Question 1

How does a vertical NFT tower system work?

Accepted Answer

In a vertical NFT tower, nutrient solution is pumped to the top of each tower and flows down through a series of planting holes in a thin film, feeding roots as it descends before returning to the reservoir. Towers maximise growing density in a small footprint — a 1.8 m tower with 4 sites/m provides 7 growing spots in less than 0.1 m² of floor space.

Question 2

How far apart should vertical towers be spaced?

Accepted Answer

Space towers at least 50–60 cm apart to allow adequate light penetration to lower sites. In indoor setups, hang grow lights centrally between rows. For outdoor or greenhouse use, orient towers north–south to minimise shading and maximise the sun's arc across the canopy.

Question 3

Can the water in a vertical tower be recirculated?

Accepted Answer

Yes — vertical NFT towers use a closed-loop recirculating system. The pump runs on a timer (typically 15 minutes on, 15 minutes off) to balance root oxygenation and moisture. Monitor EC and pH daily, top up with water as levels drop, and do a full reservoir change every 7–10 days.

Vertical Tower Capacity

Vertical Tower Capacity