55-gallon drum of Athena's liquid vegetative base — Part B of the Blended Grow A+B programme.
Athena Blended Grow B (NPK 1-3-5) is the phosphorus- and potassium-rich counterpart to Grow A in Athena's two-part liquid vegetative system. The 55-gallon drum format is sized for commercial operations running Dosatrons, stock tanks, or high-volume reservoir fills without constant reordering.
Athena Blended Grow B is a concentrated liquid mineral nutrient — NPK 1-3-5 — formulated as Part B of Athena's two-part vegetative base programme. It pairs exclusively with Grow A (NPK 4-0-1), and the two parts must always be used in equal volumes to maintain proper mineral ratios. The reason for the two-bottle format is chemistry: keeping calcium (in Part A) physically separated from sulfates and phosphates (concentrated in Part B) prevents precipitation in the bottle while delivering a complete, balanced profile once both parts are diluted into the reservoir.
Grow B supplies the phosphorus and potassium backbone of the vegetative feed, supporting photosynthesis, energy transfer, respiration, and robust stalk and root development. The formula is fully liquid — no dry salts to weigh, no mixing equipment required — which makes it straightforward to integrate into automated injection systems, Dosatrons, and hand-watered programmes alike.
The 55-gallon drum SKU (LQB-GWB-55G) is the commercial format — it is not a hobbyist size. It is the right choice for licensed indoor cannabis and hemp operations that run a dedicated vegetative room or zone, have Dosatron or peristaltic injectors already plumbed, and want to reduce the frequency of nutrient orders. A multi-light veg room or a multi-tier propagation/veg setup moving significant canopy will cycle through this volume within a normal run.
The Athena Blended Line overall sits between Athena's Pro Line dry concentrates and a traditional multi-bottle additive stack. It is the correct choice when liquid handling is preferred over powder mixing — for example, facilities without dry-mix infrastructure, teams that run rolling shifts, or operations that have standardized on liquid concentrates for dosing accuracy and ease of QC. If you are already running the Athena programme on a smaller scale and scaling up your facility, the 55-gallon drum is the logical volume step before moving to Pro Line dry.
Grow B's guaranteed analysis is 1-3-5 (Total Nitrogen 1%, Available Phosphate 3%, Soluble Potash 5%). Its active mineral inputs include Monopotassium Phosphate, Potassium Nitrate, Monoammonium Phosphate, Magnesium Sulfate, and Copper EDTA — a clean mineral salt and chelated micronutrient stack with no organic filler.
The formula is sediment-free and fully compatible with fine dripper heads, emitters, and recirculating systems. Athena notes that small amounts of micro-particles can occasionally be visible under certain conditions but will not affect the mineral balance or system compatibility. Storage temperature range is 45°F–85°F in the original sealed container. Do not combine Grow A and Grow B in undiluted form — always dilute each part separately into the bulk water volume first, then combine. Adjust pH after all nutrients and additives are mixed.
Athena publishes a week-by-week Blended Line feed schedule covering Propagation, Veg, Flower, and Finish phases across a 13-week programme, with EC and pH targets for each week and mixing order guidance. Grow B is active through the propagation and full vegetative phases alongside Grow A. As plants transition to flower, Grow A+B is replaced by Bloom A+B — same equal-parts discipline, same dosing infrastructure.
At the 55-gallon scale, the drum integrates cleanly with a Dosatron or peristaltic injector drawing from a drum with a dip tube or drum pump. Running both Grow A and Grow B drums simultaneously at matched draw rates is the standard approach for equal-parts compliance. Pair with Athena CaMg when running RO water or inert media (coco, rockwool) where calcium and magnesium supplementation is needed. Athena Cleanse can be added on a scheduled basis to maintain emitter and line cleanliness across the veg zone.
| SKU | LQB-GWB-55G |
| Brand | Athena |
| Product Line | Blended Line |
| NPK | 1-3-5 |
| Container Size | 55 Gallon Drum |
| Application Stage | Vegetative (Propagation through end of Veg) |
| Dose Rate | 2–5 mL per gallon of water (equal parts with Grow A) |
| Key Ingredients | Monopotassium Phosphate, Potassium Nitrate, Monoammonium Phosphate, Magnesium Sulfate, Copper EDTA |
| System Compatibility | Recirculating, DWC, drip, Dosatron, hand-water; all media |
| Storage Temperature | 45°F – 85°F, sealed in original container |
No. Grow A and Grow B are a paired system designed to always be used in equal volumes. Grow A carries the calcium and the primary nitrogen load (NPK 4-0-1); Grow B carries the phosphorus, potassium, and supporting minerals (NPK 1-3-5). Running either part alone leaves the feed profile incomplete and unbalanced. The two-bottle format exists specifically to keep incompatible concentrated minerals separated until they are diluted into the reservoir.
Athena Blended Grow B is compatible with all common commercial substrates — coco coir, rockwool, peat/soilless mixes, and soil — and all irrigation methods including recirculating/DWC, drip drain-to-waste, Dosatron injection, and hand-watering. The formula is sediment-free and rated for fine dripper heads and emitters.
When running reverse osmosis water or inert media such as rockwool or coco coir, a CaMg supplement is typically required to meet plant calcium and magnesium demand that the base two-part alone may not fully cover at all EC levels. Athena publishes feed schedule guidance that accounts for CaMg dosing — refer to those charts and your own runoff and tissue data to dial in your specific facility.
Same core nutrient chemistry, different format. The Blended Line is pre-mixed liquid concentrate — no weighing or powder handling, faster setup, liquid-injection ready. The Pro Line is a dry water-soluble concentrate that must be mixed into solution — lower cost per unit volume at scale, ideal for large stock-tank operations. Most high-volume commercial facilities run Pro Line; operations that prefer liquid handling or have existing liquid injection infrastructure run Blended Line.
A drum pump or dip tube fitted to the bung draws concentrate from the drum directly into the Dosatron or peristaltic injector suction line. Run a dedicated injector for Grow A and a second for Grow B, set to equal draw ratios, injecting into your main water line ahead of the distribution manifold. Always verify your final reservoir EC and pH after injection and before irrigating. Do not combine the undiluted concentrates directly — each must be diluted into the water stream before contact with the other.
Get operator-direct pricing and availability. We supply licensed commercial cultivators nationwide.
Request a Quote