How do I flush? It’s as simple as just feeding plants water. If you grow in a hydroponic system that doesn’t use media, flush for around 7 days at the end of your harvest.

How often should I flush my hydroponic system?

Hydroponic solution should be fully changed out once the volume of added top-off water equals the total volume of the tank, usually around every two weeks. This prevents over-accumulation of nutrients, bacteria, and fungi.

What does Flushing mean in hydroponics?

Flushing is the process right before you harvest of trying to flush out all the excess salts, nutrients and other contaminants that build up in your plants. The way that most growers flush their plants is by giving them plain water with no nutrients for a set period of time.