Dry-soluble phosphatase + mannanase enzyme biostimulant — 0.4 g/gal dose, 28,375 gallons per bag.
Front Row Ag PhosZyme is a concentrated dry-soluble enzyme biostimulant combining mannanase, phosphatase, and mono ammonium phosphate to increase phosphorus bioavailability, improve water uptake, and accelerate root development across all growth stages. The 25 lb commercial bag covers 28,375 gallons of feed solution at the standard 0.4 g/gal dose.
Front Row Ag PhosZyme is a concentrated dry-soluble biostimulant built around two enzyme classes — mannanase and phosphatase — paired with mono ammonium phosphate (MAP). It is designed for professional cultivation environments where measurable nutrient efficiency and repeatable input costs matter. The formulation ships as a fine powder that dissolves fully into solution, making it compatible with stock-concentrate injection systems and direct-to-reservoir programs alike.
Mannanase targets the starches that the plant rhizosphere exudes to drive water into the xylem. By breaking down those starches, it increases osmotic potential and enhances water uptake. The byproduct sugars return to the root zone, supporting root growth and stimulating microbial activity. Phosphatase works on a separate mechanism: it catalyzes the conversion of bound phosphorus — phosphorus locked to cations in the substrate — into plant-available forms, without requiring additional microbial intermediaries. The MAP component delivers a targeted nitrogen-and-phosphorus boost that supports amino acid synthesis and tissue development.
PhosZyme is built for licensed cannabis and hemp cultivators running high-intensity CEA programs where substrate phosphorus lock-up and inconsistent water distribution are measurable drag on yield. It performs across hydroponic, coco, and soilless media systems. Operators already using the Front Row Ag A/B/Bloom three-part system will find PhosZyme integrates directly: it is mixed into the Part B stock tank at 10% of the carrier's weight, keeping the applied dose at or near the 0.4 g/gal target throughout the feed program. It is not calcium-compatible and must never be combined with the Part A stock tank.
The 25 lb bag size is sized for commercial-scale operations. At 0.4 g/gal, a single bag treats approximately 28,375 gallons of feed solution — meaningful volume for multi-room licensed facilities running continuous harvest cycles. Smaller operations or trial programs can start with the 5 lb size (5,675 gallons per bag) before committing to the commercial format.
The two-enzyme approach addresses phosphorus availability and water transport simultaneously — two variables that typically require separate interventions. Phosphatase frees phosphorus that is bound to cations in the substrate, weakening the ionic bonds and rendering previously inaccessible fertilizer immediately plant bioavailable. This reduces wasted input cost from locked-up P and allows the nutrient program to hit effective phosphorus levels at lower total application rates.
Mannanase increases the osmotic efficiency of water movement into the xylem, which translates to improved nutrient transport throughout the plant. As more plant-available sugars are released back to the root zone, microbial populations in the rhizosphere are supported, creating a secondary benefit even in inert substrates. The MAP component ensures a direct and immediate source of nitrogen and phosphorus is available while the enzymatic activity is establishing. Together, these mechanisms have shown results including enhanced root development, improved fertilizer efficiency, and — in commercial hydroponic settings — customer-reported yield improvements when added to an established nutrient program.
PhosZyme is compatible with stock-concentrate fertigation systems running dosers or injectors. Front Row Ag recommends adding it directly to the Part B stock tank rather than maintaining a dedicated PhosZyme tank — this eliminates the need for a separate injector and frees space in the fertigation panel. In a 3-doser setup, it rides with Part B throughout the crop cycle. In a 2-doser setup, it goes into the combined Part B + Bloom tank.
Because PhosZyme contributes to total EC, the feed calculator at Front Row Ag's resources page automatically adjusts all other component dosages downward when PhosZyme is enabled, so the target EC remains accurate. Growers should reference the current Front Row Ag feed chart for their specific growth phase and system configuration. PhosZyme is available through HSC nationwide — contact us to request a quote for single-bag or multi-bag commercial orders.
| SKU | FRPHZM025 |
| Brand | Front Row Ag |
| Net Weight | 25 lb (11.34 kg) |
| Formulation | Dry soluble powder |
| Active Enzymes | Mannanase, Phosphatase |
| Additional Input | Mono ammonium phosphate (MAP) |
| Application Rate | 0.4 g/gal |
| Coverage (25 lb bag) | ~28,375 gallons of feed solution |
| Stock Tank Compatibility | Part B tank only — not calcium-compatible; never combine with Part A |
| Available Sizes | 5 lb, 25 lb |
Adding more phosphorus to your feed doesn't recover the P that's already locked to cations in your substrate. PhosZyme's phosphatase enzyme breaks those ionic bonds, making previously inaccessible phosphorus immediately plant-bioavailable. That means you get more output from the fertilizer inputs you're already running, rather than just stacking more raw nutrient on top. The mannanase enzyme addresses a separate problem — water transport efficiency — which is not addressed by phosphorus additions at all.
PhosZyme can be integrated into other professional nutrient programs, but compatibility should be verified before combining it in a stock tank. The critical constraint is calcium incompatibility: PhosZyme must never be mixed in the same tank as a calcium-containing fertilizer (such as a typical Part A or CalMag product). Always add it to a calcium-free carrier tank. Refer to Front Row Ag's resources page and feed chart for integration guidance.
At the standard 0.4 g/gal dose, a 25 lb bag covers approximately 28,375 gallons of feed solution. How long that lasts depends entirely on your irrigation volume. A facility pushing 1,000 gallons of feed per day would run through a bag in roughly 28 days; a facility running 500 gallons per day would see approximately 56 days of use per bag.
Not if you're running the Front Row Ag system. Front Row Ag's current recommendation is to dissolve PhosZyme directly into the Part B stock tank at 10% of the carrier's weight (e.g., 5 lb per 50 lb tank). This eliminates the need for a separate injector and simplifies your fertigation panel. If you are running a 2-doser setup, it goes into the combined Part B + Bloom tank.
PhosZyme is a fully soluble dry powder that dissolves into stock solution before delivery to the crop. It is compatible with drip irrigation, flood-and-drain, and NFT systems provided it is correctly dissolved in a calcium-free stock tank. Avoid mixing it with Part A or any calcium-containing concentrate. Consult Front Row Ag's feed calculator to confirm dosing for your specific system configuration.
Get operator-direct pricing and availability. We supply licensed commercial cultivators nationwide.
Request a Quote