Athena Pro Bloom - 25lb

What It Is

Athena Pro Bloom is a water-soluble, dry-salt flowering fertilizer with a 0-12-24 NPK ratio. It delivers the elevated phosphorus and potassium levels that flowering plants require for bulk development and high-metabolic-activity support. The formula also contributes sulfur via potassium sulfate — a deliberate choice over potassium nitrate — alongside magnesium, iron (DTPA-chelated), and additional microelements.

The 25 lb bag is the commercial format. It is designed to be dissolved into a concentrated stock solution first — Athena explicitly discourages adding the dry powder directly to a reservoir — and then dosed into feed water through any standard injection system. At the correct stock concentration, Pro Bloom produces a clean, sediment-free solution that runs through drip, flood-and-drain, or recirculating systems without clogging emitters or building residue.

Who It's For

Pro Bloom is the flower-phase component of the Athena Pro Line — a dry-salt two-part base program built around Pro Core (the micronutrient and calcium-nitrogen backbone) and Pro Bloom (the P-K driver). It is the right fit for licensed cannabis and hemp cultivators running hydroponic, coco, or hybrid substrate systems where recipe precision and cost control are operational priorities.

Facilities already running automated fertigation — Dosatron, Netaflex, Rhythm, or comparable injection setups — will get the most out of the Pro Line format. The stock-concentrate workflow integrates cleanly with any dosing architecture that accepts a liquid feed input, and the dry starting format means bulk purchasing goes further per square foot of canopy than equivalent liquid programs.

Key Features

The use of potassium sulfate rather than potassium nitrate is a formulation decision with a practical rationale: sulfates support secondary metabolite production, including terpene and cannabinoid synthesis, without adding extra nitrogen load during flower when nitrogen demand is intentionally lower. This keeps the grower in control of the nitrogen fraction through Pro Core ratios rather than baking it into the bloom component.

The large-grind, 100% soluble particle format means no undissolved solids, no emitter blockage, and no sediment accumulation in reservoirs or stock tanks. Pro Bloom mixes fully at room temperature with adequate agitation and carries low heavy metal content. Weighing by mass (not volume) is required for accurate dosing — Athena's feed schedule is based on grams per gallon, not scoops, which is consistent with how a commercial operation should be running nutrient preparation regardless.

How It Fits a Commercial Build

Pro Bloom is used from the first day of the flowering phase through late bloom, swapping in where Pro Grow left off. The standard Pro Line ratio calls for 1 gram of Pro Bloom paired with 0.6 grams of Pro Core per dosing unit — that ratio holds the full macro and micro profile complete when the two are combined. Neither product is a standalone complete fertilizer; they are designed as a system.

For stock-tank preparation, Athena's protocol is to add up to 2.5 lb of Pro Bloom per gallon of water, agitate thoroughly until fully dissolved, then use that concentrate as the injection source. Pro Bloom and Pro Core must not be combined in dry or undiluted concentrate form — they must be dissolved separately before mixing into feed water. At the 25 lb scale, operators running multi-light rooms or multi-room facilities will find the bulk format significantly reduces per-gallon input cost compared to smaller retail sizes or liquid equivalents.