Zero-nitrogen PK supplement for peak flowering demand — week 3 through late bloom.
Athena Blended PK (0-4-5) is a clean liquid phosphorus and potassium booster formulated to layer over the Blended Line Bloom A+B base during the mid-to-late flowering phase — delivering additional P and K exactly when high-yielding plants need them most, without adding nitrogen or disrupting calcium and magnesium availability.
Athena Blended PK is a 0-4-5 liquid mineral bloom supplement — no nitrogen, no organic matter, no enzymes or microbes — designed to sit alongside the Athena Blended Bloom A+B base as a targeted phosphorus and potassium top-up from week 3 of flower through late bloom. The formulation is built around mineral inputs including monopotassium phosphate, magnesium sulfate, and potassium sulfate.
It is part of the Athena Blended Line, a liquid two-part system — Grow A+B for veg, Bloom A+B for flower — that removes dry-salt weighing from the feed workflow while maintaining the same EC-based dosing philosophy as the Pro Line. PK slots in as an additive layer on top of the base; it does not replace Bloom A or B.
Athena Ag manufactures its full nutrient catalog in-house at its Los Angeles, California facility under ISO 9001 quality management, with formulations developed alongside and validated in large-scale commercial production environments.
Any commercial cannabis or hemp operator running the Athena Blended Line program who wants to push PK availability higher during peak flowering weeks without increasing total nitrogen load. That's the practical use case: when your Bloom A+B EC is dialed where you want it but the crop is in its heaviest flower-set window and you want to tilt the elemental profile toward P and K.
It also fits licensed operators who run variable EC feeding — raising nutrient concentration during peak demand phases — and need a dedicated PK input that can be scaled independently of the base feed rate. Because PK and CaMg are separated from the Blended Line base nutrients, you have room to adjust each component without reformulating the whole tank.
The clean liquid format runs through all standard dosing and irrigation system types, including fine dripper heads, with no sediment under normal storage conditions. That makes it compatible across rockwool, coco, peat-based soilless, DWC/recirculating, and soil programs without modification.
The most common failure mode with PK boosters at commercial scale is overloading phosphorus and potassium to a point where calcium and magnesium antagonism begins — P-K competition with Ca and Mg at the root zone reduces availability of both and can produce deficiency symptoms mid-flower even with adequate Ca and Mg in solution. Athena engineered PK's 0-4-5 profile specifically to deliver a meaningful boost to both elements without triggering that cascade.
Balanced elemental bioavailability during the flowering phase supports essential oil and terpene production alongside structural flower development. At a 3–10 mL/gal dose range, operators have enough headroom to calibrate based on cultivar, media, and water chemistry without blowing past safe uptake thresholds.
Store sealed in original packaging between 45 °F and 85 °F. Shake well before each use — small amounts of micro-particles may occasionally be visible under certain conditions but do not affect mineral balance or system compatibility. Use clean measuring instruments and do not introduce anything back into the container. Adjust solution pH to target range after mixing all nutrients and additives.
In a standard Athena Blended Line program, PK enters the feed schedule at week 3 of flower and runs through late bloom alongside Bloom A+B. It pairs with CaMg when growing in RO water or inert media such as rockwool or coco, where baseline calcium and magnesium are not present in the source water. Athena's published Blended Line feed schedule — available in both standard and metric formats — gives week-by-week dosing targets, EC ranges, and mixing order for the full stack.
For larger commercial operations, Athena Blended PK is available in 5-gallon jugs and 55-gallon drums in addition to the 1-gallon unit. HSC can coordinate bulk drum supply for multi-room facilities running continuous harvest cycles where a 1-gal cadence creates unnecessary reorder friction. Ask us about bulk sizing and lead times when you request a quote.
Hydro Supply Co. carries the full Athena Blended Line catalog — PK, Bloom A+B, Grow A+B, CaMg, Cleanse, Balance, Fade, and Stack — so operators can consolidate purchasing and feed schedule sourcing through a single account. Wholesale pricing is available to licensed cultivators nationwide.
| Brand | Athena Ag |
| Product Line | Blended Line |
| SKU (HSC) | LQ-PK-1G |
| NPK Ratio | 0-4-5 |
| Formula Type | Liquid mineral concentrate |
| Application Stage | Mid- to late-flowering (week 3 through late bloom) |
| Dose Rate | 3–10 mL per gallon of water |
| Available Sizes | 1 gallon, 5 gallon, 55 gallon |
| Storage Temperature | 45 °F – 85 °F (sealed, original packaging) |
| System Compatibility | Hydro, coco, rockwool, peat/soilless, soil; compatible with fine dripper heads and dosing systems |
It runs alongside them. PK is an additive layer — it does not replace Bloom A or B. Per the Athena Blended Line feed schedule, you continue running Bloom A+B as your base through the flowering phase and add PK starting at week 3 to increase phosphorus and potassium supply above what the base provides. Always follow Athena's published feed schedule for mixing order and EC targets.
High-analysis PK boosters concentrate P and K to levels that can create antagonism with calcium and magnesium at the root zone, reducing Ca and Mg availability mid-flower even when those elements are present in solution. Athena formulated PK at 0-4-5 to deliver a meaningful bloom-phase boost without triggering that cascade, keeping the full elemental profile in balance through late flower.
Yes. The liquid formula is compatible with rockwool, coco, peat-based soilless, DWC and recirculating hydro, and soil. It runs through all standard dosing and irrigation systems, including fine dripper heads, and is described as sediment-free under normal storage conditions.
Yes. Athena's guidance is to add all nutrients and additives first, then adjust pH to your target range after the full solution is mixed. Add PK after your base nutrients in the mixing order; consult Athena's published Blended Line feed schedule for the specific mixing sequence.
Yes. HSC carries Athena Blended PK in 1-gallon, 5-gallon, and 55-gallon drum sizes. For multi-room or high-volume operations, request a quote and ask about bulk drum availability and lead times for your facility's consumption rate.
Get operator-direct pricing and availability. We supply licensed commercial cultivators nationwide.
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