Reusing Net Cups: Clearing Roots plus Cleaning Cups
Reusing net cups works well once old roots plus media are cleared plus each cup is cleaned. Iowa State University Extension notes reusing plastic containers saves money plus cuts plastic waste, as long as they are cleaned plus disinfected before each new use.
The short answer
Clear out roots plus media, scrub, soak plus rinse. Iowa State advises brushing off loose debris, washing in soapy water, then soaking in one part household bleach to nine parts water for at least 10 minutes before a final rinse. Clean between crops.
Can net cups be reused?
Yes. University of Minnesota Extension notes a net pot is simply a pot with holes or slits in the sides so roots can reach the solution. Iowa State notes fungi plus insects can linger in old containers plus their debris, so a clean cup gives the next crop a fresh start.
How do you get old roots out?
Iowa State advises a brush or rag to clear all loose particles first. UMass Amherst notes organic residues reduce how well disinfectants work, so clear every root from the slots before the soak.
| Step | Detail | Source |
|---|---|---|
| Clear | Brush off loose debris | Iowa State |
| Wash | Soapy water plus rinse | Iowa State |
| Soak | 1 part bleach to 9 parts water | Iowa State |
| Time | At least 10 minutes | Iowa State |
| Mix | Use within two hours | Iowa State |
Source: Iowa State University Extension.
How do you sanitize net cups?
Iowa State advises soaking containers in one part household bleach to nine parts water for a minimum of 10 minutes, then rinsing. Use the mix within two hours. UMass notes soap residue can weaken some disinfectants, so rinse well.
How to: step by step
- Pull out the old plant.
- Push roots through the slots.
- Brush off loose media.
- Wash in soapy water plus rinse.
- Soak 10 minutes in the bleach mix.
- Rinse plus air dry.
Troubleshooting
Roots jammed in slots: soak first. Iowa State advises washing before the dip.
Film on cups: residue. UMass notes organic matter lowers disinfectant action.
Media reused: clean it too. Minnesota advises cleaning plus sanitizing reused substrate.
For hydroponic care see hydroponic in different mediums plus caring for your hydroponic system. Read aquarium water for cannabis plus cannabis root hairs. Kind Seed Co also stocks cannabis seeds.
Sources
- How to clean and disinfect plant containers, Iowa State University Extension
- Produce safety in hydroponic and aquaponic operations, University of Vermont Extension (NECAFS)
- Small-scale hydroponics, University of Minnesota Extension
- Cleaning and disinfecting the greenhouse, UMass Amherst Extension Greenhouse and Floriculture
FAQ
Why clean net cups before reuse?
Iowa State University Extension notes fungi plus insects can remain in old containers plus the debris that builds up in them.
What bleach mix works for net cups?
Iowa State University Extension advises one part household bleach to nine parts water for at least 10 minutes, then a rinse.
Can you reuse the media inside net cups?
University of Minnesota Extension advises cleaning plus sanitizing reused substrate before planting again.
What is a net cup?
University of Minnesota Extension notes a net pot is a pot with holes or slits in the sides so roots can reach the nutrient solution.
When should net cups be cleaned?
UMass Amherst Extension advises cleaning between crop cycles when growing areas are empty.
