Advanced Nutrients Ph Perfect Connoisseur Coco Bloom – Bloom B 4L

Advanced Nutrients pH Perfect Connoisseur Coco Bloom Part B is the phosphorus-and-potassium half of a 2-part flagship bloom base built specifically for coco coir. The 4 L bottle delivers a 1-4-5 NPK profile, diversely chelated iron in four forms, and pH Perfect Technology that auto-stabilises the reservoir at 5.5–6.3 for the entire flowering phase when paired with Part A.

Connoisseur Coco Bloom Part B Specifications

The headline specs below are sourced from the canonical supplier listing and the Advanced Nutrients product documentation for the pH Perfect Connoisseur Coco line. Use these figures to plan reservoir builds, freight, and shelving footprint.

Why Choose Connoisseur Coco Bloom Part B

Connoisseur Coco Bloom sits at the top of the Advanced Nutrients base-nutrient stack for coco growers. Where Sensi Coco Bloom is positioned for intermediate operators and runs a 0-4-5 Part B with a simpler additive profile, the Connoisseur tier adds a 5-in-1 stack of humic acids, fulvic acid, a non-ionic wetting agent, a 20-type amino acid complex, and pH Perfect buffering inside the same bottle. That consolidation is the reason most growers running it can drop several standalone bloom adjuncts from their feed schedule.

Part B specifically carries the phosphorus and potassium that drive flower development, plus the bulk of the bloom-stage chelated micronutrients. The 1-4-5 ratio is intentionally heavy on K relative to P to support both bud bulking and the late-flower potassium demand that often gets undersized in generic bloom bases.

Three differentiators are worth calling out:

• Diversely chelated iron. Coco coir is notorious for tying up iron and triggering interveinal chlorosis on new growth. Connoisseur Coco Bloom carries iron in four chelate forms (amino acid complex, DTPA, EDDHA, EDTA) so at least one form remains plant-available across the pH and EC swings a coco reservoir sees during a flush-and-feed cycle.
• Amino-acid-chelated calcium and magnesium. Coco’s cation-exchange behaviour preferentially binds Ca and Mg ions, leaching them from the root zone. Including both as amino acid complexes (in addition to standard salts) reduces how much extra cal-mag a grower has to bolt on as a separate bottle.
• pH Perfect Technology. The buffering chemistry pulls the working solution into the 5.5–6.3 window and holds it there for roughly a week. For commercial rooms running multiple reservoirs, that eliminates a daily pH-check-and-adjust task and reduces the drift that causes lockouts mid-week.

Best Uses for Connoisseur Coco Bloom Part B

This is a bloom-phase product. It is not designed for vegetative growth and it is not designed for soil or pure-hydro rockwool runs. Use it where the medium is coco-based and the plants are past the stretch and into flower set.

• Commercial coco flower rooms. Single-strain or mixed-genetic rooms on a hand-water or drip-to-waste coco schedule, where the goal is a consistent flowering feed that doesn’t require daily pH correction across multiple reservoirs.
• Coco/perlite blend runs. 70/30 and 60/40 coco/perlite blends respond well to the chelated iron and amino-chelated Ca/Mg, since perlite contributes nothing to CEC and the coco fraction does all the buffering.
• Expert hobby growers chasing genetic ceiling. The brand’s positioning (“only truly expert growers need apply”) reflects the formulation’s assumption that the operator already manages EC, runoff EC, and irrigation frequency competently. Growers still learning those fundamentals will see better cost-per-gram from a simpler line first.
• High-EC bloom programs. Crops that tolerate or demand higher feed EC during peak flower benefit from the chelation breadth, because more of the micronutrient load stays available rather than precipitating out of solution.

Connoisseur Coco Bloom Part B vs Sensi Coco Bloom Part B

The most direct comparison is to the same brand’s intermediate-tier coco bloom base. Sensi Coco Bloom Part B runs a 0-4-5 NPK and carries the chelated iron and Ca/Mg-amino-complex chemistry, but it does not include the humic/fulvic/amino/surfactant 5-in-1 stack that defines the Connoisseur tier. A grower running Sensi Coco typically adds humic acid, fulvic acid, and a wetting agent as separate bottles, which closes some — but not all — of the gap. Connoisseur Coco’s 1-4-5 also contributes a small nitrogen background through bloom, which growers running heavy-feeding strains often need to add back manually when using a strictly 0-P-K bloom base.

Against a non-coco-specific bloom system such as General Hydroponics FloraBloom + FloraMicro, the differentiator is medium fit. Flora is a general-purpose 3-part line that requires the grower to assemble the coco-specific micro and cal-mag chemistry themselves; Connoisseur Coco is built for coco from the start, so the cation balance and iron chelation are already correct for the medium.

