Athena Feed Chart
Athena Blended is a two-part liquid on Athena’s published weekly chart, and it runs the same way in coco, soil or rockwool. The chart below is Athena’s own schedule, with the target EC on every week. Underneath it, our free calculator fits it to your pot size, plant count and cycle length, and works out exactly how much you need to buy.
Build my Athena Blended chart →
The Athena Blended feed chart
Millilitres per litre of water. Veg here is four weeks and flower nine, which is the commonest UK cycle. If yours is longer or shorter, the calculator fits the same schedule to it rather than simply running out.
Swipe the chart sideways to see every week.
| Week | Grow A+B | CaMg | Cleanse | Bloom A+B | PK | Target EC |
|---|---|---|---|---|---|---|
| Veg week 1 | 2.9 | 1.0 | 0.9 | – | – | 2.1 |
| Veg week 2 | 2.9 | 1.0 | 0.9 | – | – | 2.1 |
| Veg week 3 | 2.9 | 1.0 | 0.9 | – | – | 2.1 |
| Veg week 4 | 2.9 | 1.0 | 0.9 | – | – | 2.1 |
| Flower week 1 | – | 1.0 | 0.9 | 3.2 | – | 2.3 |
| Flower week 2 | – | 1.0 | 0.9 | 3.2 | – | 2.3 |
| Flower week 3 | – | 1.0 | 0.9 | 3.2 | 1.1 | 2.5 |
| Flower week 4 | – | 1.0 | 0.9 | 3.2 | 1.6 | 2.6 |
| Flower week 5 | – | 1.0 | 0.9 | 2.6 | 2.4 | 2.4 |
| Flower week 6 | – | 1.0 | 0.9 | 2.4 | 2.6 | 2.3 |
| Flower week 7 | – | 1.0 | 0.9 | 1.3 | 3.2 | 1.7 |
| Flower week 8 | – | – | 0.9 | 1.1 | 2.6 | 1.5 |
| Flower week 9 | – | – | 0.9 | 1.1 | 2.6 | 1.5 |
Target pH 5.8 to 6.2. Grow and Bloom are never mixed in the same solution — it is a straight switch at 12/12.
The A+B pricing trap
A+B is one line, not two. When Athena sell you a “1 Gallon” of Grow A+B, that is a gallon of A and a gallon of B, and the price on the listing is for the pair. People routinely double their own estimate because they assume they need to buy each part separately.
The calculator treats the pair as a single item for exactly this reason, so the quantity it gives you is the number of pairs to order.
Mix to the EC, not to the millilitres
The doses above assume your water starts at zero. UK tap water usually sits between 0.3 and 0.5 EC before you add anything, and that counts towards the targets in the last column.
So on tap water you will reach the chart’s own EC with slightly less nutrient than it prints. Use the doses to get close and the meter to know. On RO, the printed figures are the ones to run.
What a full Athena Blended run costs
For a common UK setup, nine plants in 3 gallon Quick Fill coco bags, four weeks of veg and nine of flower, the whole cycle comes to about £197 across 5 products, mixing roughly 1,500 litres of feed.
The single biggest line on that bill is Athena Bloom A+B at around £63. That is worth knowing before you order, because it is usually the additives rather than the base that decide what a run costs.
The calculator prices your actual grow rather than this example, and prices the other fifteen brands alongside it, so you can see what you are paying for.
Which Athena line should I be on?
Blended is the liquid line. Pro Line is the same company’s dry salt system, mixed into a stock tank, and it works out considerably cheaper per run if you are willing to weigh powder and hold a flat EC.
- Athena Pro Line — Powder mixed into a stock concentrate, dosed to a target EC. Cheapest per litre at scale. Full chart on the Athena Pro Line Feed Chart page.
The calculator only ever lists the lines that suit the medium you pick, so you cannot accidentally run a soil chart in coco.
What you need for an Athena Blended run
Or let the calculator work out the sizes and quantities for your own grow and put the lot in your basket in one click.
Open the Athena Blended calculator →
The Hydro Bros is not affiliated with, endorsed by or approved by Athena. The figures above are transcribed from Athena’s own published feed chart. They are a starting point rather than a prescription: read your own runoff and your own meter, and adjust to your room.
