Athena Blended Line Feeding Schedule: The Complete Feed Chart Explained
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Athena Blended Line Feeding Schedule: The Complete Feed Chart Explained
This is Athena's liquid retail line, Grow A+B, Bloom A+B, CaMg, PK, Balance, Cleanse, and Stack, distinct from the Athena Pro dry-powder line covered elsewhere. Here's when each product enters the schedule, in what order, and what it actually costs to run the full lineup.
The 30-Second Answer
- Grow A+B carries vegetative growth start to finish.
- Bloom A+B replaces Grow A+B at the flip to flowering, not alongside it.
- CaMg and Balance run throughout both stages as steady supplements.
- PK layers in during flowering for bud development.
- Cleanse comes in for the pre-harvest flush; Stack is an optional terpene/quality additive for growers chasing extra polish.
We stock the complete Blended Line and can help you dial in the switch points for your specific strain and cycle length.
Vegetative stage: Grow A+B, CaMg, and Balance
Grow A+B forms the complete vegetative base, ramping from a lighter dose for young plants to full strength as they mature. CaMg and Balance run alongside from early vegetative growth through to harvest, essentially unchanged across both stages, covering calcium, magnesium, and broader micronutrient support that the A+B base alone doesn't fully carry.
The flip: Bloom A+B replaces Grow A+B
At the switch to flowering, Bloom A+B takes over as the base, and Grow A+B stops entirely, this is a full replacement, not an addition. Running both together past the flip is the single most common mistake we see with this line, since it over-delivers nitrogen right when the plant's nutritional needs are shifting toward phosphorus and potassium for bud development. PK joins the schedule at the same point, layering on top of Bloom A+B specifically for that flowering-stage push.
Final stretch: Cleanse, and the optional Stack
Cleanse enters the schedule in the final one to two weeks before harvest, a flush product designed to clear built-up mineral salts from the media ahead of drying and curing. Stack is a separate, optional additive some growers layer in during flowering for extra terpene and quality development; it's not part of the core required schedule the way Grow/Bloom, CaMg, Balance, and PK are, more a polish step for growers specifically chasing that extra edge.
Full line pricing, 1-gallon and 5-gallon
| Product | 1 Gallon | 5 Gallon |
|---|---|---|
| Grow A+B Combo | $44.25 | $196.65 |
| Bloom A+B Combo | $44.25 | $196.65 |
| CaMg | $22.13 | $98.33 |
| PK | $22.13 | $98.33 |
| Balance | $22.13 | $98.33 |
| Cleanse | $21.43 | $91.87 |
| Stack | $172.07 | $786.60 |
Worth noting: Grow A+B and Bloom A+B are each sold as a single combo listing, one price covers both parts, rather than two separate purchases the way some competing brands structure their base nutrients.
Scaling doses to your actual container size
The 1-gallon and 5-gallon sizes here refer to the product bottle, not a fixed dose per plant, actual application rates scale with your reservoir or feeding water volume rather than your container count. A grower running a handful of small containers on hand-watering will get meaningfully more mileage out of a single gallon bottle than someone running a larger recirculating system feeding many gallons per session. This is worth factoring in before deciding between 1-gallon and 5-gallon sizing, smaller operations often don't need the 5-gallon jump even on products they're using every single feeding, since the per-feeding draw is small relative to the bottle.
Common mistakes with this schedule
The Grow-to-Bloom overlap covered above is the big one, but a second common error is treating Balance and CaMg as optional add-ons rather than the steady, continuous supplements they're designed to be; skipping them doesn't just leave out a boost, it can leave real gaps in calcium, magnesium, and micronutrient coverage that the A+B base alone doesn't fully cover. A third is starting Cleanse too early, running it for the full final month instead of the intended one to two weeks, which cuts into the plant's actual feeding window unnecessarily.
What We'd Tell You at the Counter
If you brought us this exact question at the counter, the first thing we'd flag is the Grow-to-Bloom switch, since that's genuinely the detail most growers get wrong with this line. Past that, CaMg and Balance are the steady background work; PK and Cleanse are timing-specific; Stack is optional polish, not a requirement.
We sell the full line and would rather make sure you've got the switch timing right than sell you Stack before you need it. We don't upsell.
Frequently asked questions
Can I run Grow A+B and Bloom A+B together during the transition?
Not recommended. Bloom A+B is designed to fully replace Grow A+B at the flip; running both together over-delivers nitrogen right when the plant's needs are shifting toward phosphorus and potassium.
Is Stack required for good results?
No. Stack is an optional terpene and quality additive some growers layer in during flowering; the core schedule, Grow/Bloom, CaMg, Balance, and PK, doesn't require it.
What's the difference between Athena Blended Line and Athena Pro?
Blended Line is Athena's liquid retail line, covered here. Athena Pro is a separate dry-powder line marketed more toward commercial growers, with its own feed chart and dosing structure.
How long should I run Cleanse before harvest?
Typically the final one to two weeks. Running it longer cuts into the plant's actual feeding window without adding proportional benefit.
Why is Grow A+B sold as one combo instead of two separate bottles?
Athena packages Grow A+B and Bloom A+B as single combo listings, one price for both parts, which simplifies ordering compared to brands that require adding Part A and Part B separately.
Once your base schedule is set, silica is a common next addition; our silica supplements guide covers that decision across four brands. Because, as always, we don't upsell.
For informational and educational purposes only. This article is general horticultural guidance and is not medical, legal, or regulatory advice. Cannabis cultivation laws vary by country, state and locality, and growing cannabis may be illegal where you live. Always understand and comply with the laws and regulations that apply to you before growing any cannabis plant. Product names, pricing, and specifications reflect our current catalog and are subject to change; confirm current pricing and stock before ordering.