Mini Cucumbers — DutchGreenhouses

A label that has drifted further than any other in the crop

Mini cucumber is a small, thin-skinned fruit sold in multipacks and eaten without peeling. It is the type where the gap between the name and the product is widest: cultivars sold as mini decades ago were far heavier than the fruit the name describes today, so a specification written around the label alone will not produce the fruit a buyer expects.

What the crop needs

The crop is grown on substrate and carried on a high wire under the species climate recipe. Its distinguishing demand is harvest frequency: a small fruit reaching grade quickly means frequent picking, and a crop left a day too long moves out of the size specification rather than simply growing larger. Labour planning follows the pick interval, not the tonnage.

What the greenhouse has to do

Mini cucumber is picked often, and the greenhouse is laid out for that. A small fruit passes through its size window quickly, so the crop is walked far more frequently than a long cucumber crop. Path layout, internal transport and the distance from the furthest row to the pack area decide how much of the labour budget the walking consumes.

The climate work is cucumber climate: high transpiration, fast response, irrigation and humidity sized for the peak. What the size window adds is a low tolerance for variation. A cool bay or a dry section does not produce a smaller crop, it produces fruit outside the specification, so even transmission and even water delivery across the whole floor are what the building is being asked for.

DutchGreenhouses® specifies the structure, climate, screening and irrigation around the cucumber type, its pick interval and the local climate, so fruit reaches the pack inside its size specification. Get in touch to plan a cucumber greenhouse.

Long cucumbers

The wrapped Dutch standard, and the fastest crop in the house.

Midi cucumbers

Shorter than a long cucumber, and a category that has moved.

Snack cucumbers

The smallest format, sold to be eaten whole.

Climate

Heating, cooling, humidity control and carbon dioxide dosing.

Hydroponics

Substrate growing with drip supply and drain recirculation.

Questions

Mini cucumber, asked and answered

What decides the layout of a mini cucumber house?

Pick frequency. The crop is walked often, so path width, internal transport and the distance from the furthest row to the pack area carry more weight in the layout than they do for a slower crop.

What drives labour cost on mini cucumber?

Pick frequency. A small fruit passes through its size window quickly, so the crop is picked often and the labour plan follows the interval rather than the weight.

Does mini cucumber need a different climate from long?

The species climate recipe is shared. What differs is fruit count, pick interval and how tightly the fruit has to hold its size, and those shape the layout and the labour plan rather than the climate setpoints.

Crop data

Mini cucumbers — reference values

Reference values from the DutchGreenhouses crop model, each traced to its Dutch source below. Ranges describe published practice across systems and seasons; a project setpoint is calculated for the actual greenhouse, crop and climate.

Day climateMedium confidence¹²³

Air temperature: 24–24.8 °C
Relative humidity: 73–79 %
Vapour-pressure deficit: 0.62–0.86 kPa
Daily light integral: 16–20 mol/m²/d
Photoperiod: 16–18.5 h
CO₂ concentration: 600–800 ppm

Night climateMedium confidence¹⁴⁵

Air temperature: 21–22.4 °C
Relative humidity: 86–95 %
Vapour-pressure deficit: 0.19–0.35 kPa

Irrigation and root zoneMedium confidence¹²⁶

Supply EC: 2.8–3.5 mS/cm
Supply pH: 5.4–5.8 pH

Where these come from

WUR / Carpineti et al., 2024, WPR-1343 — Long-cucumber night transpiration. WUR report · High confidence · E035Controlled daylightless cells, cultivar Dee Flexion; strong treatment evidence but not a universal commercial recipe.
Kas als Energiebron / Botany & Plant Lighting, 2025, project 24019 — Lit high-wire cucumber 2024–2025. Public Dutch trial · High confidence · E036One 24-week winter crop and cultivar; capacity and source–sink strategy are system-specific.
Kas als Energiebron / Botany & Plant Lighting, 2025, project 23011 — Lit high-wire cucumber 2023–2024. Public Dutch trial · High confidence · E037One winter crop with three cultivars; observed settings are not universal optima.
WUR / de Gelder, 2016, GTB-1408 — High humidity and minimal moisture removal. WUR report · High confidence · E038Specific double-glazed greenhouse with film screen; demonstrates system dependence, not a humidity optimum.
WUR / de Zwart et al., 2017, GTB-1444 — Screens, humidity and dehumidification. WUR report · High confidence · E039System-energy relationship; crop risk still depends on dew, uniformity, air movement and disease pressure.
WUR, 2026, WPR-1263 — Cucumber substrate/fertigation context. WUR report · Medium confidence · E043Pathogen/root-environment experiment, not a commercial production optimum; retained only as supporting context.

These are reference values, not a specification. DutchGreenhouses does not publish project setpoints; those are calculated per greenhouse, crop and location.

From the knowledge base