1-4-7 NPK liquid bloom base — full micronutrient profile, minimal salt build-up, compatible with hydro, soil, and soilless.
TechnaFlora B.C. Bloom is a highly concentrated liquid bloom-stage base nutrient with a 1-4-7 (N-P-K) guaranteed analysis, formulated to drive flowering development and reproductive growth when paired with B.C. Boost. The 4L format is the practical mid-run size for commercial operations running multi-table or multi-room programs.
TechnaFlora B.C. Bloom is the flowering-stage component of TechnaFlora's B.C. Hydroponic Nutrients three-part system — a line that has been in commercial production for decades. The 1-4-7 NPK ratio is weighted toward phosphate and potassium to support the reproductive and structural demands of the flower cycle. The formulation delivers 1.0% total nitrogen (all nitrate), 4.0% available phosphate (P₂O₅), and 7.0% soluble potash (K₂O), alongside a full secondary and micronutrient panel that includes magnesium, sulfur, boron, copper, manganese, molybdenum, and zinc.
Unlike formulations that relegate micronutrients to a single part of a three-part system, B.C. Bloom carries its own complete micronutrient load — so your plants are not entirely dependent on B.C. Boost for trace element delivery during flower. That architecture gives operators more flexibility when dialing in custom feed rates mid-cycle.
Licensed cannabis and hemp cultivation operations running hydroponic, coco, or soil-based programs. B.C. Bloom is medium-agnostic — it is formulated for use across recirculating hydro systems (NFT, DWC, flood-and-drain), coco coir, and amended or unamended soil runs. The 4L format suits multi-table rooms and smaller multi-site programs where a 1L runs out too quickly but a 10L or 20L would tie up capital before it gets used.
The system is also well-suited for cultivation teams that want a structured, stage-based feed program rather than a week-by-week matrix. B.C. Bloom is paired with B.C. Boost at a 1:1 ratio during flower, and the stage-to-stage logic of the TechnaFlora Recipe for Success program reduces the interpretive burden on grow staff — relevant for any operation managing multiple employees across shifts.
Nitrate-only nitrogen source: all 1.0% of the nitrogen in B.C. Bloom is delivered as nitrate nitrogen — there is no ammoniacal or urea nitrogen. This matters in the bloom phase because nitrate-form N is less likely to push excessive vegetative growth and is generally preferred in recirculating systems for pH stability reasons.
The formulation is engineered to minimize pH drift without relying solely on buffering agents — TechnaFlora describes the approach as formulated-to-pH rather than buffered-to-pH. Operators running systems that historically require constant pH correction have reported more stable reservoir readings with the B.C. line. Low salt accumulation is also a documented characteristic of the formula, reducing the frequency and cost of full system flushes. Ingredients include potassium nitrate, magnesium sulfate, monopotassium phosphate, potassium sulfate, manganese sulfate, boric acid, zinc sulfate, copper sulfate, and sodium molybdate.
B.C. Bloom is used exclusively during the flowering stage, dosed at 1 tsp (approximately 5 mL) per gallon of water, always paired with B.C. Boost added first. This makes reservoir preparation consistent and repeatable across grow staff — a real operational benefit in commercial facilities with multiple staff members prepping feeds. TechnaFlora recommends maintaining solution pH between 5.5 and 6.5 for best results.
For operations already running the full B.C. Hydroponic Nutrients system, the 4L size of B.C. Bloom balances purchasing frequency against storage footprint. For facilities scaling up or evaluating a new base nutrient line, the 4L is a practical trial size before committing to 10L, 20L, or larger drum formats that TechnaFlora also offers. Hydro Supply Co. supplies the full TechnaFlora catalog nationally — request a quote for single-unit or case-quantity pricing.
| Product | TechnaFlora B.C. Bloom |
| SKU | TF-BLOOM-4L |
| Container Size | 4 Liters |
| NPK (Guaranteed Analysis) | 1-4-7 |
| Total Nitrogen (N) | 1.0% (100% Nitrate Nitrogen) |
| Available Phosphate (P₂O₅) | 4.0% |
| Soluble Potash (K₂O) | 7.0% |
| Magnesium (Mg) | 0.852% |
| Sulfur (S) | 1.37% |
| Micronutrients Included | Boron, Copper, Manganese, Molybdenum, Zinc |
| Derived From | Potassium Nitrate, Magnesium Sulfate, Monopotassium Phosphate, Potassium Sulfate, Manganese Sulfate, Boric Acid, Zinc Sulfate, Copper Sulfate, Sodium Molybdate |
| Use Stage | Flowering |
B.C. Bloom is designed to be used alongside B.C. Boost during the flowering stage — the 1:1 ratio (Boost first, then Bloom) is the standard protocol. B.C. Boost supplies calcium and iron that complement the phosphate- and potassium-heavy Bloom formula. Running Bloom without Boost is possible but leaves your plants without the calcium and chelated iron that Boost provides, which can create deficiency symptoms in high-demand flowering strains.
B.C. Bloom is compatible with hydroponic systems, coco coir, soilless mixes, and conventional soil. TechnaFlora designed the B.C. line to perform across all major growing media. Dose and frequency may need slight adjustment depending on your medium's buffering capacity and your strain's uptake rate, but the base formula is medium-agnostic.
TechnaFlora formulates the B.C. line to minimize pH drift through the nutrient chemistry itself — the nitrate-only nitrogen source and the specific salt composition are designed to produce low pH fluctuation in solution. Operators using the full B.C. system (Grow, Boost, Bloom) generally report stable reservoir pH within the 5.5–6.5 target range with less frequent manual correction compared to some competing formulas. That said, water source chemistry (alkalinity, hardness) still plays a role and should be accounted for in your reservoir management.
TechnaFlora offers B.C. Bloom in 500mL, 1L, 4L, 10L, 20L, 65L, 205L, and 1000L formats. Hydro Supply Co. can quote any size — reach out if your program requires drum or tote quantities.
B.C. Bloom is a base nutrient, not a proprietary locked system, so it is generally compatible with third-party supplements including PK boosters, silica, enzymes, and beneficial microbial products. Standard best practice applies: add each product to your reservoir water separately, check compatibility and pH after each addition, and avoid mixing concentrates directly together before dilution. If you are running a specific supplement stack and want to verify compatibility, reach out and we can walk through it.
Get operator-direct pricing and availability. We supply licensed commercial cultivators nationwide.
Request a Quote