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What is Nutrient Film Technique? A Complete Guide for Growers

What is Nutrient Film Technique
23
Mar

Nutrient Film Technique (NFT) is a highly efficient hydroponic growing method, continuously delivering nutrient-rich water directly to plant roots. This soilless system is popular among commercial and hobbyist growers due to its water efficiency, oxygenation benefits, and scalability.

How Does Nutrient Film Technique Work?

NFT systems operate by circulating a thin film of nutrient solution over the rootzone. This film allows plants to absorb essential nutrients while maintaining excellent oxygen exposure. The process follows these key steps:

  1. Nutrient Flow: A pump delivers the nutrient solution from a reservoir to a sloped channel or tray.
  2. Root Absorption: The solution flows in a thin layer, ensuring constant nutrient uptake while keeping roots oxygenated.
  3. Recirculation: Excess solution drains back into the reservoir for reuse, preventing waste and maximising efficiency.

Unlike other hydroponic methods, NFT does not require a growing medium. Instead, plants are housed in channels or tubes, where the roots are exposed to the water film and air. Without growing media, which absorbs some of the nutrients in other systems, plants in NFT systems grow unrestricted.

Benefits of Nutrient Film Technique

NFT hydroponic systems offer several key advantages:

  • Maximised Oxygenation – Roots are exposed to high levels of oxygen, promoting rapid growth and strong plant development.
  • Efficient Water & Nutrient Use – The recirculating system reduces water waste and minimises nutrient loss.
  • Faster Growth Cycles – Plants receive a consistent nutrient supply, leading to faster maturation and higher yields.
  • Scalability – Suitable for both small-scale and large commercial operations, with easy system expansion.
  • Reduced Growing Medium Costs – As NFT requires little to no growing medium, growers save on substrate expenses.

Potential Challenges of Nutrient Film Technique

While NFT is highly effective, it does come with certain considerations:

  • Power Dependence – The system relies on a pump for continuous nutrient flow, which makes it vulnerable to power outages. If a power outage does happen, plants will be damaged within a couple of hours.
  • Root Drying Risks – If the flow rate is too low or interrupted, roots are prone to drying out quickly, therefore damaging plant health.
  • System Maintenance – Algae buildup and clogging can occur in the channels, requiring regular cleaning and monitoring. It’s recommended to use a drip clean product throughout the grow to prevent this.
  • Limited Crop Selection – NFT is ideal for leafy greens and herbs, but may not support large, heavy-fruiting plants effectively.

Choosing the Right NFT System

At Global Air Supplies, we offer two high-performance Nutrient Film Technique systems to suit growers of all levels.

NutSystems GT NFT Systems

The NutSystems GT range is an excellent choice for growers seeking a reliable, easy-to-use NFT setup. Key features include:

  • Compact & Efficient Design – Ideal for small to medium grow spaces.
  • Even Nutrient Distribution – Ensures uniform growth and maximised yield potential.
  • Low Maintenance – Simple setup with easy access for cleaning and nutrient adjustments.

The GT System is perfect for those looking for a proven, cost-effective NFT system that delivers consistent results.

NutSystems MultiDuct NFT Systems

For commercial and large-scale growers, the NutSystems MultiDuct offers an advanced multi-channel NFT solution with superior performance:

  • Scalable Modular Design – Supports larger grow operations with multiple channels for increased plant capacity.
  • Optimised Root Growth – Enhanced oxygenation and nutrient delivery for bigger, healthier plants.
  • Durable & Reliable – Built for long-term use with minimal maintenance.

The MultiDuct system is perfect for high-yield commercial grows, offering a professional NFT solution with exceptional efficiency.

Is Nutrient Film Technique Right for You?

If you’re looking for a water-efficient, high-oxygen hydroponic system, then Nutrient Film Technique is a powerful solution. Whether you’re starting with a NutSystems GT system or scaling up with a NutSystems MultiDuct, NFT helps you maximise growth potential while reducing waste.