather than marginal. The first 20–30 days of growth happen in the greenhouse, so field time per crop shrinks and the same land fits an additional rotation per season. Uniform plug seedlings also emerge and mature more consistently, which improves harvest uniformity — a meaningful factor for growers selling into programs with size and timing specifications.

Lettuce establishes slowly while weeds establish fast. Direct-seeded lettuce demands heavy weed control during exactly the phase when the crop is least competitive. A transplanted seedling enters the field already ahead of the weeds. In organic and herbicide-free systems, transplanting lettuce is effectively a requirement rather than a preference.

Organic systems cannot rely on herbicides, so weed control falls to labor — one of the largest and fastest-rising costs in organic vegetable production. Precision plug seeding plus transplanting attacks this from two directions: seedlings enter the field with a competitive head start, and precise single-seed placement eliminates thinning. In essence, the equipment substitutes engineering for both chemicals and manual labor.

Yes — and this is worth weighing at purchase time. The needle seeding platform has the broadest adaptability across seed sizes, and Verdalink lines are modular: seeding modules, tray holders, and line stations can be reconfigured as your program evolves. Equipment that survives a change in crop strategy protects your investment far better than a machine optimized for a single crop you may not be growing in five years.