Nutrient Film Technique (NFT)
A thin film of nutrient solution flows continuously through sloped channels, bathing bare root mats without submerging them. Oxygen diffuses directly into the exposed root surface while the film delivers water and nutrients.
Specs
- Setup cost
- $150–600
- Monthly op cost
- $10–25
- Footprint
- 3–12 sqft
- Typical draw
- 25 W (peak 45 W)
Strengths
- Low water and nutrient use
- Uniform delivery across channels
- Scales horizontally
- Fast turnover suited to leafy greens
Weaknesses
- Pump failure risks rapid wilt
- Channel slope must be precise
- Not suited to heavy or fruiting plants
- Clogging risk from root debris
Best for
Linked names lead to a full hydroponic guide for that plant. Unlinked names will activate as those plants are added.
Compatible plant categories
- Leafy Greens
- Herbs
Required equipment
- Submersible pump
- Nft channels
- Reservoir
- Return plumbing
- Ph meter
- Ec meter
Sources
Data on this page is drawn from the following extension and research sources.
- Cornell CEA — Hydroponic Lettuce Handbook (Brechner & Both, 2013) (accessed 2026-04-22)
- UF IFAS Extension — Hydroponic Systems (EDIS) (accessed 2026-04-22)