Description
Athena CaMg is designed to supplement either of our 2-part liquid formulas. Some cultivars and growing conditions may require higher doses of Calcium, Magnesium, Iron and Nitrogen during heavy growth and development phases.
- Dilution / Dose
- 2.5ml/gallon of water
- When To Use
- Any stage, as needed — an optional supplement, not a required part of the base schedule
- Substrate Fit
- Especially useful with RO water and inert media (coco, rockwool)
- Grower Notes
- Grow AB and Bloom AB already contain Ca/Mg — this tops up demanding cultivars or heavy growth phases, it doesn't replace the base feed.
You can check out their Athena Blended Line Feed schedule, and other associated Athena Procedures here.
This product effectively corrects these common deficiencies without throwing off overall elemental balance. In systems using reverse osmosis (RO) water and plants grown in inert media, such as coco and rockwool, Athena CaMg is particularly useful. Although our 2-part formulas already provide sufficient levels of Calcium and Magnesium, some growers require find supplementation helpful in demanding conditions.
Application Rates
Add 2.5 mL per gallon of water during all stages as needed.
See Feed Schedules for specific application recommendations
For those that may want some PPFD reference and have an Apogee meter: check out the grow guide by Poetry of Plants
Best Practices
- Shake well before use.
- Use clean measuring instruments--do not put anything into the bottle.
- Some applications may require different dosages.
- Recommended for hydroponic use, especially with inert media and when using reverse osmosis (RO) water.
- Monitor EC regularly and adjust accordingly based on crop and growth stage.
- Adjust to pH to proper levels after mixing all fertilizers and additives.
- Store closed in original packaging at a temperature between 45° F and 85° F.
How much Athena does your grow actually need?
Tell us your medium, pot size and plant count. The Feed Chart Calculator builds your week‑by‑week chart with target EC, works out every bottle for the whole run, and puts them straight in your basket. You can price Athena against twelve other brands while you are there.




