Zero-nitrogen PK supplement built for peak flowering demand — 275-gal tote format.
Athena Blended PK (0-4-5) is a clean liquid phosphorus and potassium bloom supplement formulated for mid- to late-flowering supplementation in licensed cannabis and hemp production. Mineral-only, nitrogen-free, and fully compatible with automated fertigation — available in 275-gallon tote format for high-volume operations.
Athena Blended PK is a liquid mineral bloom supplement with a 0-4-5 NPK profile — zero nitrogen, 4% available phosphate (P₂O₅), and 5% soluble potash (K₂O). It's a standalone additive within the Athena Blended Line, formulated to layer on top of Bloom A and Bloom B during the mid- to late-flowering window when plants are pulling hard on phosphorus and potassium.
The formula is derived from mineral salts — primarily monopotassium phosphate, potassium sulfate, and magnesium sulfate — with no organic material, no sediment, and no carbonates that could foul lines. The result is a fully soluble, system-safe liquid that integrates cleanly into existing fertigation stacks without requiring chemistry changes to the base Bloom program.
The 275-gallon tote format (SKU: LQB-PK-275G) is the commercial-scale offering — appropriate for licensed indoor facilities and greenhouses where per-gallon nutrient cost and storage footprint both matter.
Athena Blended PK at the 275-gallon scale is sized for licensed cannabis operators already running the Athena Blended Line — or any commercial team that wants a controlled, nitrogen-free PK additive they can dial in independently of their base nutrient EC.
The Blended Line's architecture keeps CaMg and PK as separate additives precisely so cultivators can adjust peak-demand nutrients without moving the entire EC target. That approach suits variable-EC programs common in high-density canopy production, where flower sites are at different maturity stages across a multi-light room.
If your facility runs automated dosing through Dosatron, Netafim, or a similar system, Athena Blended PK's mineral-only, sediment-free formula is designed to run through venturis, dosers, and peristaltic pumps without clogging or residue buildup. Operations still on hand-watering SOPs will find the concentrated liquid straightforward to measure and deploy.
Zero nitrogen means you can push PK supplementation in weeks 3 through harvest without compounding nitrogen load — an important control in late-stage programs where excess N delays ripening or suppresses terpene expression. The 0-4-5 ratio is intentionally moderate: Athena's position is that overloading PK creates antagonism with calcium and magnesium, reducing their availability at exactly the moment high-density flowers need them most.
The formula also carries 0.96% water-soluble magnesium and 1.5% combined sulfur — secondary elements that ride alongside the PK without requiring a separate additive. Magnesium supports chlorophyll function through the finish, while sulfate sulfur contributes to amino acid synthesis, relevant to cannabinoid and terpene precursor pathways.
Full system compatibility is confirmed for NFT, aeroponic, drip, recirculating DWC, rockwool, coco coir, and soil-based media. The mineral-only formula is 100% soluble, safe for fine dripper heads, and will not introduce organic sediment into reservoir or drip line infrastructure.
Within the Athena Blended Line, PK is used alongside Bloom A and Bloom B starting at week 3 of the flowering phase and continues through the final weeks before harvest. The standard Blended Line feed schedule specifies 3–10 mL per gallon depending on cultivar, growth stage, and target EC — the range accommodates conservative and aggressive feeding strategies without reformulation.
At 275 gallons, this tote format supports large reservoir fills and high-frequency fertigation runs without constant replenishment. For facilities batching large nutrient tanks daily or maintaining inline dosing systems, tote-scale purchasing reduces per-gallon cost and storage handling compared to 5- or 55-gallon containers.
Best practice per Athena: shake well before each use, use clean measuring instruments, and monitor EC after addition to confirm you're hitting your target range for the crop stage. Adjust total PK dose based on runoff EC feedback and visual plant response — the formulation is consistent enough to serve as a reliable EC-calibration reference point across batches.
| NPK | 0-4-5 |
| Available Phosphate (P₂O₅) | 4% |
| Soluble Potash (K₂O) | 5% |
| Water-Soluble Magnesium (Mg) | 0.96% |
| Combined Sulfur (S) | 1.5% |
| Nitrogen (N) | 0% |
| Derived From | Monopotassium phosphate, potassium sulfate, magnesium sulfate |
| Formula Type | Mineral-only liquid; sediment-free, 100% soluble |
| Application Rate | 3–10 mL per gallon; begin week 3 of flower |
| Container Size (this SKU) | 275-gallon tote (LQB-PK-275G) |
| System Compatibility | Drip, NFT, aeroponic, DWC, Dosatron, hand-water; rockwool, coco, soil |
| Storage Temperature | 45°F – 85°F (closed, original container) |
The formula itself is a standalone mineral additive — monopotassium phosphate, potassium sulfate, and magnesium sulfate in solution. It's compatible with other nutrient programs as a PK supplement, though Athena's published feed schedules and EC targets are built around using it alongside Bloom A and Bloom B. If you're stacking it with another base, dial in your total EC and watch for Ca/Mg antagonism, which is possible when any PK booster is pushed high.
The range accounts for cultivar differences, water hardness, media type, and stage of flower. Earlier in the bloom window (weeks 3–5), most programs sit at the lower end and ramp toward the higher end as sites stack. Let your EC target and runoff EC guide the dose — if runoff EC is creeping above target, back off. Athena's published Blended Line feed schedules provide week-by-week starting points.
Yes. Athena Blended PK is a mineral-only, 100% soluble formula with no sediment or organic material. It's confirmed compatible with venturis, dosers, and peristaltic pumps — including fine dripper heads. No clogging risk from the product itself; standard line maintenance practices still apply.
No — PK is an additive layer on top of Bloom A and B, not a replacement. Bloom A (4-0-5) and Bloom B (0.7-6-5) supply the full macro and chelated micro profile. PK's role is to provide additional phosphorus and potassium on top of that base during peak flowering demand. The Athena Blended Line is designed so you run equal parts A and B throughout flower, then add PK starting at week 3.
Add PK to your reservoir after your base nutrients are diluted in water, then adjust pH as a final step after all additives are mixed. Athena's best practice: monitor EC after each addition, then pH-adjust the final solution to the appropriate range for your media (typically 5.8–6.2 for coco/rockwool, 6.0–6.5 for soil). Do not mix concentrates together directly.
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