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Growing Systems

Hydroponic Systems

A commercial hydroponic system delivers nutrient-enriched water to a soilless growing medium (or bare root) under precise EC/pH control, achieving yields 2–10× open-field for leafy greens, herbs and fruiting vegetables in a controlled environment.

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Role in the project

Hydroponic systems replace soil as the growth medium and are the yield engine of commercial protected cropping. Fertigation, drainage and pathogen control are engineered together with the greenhouse structure and climate.

Typical applications

  • Leafy greens and herbs (NFT, DWC)
  • Tomato, cucumber and pepper (rock-wool or coco-coir)
  • Strawberries (table-top with substrate)
  • Cannabis (rock-wool or coco-coir)

Selection criteria

Crop / system match

NFT for leafy greens; rock-wool for tomato/cucumber; DWC and ebb-and-flow for specific programmes.

Recirculation strategy

Closed-loop with disinfection or drain-to-waste — regulatory, water-cost and pathogen driven.

Sensor stack

EC, pH, drain-EC, drain-volume, temperature and dissolved-oxygen monitoring.

Engineering considerations

Nutrient recipe

Crop and growth-stage specific, adjusted to source water chemistry.

Disinfection

UV, slow-sand filtration or ozone by pathogen risk and cost profile.

Commercial considerations

CAPEX band

USD 30–120/m² of growing area depending on system and automation.

Procurement considerations

Substrate supply chain

Confirm substrate lead time and disposal route — often overlooked.

Common mistakes

  • Sizing tanks and drains for average, not peak, flow
  • No disinfection loop in closed systems — pathogen event wipes crop cycle
  • Nutrient recipe copied from another climate without water analysis

FAQ

NFT vs. DWC for leafy greens?
NFT dominates commercial leafy production for uniformity and labour efficiency; DWC applies where root-zone volume drives canopy performance. The RFQ captures crop and cycle.
Rock-wool or coco-coir for tomato?
Rock-wool for uniformity and control in high-tech Venlo; coco-coir where organic certification or waste route favours it.

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Financing & procurement tools

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