# High-frequency fertigation

> High-frequency fertigation feeds small volumes of nutrient solution many times a day, keeping the root zone consistently moist and fed so small pots can produce large plants.

- Canonical: https://genetixbay.com/knowledge/glossary/high-frequency-fertigation.html
- Also written: HFF, high frequency fertigation, high-frequency feeding, pulse feeding
- Glossary category: Systems and media · Evidence: Grower practice
- Status: Draft: awaiting expert review · Updated: 2026-10-31
- Licence: CC BY-SA 4.0 (https://creativecommons.org/licenses/by-sa/4.0/), attribute "GenetixBay cannabis glossary"

High-frequency fertigation (HFF) means irrigating with nutrient solution several to many times per day, often from 4 to 20 or more small events in the light period, instead of watering thoroughly every few days. The [root zone](https://genetixbay.com/knowledge/glossary/root-zone.md) stays close to [container capacity](https://genetixbay.com/knowledge/glossary/field-capacity.md) with a steady nutrient concentration, so water and nutrient stress never build up.

## In practice

HFF is used mostly with [coco](https://genetixbay.com/knowledge/glossary/coco-coir.md) and [rockwool](https://genetixbay.com/knowledge/glossary/rockwool.md) on [drip systems](https://genetixbay.com/knowledge/glossary/drip-irrigation.md), because they [drain](https://genetixbay.com/knowledge/glossary/runoff.md) fast and hold plenty of air even when wet. Each event is small, sized so that runoff accumulates to the target fraction over the day. The approach lets growers use smaller containers: the medium no longer has to store days of water.

## Myth check

House position on [pot size](https://genetixbay.com/knowledge/glossary/pot-size.md): big things come in small packages if you push nutrients and water hard enough. The founder has harvested more than 4 oz (113 g) dry from a 16 oz (about 0.5 L) cup with high-frequency fertigation. Pot size is a trade-off against feeding frequency, not a fixed rule. Evidence: Grower practice, house-endorsed. See [drain-to-waste and crop steering](https://genetixbay.com/knowledge/systems/drain-to-waste-crop-steering.md).

## Don't confuse with

- **Crop steering**: may use HFF in its schedules, but deliberately varies [dryback](https://genetixbay.com/knowledge/glossary/dryback.md).

## Related terms

[Fertigation](https://genetixbay.com/knowledge/glossary/fertigation.md), [Pot size](https://genetixbay.com/knowledge/glossary/pot-size.md), [Coco coir](https://genetixbay.com/knowledge/glossary/coco-coir.md), [Drip irrigation](https://genetixbay.com/knowledge/glossary/drip-irrigation.md), [Dryback](https://genetixbay.com/knowledge/glossary/dryback.md)

## Read more

- [Drain-to-waste drip and crop steering (generative vs vegetative dryback)](https://genetixbay.com/knowledge/systems/drain-to-waste-crop-steering.md)
- [Growing in coco coir](https://genetixbay.com/knowledge/systems/coco.md)

## Sources

1. Raviv M, Lieth JH, Bar-Tal A (eds), 2019. Soilless Culture: Theory and Practice, 2nd ed. Elsevier. https://doi.org/10.1016/C2015-0-01807-5
2. Poorter H, Bühler J, van Dusschoten D, Climent J, Postma JA. 2012. Pot size matters: a meta-analysis of the effects of rooting volume on plant growth. Functional Plant Biology 39(11):839-850. https://doi.org/10.1071/FP12049