Net pots and hydroponic growing media
The net pot supports the plant; the medium holds moisture and air around young roots. Choose a stable, clean medium that suits how often the system wets it.
The short version
The net pot supports the plant; the medium holds moisture and air around young roots. Choose a stable, clean medium that suits how often the system wets it. The useful test is not whether a method can work, but whether it keeps the roots supplied with water, dissolved nutrients and oxygen while the leaves receive enough light.
- Media should not crumble into pumps.
- The stem crown should sit above saturated material.
- Reusable clay pebbles need thorough cleaning.
A practical way to do it
- 1
Match pot size to mature stem and roots.
Make this change deliberately, then observe the plant and system before changing the next variable. That separation makes the result useful.
- 2
Rinse loose media before use.
Make this change deliberately, then observe the plant and system before changing the next variable. That separation makes the result useful.
- 3
Support the plug without crushing it.
Make this change deliberately, then observe the plant and system before changing the next variable. That separation makes the result useful.
- 4
Cover exposed wet media to reduce algae.
Make this change deliberately, then observe the plant and system before changing the next variable. That separation makes the result useful.
What to watch
Look at the whole system before diagnosing a single leaf. Check new and old growth separately, lift the lid to inspect root colour and texture, confirm that water or air is moving, and compare today’s readings with the last entry in your log.
Packing fine media tightly removes the air space roots need.
Make the setup easier to live with
Put inspection points where you can reach them without moving plants. Label cables, nutrient bottles and measuring tools. A waterproof tray, a marked full-water line and a simple notebook prevent more trouble than an elaborate controller. When a crop finishes, remove roots promptly and clean the parts you can now reach.
Questions people ask
What is the simplest way to act on this guide?
Match pot size to mature stem and roots.
What is the most common mistake?
Packing fine media tightly removes the air space roots need.
What should I record?
Write down dates, water volume, nutrient dose, pH and EC readings where relevant, plus one photograph. A short record makes patterns much easier to diagnose.
Sources
Checked 10 November 2026. Product labels and local conditions take precedence.
- Hydroponics gardening — Royal Horticultural Society
- Work using electrically powered equipment — Health and Safety Executive