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Crop solutions / Protected cultivation

Greenhouse Irrigation
for Crop Production

Build root-zone irrigation around your tomatoes, cucumbers or peppers. Match drip outlets, filtration and fertigation components to soil beds or substrate growing.

Explore growing systems ↓

Illustrative applications—not completed TREX customer projects.

Start at the root zone

Different growing media.
Different watering decisions.

  • Group similar needsSeparate zones by crop, growth stage and growing medium instead of running every house on one schedule.
  • Check deliveryMeasure representative outlet volumes at the start and end of laterals—not just supply pressure.
  • Match the growing unitChoose outlet placement for soil beds, pots or bags and leave access for inspection.
Drip outlet delivering water into a greenhouse vegetable growing bag
Select the growing system first

Soil beds or substrate containers?

Both can use drip irrigation, but their water storage, drainage and scheduling requirements differ.

Greenhouse cucumber or pepper rows in soil beds with drip laterals

Soil-bed drip irrigation

Use drip tape or inline dripline matched to bed width, planting pattern and soil water movement. Check moisture through the active root zone; surface appearance alone can be misleading.

Trellised greenhouse vegetables in substrate bags with individual drip outlets

Bag & pot drip irrigation

Match online emitters and distribution accessories to container volume and growing medium. For short pulses, verify actual delivered volume, minimum operating pressure and drain-down behaviour.

Need propagation mist, bench watering or nursery micro-sprinklers? See our Greenhouse & Nursery Irrigation page. Humidity control does not replace root-zone watering.
Water quality comes first

Connect water, nutrients and zone control.

  1. 01 / ASSESSSource water
  2. 02 / PREPAREFiltration & dosing
  3. 03 / DELIVERValves & drip outlets
  4. 04 / CHECKRoot zone & drainage
Greenhouse filter, fertilizer injection assembly, gauges and zone valves

Confirm the complete arrangement

  • Source-water analysisReview salts, alkalinity and relevant contaminants before choosing equipment or a nutrient plan.
  • Filtration & pressureFollow emitter requirements and allow for pressure losses. Screen and disc filters do not remove dissolved salts.
  • Fertilizer injectionVerify compatibility, actual injection rate and suitable backflow protection. A Venturi is not automatically a complete dosing-control system.
  • MonitoringUse calibrated EC/pH measurements and crop-specific targets; confirm sensor and controller compatibility separately.
Manage what the crop receives

Measure. Adjust. Keep outlets clear.

Before irrigation

Check crop stage, greenhouse conditions and soil or substrate moisture. Set zone operation from these observations rather than one fixed timer setting.

During delivery

Check pressure, outlet volume and feed EC/pH where fertigation is used. Compare readings at representative points, including lateral ends.

After delivery

Review root-zone moisture and, for substrate systems, drainage volume and quality. Flush and service equipment according to the selected system’s requirements.

Drainage reuse needs a designed collection, treatment and monitoring arrangement. Do not return untreated drainage directly to the feed tank or assume ordinary filtration provides disinfection.
Before you choose

Greenhouse irrigation FAQs

Can all greenhouse crops share one irrigation schedule?

Not automatically. Crop stage, growing medium, container size and greenhouse conditions affect demand. Group compatible needs and verify actual delivery within each zone.

Do I need pressure-compensating or anti-drain emitters?

Evaluate pressure variation and the effect of drain-down on short pulses. These features have model-specific operating limits; confirm performance with the intended pressure and cycle duration.

What EC and pH should I use?

There is no single setting for every crop or medium. Set targets with a qualified crop adviser using source-water analysis, fertilizer composition and root-zone or drainage measurements.

Plan irrigation
around your growing system.

Send crop types, greenhouse area, bed or container layout, growing medium, water analysis and measured flow and pressure.

Contact TREX

Confirm product suitability and availability before ordering. Sensors, dosing automation and on-site installation are not implied.

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