Part B is half of a pair. To complete the bloom base, run it alongside Advanced Nutrients Tarantula as a root-zone microbial inoculant for rhizosphere support, and round out late-flower bud density and finish quality with adjuncts such as Earth Juice Hi-Brix Molasses or a bloom booster of your choice. The Connoisseur Coco system tolerates additive stacking well because the base chemistry is already pH-buffered.

Compatibility

Compatibility for this product is narrower than a typical base nutrient because it’s medium-specific and phase-specific.

• Medium: 100% coco coir, coco/perlite blends, and coco-dominant peat/coco mixes. Not formulated for soil-based mixes or rockwool slabs without coco buffering.
• Companion bottle: Must be used with Advanced Nutrients pH Perfect Connoisseur Coco Bloom Part A (4-0-0) at a 1:1 ratio. Running Part B alone will starve the plant of nitrogen and most micronutrients.
• Irrigation method: Hand-water, drip-to-waste, and ebb-and-flow systems with coco substrate. Recirculating deep-water culture is not the intended application.
• Reservoir size: Suitable from small 5–10 L mix-and-pour reservoirs up to commercial 1,000+ L dosing tanks. The pH Perfect chemistry works the same at both scales.
• Root inoculants: Compatible with mycorrhizal and beneficial-bacteria products. Pair with a microbial like Heavy 16 Roots only if applied at separate watering events, since the pH Perfect buffering can interact with some microbe carriers when freshly mixed.
• Tank-mix order: Always add Part A first, stir, then Part B, stir again. Never mix concentrated Part A and Part B together undiluted — they will react and precipitate.
• Storage: Keep sealed, indoors, between 4°C and 30°C. Avoid freezing and direct sunlight, which can crash the chelate complexes.

Dosing Guidelines

The dosing rates below follow the published Advanced Nutrients pH Perfect Connoisseur Coco feed chart for the bloom phase. Both Part A and Part B are dosed at the same rate (1:1). Final EC and dilution should be tuned to your strain, light intensity, and runoff readings.

Notes on dosing:

• Match Part A and Part B 1:1. They are formulated to be balanced and chelated as a pair.
• Target reservoir EC during peak bloom typically lands at 1.8–2.4 mS/cm depending on strain. Adjust dose, not EC measurement.
• If runoff EC climbs above your input EC by more than 0.5 mS/cm, irrigate with plain water at the next event to clear salt buildup before resuming feed.
• pH Perfect chemistry handles reservoir pH automatically — checking pH daily is no longer load-bearing on the schedule, but spot-check weekly to confirm the buffer is intact.
• A 4 L bottle of Part B contains roughly 1,000 doses at 4 mL/L, enough to bloom-feed a 250 L reservoir through a full 6-week peak.

How to Mix and Apply

The Connoisseur Coco system is mixed in a specific order. Skipping or reversing steps causes precipitation that strands phosphate and calcium out of solution.

1. Start with fresh water. Use RO, dechlorinated tap, or rain water with a starting EC below 0.3 mS/cm. Bring the volume to the planned reservoir size.
2. Add Part A first. Measure the planned dose of pH Perfect Connoisseur Coco Bloom Part A and pour it directly into the reservoir while stirring or with the recirculation pump running.
3. Stir or circulate for 30–60 seconds. Let Part A fully disperse before adding anything else. This step is what prevents the concentrated A+B reaction.
4. Add Part B at the matching dose. Pour Connoisseur Coco Bloom Part B at the same volume as Part A. Stir or recirculate for another 60 seconds.
5. Add any bloom adjuncts. Bud-density boosters, carbs, root inoculants, and pK boosters go in after the base is fully mixed and dispersed.
6. Check EC. Confirm the final EC matches your week’s target. Adjust by adding water (lower EC) or matched A+B doses (raise EC) — never adjust with only one half.
7. Check pH once. The pH Perfect chemistry should drop the solution into 5.5–6.3 on its own. If you read outside that range, your water source likely has unusually high alkalinity; adjust once and move on.
8. Apply within 24–48 hours. The buffer chemistry holds for up to a week in a sealed reservoir, but micronutrient stability is best when the solution is used the same day or the next.
9. Rinse equipment between batches. Concentrated A and B residue inside a mixing jug will react over time. A quick water rinse between dosing is enough to prevent buildup.

Sources and Further Reading

Product specifications, NPK ratios, chelation details, and pH Perfect Technology behaviour are drawn from Advanced Nutrients’ published product documentation and feeding charts. Use the brand references below for the canonical feeding-rate tables and the formal product pages.

• Advanced Nutrients — Coco Base Nutrients overview
• Advanced Nutrients — pH Perfect Connoisseur Grow & Bloom (5-in-1 formulation details)
• Advanced Nutrients — Feeding Charts index (ml/L and ml/gal formats)
• Advanced Nutrients — pH Perfect Sensi Coco Grow & Bloom (comparison baseline)
• Advanced Nutrients — Brand homepage and pH Perfect Technology overview