Front Row Ag · Feed Calculator
Stock concentrate mixing rates & feed schedules
Configuration
Stock Concentrate is the standard commercial setup. Fertilizer is pre-mixed into concentrated stock tanks, then injected into the irrigation line by dosing equipment (injectors). The calculator shows how much product to add to each stock tank and the injection rates for your dosers.
Direct to Reservoir is for facilities that mix nutrients directly into a reservoir or batch tank at working strength — no stock tanks or injectors involved. The calculator shows how much product to add per gallon (or per liter) of final solution.
3:2:2 is the standard mixing method. Three 25-pound bags of Part A go into a 50-gallon stock tank (75 lbs total at 1.5 lbs/gal). Part B and Bloom each get two 25-pound bags into 50 gallons (50 lbs each at 1 lb/gal). Because Part A is more concentrated, the injection rates come out equal across all three parts — which simplifies day-to-day dosing.
1:1:1 means everything is mixed at 1 pound per gallon — 50 pounds of each part into 50-gallon stock tanks. This is a lower concentration than 3:2:2 and is used by facilities that prefer a uniform weight ratio. Injection rates will differ between parts since each contributes a different share of the total EC.
3-Doser: Three separate stock tanks — Part A, Part B, and Bloom each get their own injector. This is the standard setup and allows full flexibility with per-phase recipe adjustments.
2-Doser: Two stock tanks — Part A in one, and Part B + Bloom combined in the other. Used in facilities with only two injectors. Locks all phases to the Stack recipe since the B-to-Bloom ratio is fixed in a single tank.
PhosZyme is added to the Part B stock tank (or the combined B + Bloom tank in 2-doser mode). It contains phosphorus-digesting enzymes that improve nutrient availability. When enabled, the calculator automatically scales all dosages down slightly so the total EC — including PhosZyme's contribution — still hits your target. Most facilities include PhosZyme by default.
Si is a silica supplement used as a foliar spray at 0.5–2 mL/gal, once weekly, from veg through week 3 of flower.
pH Up is used as needed to raise pH into the 5.5–6.0 target range. Maximum 0.2 g/gal total in the mix. Always add last, after all nutrients are mixed, and allow 5–15 minutes of reaction time before re-measuring.
BioFlo is a bioenzymatic line cleaner that removes biofilm from irrigation lines, maintaining consistent flow and even nutrient delivery. Not a feed additive — used as a periodic soak between or during cycles.
Triologic is a microbial inoculant containing Mycorrhization Helper Bacteria. It amplifies mycorrhizal colonization when applied as a weekly hand-water drench alongside a separate mycorrhizal inoculant.
Feed Schedule
| Phase | Veg / Moms | Wk 1–2 | Wk 3–4 | Wk 5–7 | Final Wks |
|---|---|---|---|---|---|
| Recipe | |||||
| Target EC |
Tip: Choose "Save as PDF" in the print dialog to download a clean one-page PDF.
Supplemental Products
▾Stock Concentrate Rates
| Validation | |||||||
|---|---|---|---|---|---|---|---|
| Tank | Part | gal | lbs | lbs/gal | mL / 5gal | EC/g/gal | Valid. EC |
* When mixed with Part B stock solution, PhosZyme will increase the validation EC.