Hydroponic Channels & NFT Layout & Plant Sites
Designs NFT
Enter the bed width, channel spacing, bed length and plant spacing to get the number of NFT channels, plants per channel, total plant sites and total channel length — so the system fits and feeds.
Design your NFT bed
Next: run 20 channels (200 m total) with sites every 0.2 m for 1,020 grow positions; size your pump and reservoir to that channel length and site count.
Tighter channel/plant spacing packs more sites but reduces airflow and raises disease risk for leafy greens. Real layouts also lose a little length to end manifolds.
Hydroponic channels — key facts
- Channels
- bed width ÷ channel spacing
- Plants per channel
- channel length ÷ plant spacing
- Total plant sites
- channels × plants per channel
- Total channel length
- channels × channel length
- Leafy greens spacing
- ≈ 0.15–0.25 m
- Tighter spacing
- more sites, more flow & light
- Capacity driver
- total plant sites
- Privacy
- Runs in your browser; nothing uploaded
Pack the channels — but keep the flow and light
Hydroponic NFT systems grow plants in parallel channels fed by a thin film of nutrient solution. Two spacings set the whole capacity: how far apart the channels sit across the bed, and how far apart the plant sites sit along each channel. Tighten either and you fit more plants — but a denser canopy needs more light, and more plants drawing solution need more flow from the pump. The layout is a balance between packing sites and keeping every plant fed and lit.
This tool gives the number of channels, plants per channel, total plant sites and total channel length from your bed and spacing dimensions. Use it to size capacity, order the right running metres of channel, and check the system against your pump and light before you build. Pair it with the Greenhouse Bench, Vertical Farming Rack and Hydroponic Nutrient tools for a full soilless plan.
Size capacity
Know total plant sites before you build.
Order channels
Get the total running metres to buy.
Tune spacing
See how density changes plant sites.
Match flow & light
Avoid packing past what you can feed.
Frequently Asked Questions
What does this hydroponic layout decide?+
NFT and similar hydroponic systems grow plants in parallel channels with a thin film of nutrient solution flowing through them. The bed width and channel spacing decide how many channels fit, and the plant spacing along each channel decides how many plant sites it holds. Together they set the total plant sites — the capacity of the whole system.
How many channels fit the bed?+
Divide the bed width by the channel spacing (centre to centre) to get the number of parallel channels. Closer spacing packs in more channels and more plants, but the canopies start to crowd and shade each other, so spacing is a balance between density and giving each row enough light and air.
How many plants go in each channel?+
Divide the channel (bed) length by the plant spacing along the channel to get the plant sites per channel. Multiply by the number of channels for the total plant sites. For example a 10 m channel at 0.2 m spacing holds about 50 sites; ten such channels give around 500 plant sites.
What is a plant site?+
A plant site is one growing position — a hole or net-pot location in the channel where a single plant sits. Total plant sites is the headline capacity figure: how many plants the system can carry at once. It drives your seedling raising, nutrient demand and expected harvest per cycle.
What is total channel length and why does it matter?+
Total channel length is the number of channels multiplied by the length of each — the total running metres of channel you need to buy, plumb and feed. It sizes your material order, the pump and reservoir duty, and the drainage, so it's a key figure for both costing and the hydraulic design of the system.
Why does tighter spacing need more flow and light?+
Packing channels and plant sites closer raises capacity but also raises demand: more plants drawing nutrient need a higher flow rate and stronger pump to keep the film fed, and a denser canopy needs more light to avoid shading lower leaves. Push density too far and growth and quality drop, so match spacing to your light and flow.
What plant spacing should I use?+
Use the spacing recommended for your crop and channel type — leafy greens and herbs sit close (roughly 0.15–0.25 m), while larger plants need more room. Tighter spacing lifts plant sites but crowds the canopy. The calculator lets you try spacings and instantly see how plant sites and total capacity change.
Does this work for vertical or stacked systems?+
Yes — treat each growing layer or tier as its own bed and run the numbers per layer, then add the layers up. For racks and towers, the Vertical Farming Rack calculator handles the stacking; this tool sizes the channels and plant sites on any single growing plane you give it.
Are the figures precise?+
They're solid planning figures. Real systems lose a little length to end caps, manifolds and slope, and usable plant sites depend on exact net-pot spacing and edge effects. Use the numbers to design and cost the layout, then confirm against the actual channels and fittings when you build.