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Athena Blended Bloom A

Two-part liquid flowering base — 275-gal tote format for high-volume commercial programs.

Athena Blended Bloom A (4-0-5) is the calcium-and-nitrogen-carrying half of Athena's two-part liquid flowering base, formulated with macronutrients and chelated micronutrients for consistent uptake across media types, water sources, and irrigation methods. The 275-gallon tote format is the correct buy for facilities running continuous flower cycles at scale.

4-0-5
NPK (Bloom A)
275 Gallon Tote
Container Size
2–15 mL / gallon
Dose Range
Sediment-Free Liquid
Form Factor

What Athena Blended Bloom A Is

Athena Blended Bloom A is Part A of a two-part liquid base nutrient for the flowering stage. Its NPK is 4-0-5 — nitrogen and potassium without phosphorus, which is intentionally held in Part B (Bloom B, 0.7-6-5) to prevent precipitation in concentrated form. The two-part split keeps calcium separated from sulfates and phosphates until both parts are diluted into the feed tank, at which point they combine into a complete, stable flowering solution.

Bloom A's nitrogen source is primarily calcium ammonium nitrate, which simultaneously delivers the calcium load the plant needs during flower. The formula also carries chelated micronutrients — Iron EDTA, Iron EDDHA, Zinc EDTA, Manganese EDTA, Sodium Molybdate, Sodium Borate, and Magnesium Nitrate — all in EDTA or EDDHA chelated form for reliable uptake across a broader pH band than unchelated salts allow.

This is a synthetic mineral formulation. No organics, no bio-stimulants, no filler. It is designed to be dosed by EC and adjusted by runoff data, not by intuition — which is why it pairs directly with Athena's published feed schedules and why commercial operations can run it at scale without batch-to-batch variation.

Who This Format Is For

The 275-gallon IBC tote is the volume tier that makes sense for licensed cultivation facilities running dedicated flower rooms, multi-light commercial bays, or continuous harvest schedules. At 2–15 mL per gallon of feed solution, a 275-gallon tote represents a substantial supply buffer — enough to eliminate the weekly reorder friction that comes with case-pack purchasing.

Facilities running Dosatron injection panels, inline proportioners, or automated fertigation controllers benefit most from this format. Bulk liquid pulls directly from the tote via a tap or pump without the labor of opening, measuring, and staging individual gallons. The tote format also reduces per-unit plastic waste compared to jug purchasing at equivalent volume.

Note: 275-gallon totes require freight/LTL delivery and appropriate receiving infrastructure (pallet jack or forklift access). Coordinate logistics through your HSC account before ordering. This format is not parcel-shippable.

Key Formulation Properties

Sediment-free and fully soluble under normal handling conditions. The formula is engineered to be compatible with fine dripper heads, drip emitters, recirculating DWC systems, run-to-waste drip, and flood-and-drain tables. Minor micro-particle visibility can occasionally occur under certain temperature or dilution conditions but does not affect mineral balance or system compatibility.

Compatible media include coco coir, rockwool, perlite/peat soilless mixes, and soil. The chelated micronutrient package maintains uptake stability across a practical operating pH range, which reduces the sensitivity margin you'd see with unchelated mineral programs — important when running RO water, high-volume fertigation, or operations where pH drift between irrigation events is difficult to eliminate entirely.

Always used in equal parts with Bloom B. Do not combine A and B in undiluted concentrate form — always dilute each into the main reservoir separately. Monitor EC after mixing and adjust feed strength based on crop stage and runoff readings. Athena's published Blended Line feed schedule provides week-by-week targets across the full flowering phase.

How Bloom A Fits a Commercial Nutrient Program

The Athena Blended Line is structured as a stage-specific two-part system: Grow A+B during vegetative, Bloom A+B during flower. There is no single 'base' used across both stages — the transition from Grow to Bloom is a full product swap, not a ratio adjustment. This keeps the nutrient profile stage-appropriate without requiring operators to manage multiple additive channels to compensate.

Bloom A+B is the core of the flowering program. Supplemental products in the Blended Line — CaMg for RO-water or coco grows, PK booster from week three of flower onward, Stack for early-flower transition support, Fade for the final finish window, and Balance for pH buffering — are layered on top of Bloom A+B as needed. None of them replace the base; they build on it.

Because the program uses EC as its primary control variable, it scales cleanly from smaller commercial builds to large multi-room facilities without reformulation. Operators who switch from the Blended Line to Athena's Pro Line dry concentrates will find the same nutrient philosophy and compatible feed schedules — the chemistry maps across both formats.

Specifications

ProductAthena Blended Bloom A
SKULQB-BLA-275G
NPK4-0-5
FormLiquid concentrate, sediment-free
Container Size275 Gallon IBC Tote
Application Rate2–15 mL per gallon of water (flowering phase)
Use StageFlowering (used equally with Bloom B)
Compatible SystemsDrip, DWC, recirculating, flood & drain, Dosatron, hand-watering
Compatible MediaCoco coir, rockwool, soilless/peat, soil
Key Ingredients (Bloom A)Calcium Ammonium Nitrate, Potassium Nitrate, Iron EDTA, Iron EDDHA, Zinc EDTA, Manganese EDTA, Sodium Molybdate, Sodium Borate, Magnesium Nitrate

Frequently Asked Questions

Do I need to buy Bloom B at the same time?

Yes. Bloom A and Bloom B are always used together in equal amounts. Bloom A (4-0-5) carries the nitrogen, calcium, and chelated micronutrients; Bloom B (0.7-6-5) carries phosphorus, potassium, and additional magnesium. Running only one part produces an incomplete and imbalanced nutrient solution. Order both in matched volume to avoid running one out before the other.

Can Bloom A be used in automated Dosatron or proportioner systems?

Yes. Athena Blended Bloom A is formulated to be compatible with Dosatron injectors and other mechanical proportioning systems. It is sediment-free and will not clog fine dripper heads or emitters under normal operating conditions. Athena publishes Dosatron panel configuration guides for the Blended Line on their support site.

Is this program compatible with coco and rockwool, or is it soil-specific?

Athena Blended Bloom A+B is compatible with rockwool, coco coir, soilless/peat-based media, recirculating DWC systems, and soil. Facilities running coco or RO water often add Athena CaMg to the program to supplement calcium and magnesium demand, which is higher in inert media and stripped water sources.

How does the Blended Line compare to Athena's Pro Line for a commercial facility?

The Pro Line uses dry water-soluble concentrates (Pro Grow, Pro Bloom, Pro Core), which carry a lower cost-per-gallon-of-feed-solution at high volume but require accurate weighing and dissolution. The Blended Line is a pre-mixed liquid format — no weighing, faster mixing, appropriate for operations that prioritize consistency and handling speed over minimum input cost. Both share the same nutrient philosophy and compatible EC-based dosing approach.

What is the correct mixing order when building a reservoir?

Per Athena's best practices: start with water, then add Balance (if used), then add Bloom A, then add Bloom B — diluting each into the main reservoir before adding the next. Never combine A and B in undiluted concentrate form, as this can cause precipitation. Adjust pH after all products are mixed and EC is confirmed.

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