# Feed chart

> A feed chart is a manufacturer's or grower's schedule of nutrient doses by week or stage; treat it as a ceiling to test against, not a rule.

- Canonical: https://genetixbay.com/knowledge/glossary/feed-chart.html
- Also written: feeding chart, feeding schedule, nutrient schedule, feed schedule, nute schedule
- Glossary category: Nutrients · 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"

A feed chart is a table giving how much of each product to add per litre, and the expected [EC](https://genetixbay.com/knowledge/glossary/ec.md), for each week or stage of growth. Manufacturers publish them for their product lines; experienced growers keep their own.

## In practice

Manufacturer charts are often written for maximum product use and fast-feeding cultivars, and they frequently stack several additives on a base. Many growers start at half to three-quarters of chart strength and adjust by watching the plants and [runoff](https://genetixbay.com/knowledge/glossary/runoff.md) EC. Charts are also system-specific: [coco](https://genetixbay.com/knowledge/glossary/coco-coir.md), [rockwool](https://genetixbay.com/knowledge/glossary/rockwool.md) and [DWC](https://genetixbay.com/knowledge/glossary/dwc.md) need different strengths and frequencies than soil. Translating a chart into [elemental ppm](https://genetixbay.com/knowledge/glossary/elemental-ppm.md) shows what it really delivers and makes comparisons possible.

## Don't confuse with

- **Recipe**: a formula in grams of salt or mg/L of each element, independent of a product line.
- **Feed by stage guide**: general targets, not tied to a bottle.

## Myth check

A feed chart is not evidence that every additive on it is needed. Trials show cannabis yield plateaus with moderate nutrient strength and phosphorus (Evidence: Established). Test your cultivar. See [feed by stage](https://genetixbay.com/knowledge/nutrients/feed-by-stage.md).

## Related terms

[ppm of an element](https://genetixbay.com/knowledge/glossary/elemental-ppm.md), [A/B nutrient](https://genetixbay.com/knowledge/glossary/a-b-nutrient.md), [Per-element dosing](https://genetixbay.com/knowledge/glossary/per-element-dosing.md), [Nutrient burn](https://genetixbay.com/knowledge/glossary/nutrient-burn.md), [Bloom booster](https://genetixbay.com/knowledge/glossary/bloom-booster.md)

## Read more

- [Building a cannabis feed by stage: ppm targets per element and how to hit them](https://genetixbay.com/knowledge/nutrients/feed-by-stage.md)

## Sources

1. Bevan L, Jones M, Zheng Y. 2021. Optimisation of nitrogen, phosphorus, and potassium for soilless production of Cannabis sativa in the flowering stage using response surface analysis. Frontiers in Plant Science 12:764103. https://doi.org/10.3389/fpls.2021.764103
2. Hershkowitz JA, Westmoreland FM, Bugbee B. 2025. Elevated root-zone P and nutrient concentration do not increase yield or cannabinoids in medical cannabis. Frontiers in Plant Science 16:1433985. https://doi.org/10.3389/fpls.2025.1433985