Zero-nitrogen liquid PK supplement built for high-demand mid-to-late flower.
Athena Blended PK (0-4-5) is a clean liquid phosphorus and potassium booster designed to supplement the Athena Blended Line's Bloom A+B base during the mid- to late-flowering phase — no nitrogen, no filler, no dry salts to weigh. Available in 1-gallon, 5-gallon, and 55-gallon formats for operations at any scale.
Athena Blended PK is a water-soluble liquid mineral bloom booster with an NPK of 0-4-5 — no nitrogen in the formula. It is formulated specifically as a complement to Athena's Bloom A+B base within the Blended Line, providing the additional phosphorus and potassium load that high-yielding flowering plants demand as they move into peak production.
The formula is built from mineral inputs including monopotassium phosphate, magnesium sulfate, and potassium sulfate. It is a clean-running liquid — sediment-free and compatible with all dosing and irrigation systems, including fine dripper heads and recirculating setups. Shake well before each use, as minor micro-particles can occasionally be visible without affecting mineral balance or system compatibility.
Athena Blended PK is a fit for licensed cannabis and hemp cultivation operations already running the Athena Blended Line who want a dedicated PK boost layer without adding complexity to their program. Because it is a single-purpose additive — zero nitrogen, measured PK — it gives head growers precise control over elemental loading in the flowering window without disturbing the base feed ratios.
Operations running coco, rockwool, peat-based soilless media, or recirculating/DWC hydroponic systems can all use this product. It is particularly useful in high-EC variable feeding programs where PK demand is dialed up independently from the Bloom A+B base in weeks 3 through finish — allowing growers to push flowering intensity without stacking unnecessary nitrogen.
Zero nitrogen. The 0-4-5 ratio means you are adding exclusively phosphorus and potassium — no N accumulation during a phase where excess nitrogen typically works against flowering density and finish quality.
Calibrated PK loading. Many PK boosters deliver overly aggressive phosphorus and potassium concentrations, which can suppress calcium and magnesium availability and create cascading deficiency problems mid-flower. Athena's formulation is intentionally moderated — enough to support peak production demand without knocking Ca/Mg out of the available range.
Sediment-free, system-compatible liquid. Runs clean through injectors, peristaltic dosing systems, fine dripper heads, and recirculating reservoirs. No clogging, no need to pre-dissolve. Compatible with all growing media including coco coir, rockwool, and peat.
Within the Athena Blended Line feed schedule, PK is introduced starting at week 3 of flower and dosed at 3–10 mL per gallon depending on plant demand, strain response, and target EC. It runs alongside Bloom A+B — not as a replacement for the base, but as an additive layer that increases available P and K as flowering weight and resin development peak.
The Blended Line's design philosophy is variable EC feeding: base nutrients set the foundation, and additives like PK and CaMg are kept separate so growers can adjust specific elemental inputs at distinct phases of the cycle rather than being locked into a fixed ratio. This approach gives commercial operators meaningful flexibility to dial in performance by strain or room without redesigning the whole program.
HSC supplies Athena Blended PK nationally to licensed cannabis and hemp operators. The 5-gallon and 55-gallon formats are the practical purchase for commercial-scale feed programs; the 1-gallon is typically used for trials or small supplemental runs. Request a quote for volume pricing through HSC's direct account.
| NPK Ratio | 0-4-5 |
| Product Type | Liquid mineral bloom booster |
| Line | Athena Blended Line |
| Application Rate | 3–10 mL per gallon of water |
| Start Week | Week 3 of flowering phase |
| Available Sizes | 1 gallon, 5 gallon, 55 gallon |
| System Compatibility | All irrigation systems including fine dripper heads and recirculating |
| Media Compatibility | Coco coir, rockwool, peat/soilless, soil, DWC/recirculating |
| Key Mineral Inputs | Monopotassium phosphate, potassium sulfate, magnesium sulfate |
| Nitrogen Content | Zero (0% N) |
It runs alongside Bloom A+B — it is an additive, not a base replacement. Continue using Bloom A and Bloom B at their scheduled rates and layer PK on top starting at week 3 of flower at 3–10 mL per gallon, adjusting within that range based on EC targets and plant response.
The 0-4-5 formulation is intentional. By week 3 of flower, nitrogen demand has dropped significantly and excess N at this stage tends to suppress flowering performance and complicate finish quality. Separating PK from N gives growers the ability to increase P and K loading without adding more nitrogen into the reservoir.
Athena positions PK as a Blended Line additive designed to complement Bloom A+B, but many operators run it alongside Pro Line base nutrients as well. Check Athena's published feed schedules for your specific program configuration and always verify compatibility by monitoring EC and runoff before full deployment.
This is the primary design consideration behind Athena's PK formulation. The product is calibrated specifically to avoid the aggressive P and K concentrations found in many bloom boosters that suppress Ca and Mg availability. Staying within the 3–10 mL/gal dose range and monitoring EC and plant response is the standard management practice.
Athena Blended PK is available through HSC in 1-gallon, 5-gallon, and 55-gallon formats. For most licensed commercial operations running the product through a full flower cycle across multiple rooms, the 5-gallon is the standard repeat order unit; the 55-gallon drum is the right format for large-scale facilities with centralized nutrient mixing. Request a quote and we'll confirm lead time and volume pricing.
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