Emerald Harvest Cali Pro Bloom B – Quart

Emerald Harvest Cali Pro Bloom B is the B-component of a 2-part base nutrient series formulated for high-yield indoor crops during the flowering and fruiting stage. Rich in phosphorus, potassium, and chelated trace elements including iron, cobalt, manganese, and zinc, it works alongside Cali Pro Bloom A to deliver a complete nutrient profile that supports robust harvests. This quart-size bottle (32 fl oz) suits growers who want a proven base nutrient without overcomplicating their feed program.

Emerald Harvest Cali Pro Bloom B – Quart Specifications

The following specifications are derived from the canonical product data and supplier documentation for SKU HGC723918.

Why Choose Emerald Harvest Cali Pro Bloom B

Cali Pro Bloom B is part of a straightforward 2-part base nutrient system that removes guesswork from the flowering feed program. Here is what makes it worth considering:

• Complete 2-part system built for indoor crops: Cali Pro Bloom A & B together form a complete base nutrient solution. Using both parts provides the full elemental spectrum your flowering plants need without requiring a large stack of separate additives.
• Rich in phosphorus and potassium for flowering: The Bloom B formula prioritizes the nutrients most associated with flower and fruit development — phosphorus for energy transfer and root support, and potassium for strong cell structure and water regulation during heavy fruiting phases.
• Chelated trace elements for reliable uptake: The formula includes chelated iron, cobalt, manganese, and zinc. Chelation bonds trace minerals to organic molecules that plants can absorb more readily, reducing the risk of lockout in both hydroponic and soilless media.
• Nitrogen-rich base supports structure through bloom: While bloom-stage nutrients typically emphasize P and K, Cali Pro maintains a nitrogen component to sustain stem and leaf tissue integrity throughout the entire flowering cycle, helping plants hold up under heavy bud loads.
• Compatible with the Cali Pro Grow series: Growers who run Cali Pro Grow A & B during vegetative growth can transition directly to Cali Pro Bloom A & B at flower flip without switching nutrient brands or recalibrating their feed approach.

Best Uses for Emerald Harvest Cali Pro Bloom B

Cali Pro Bloom B is designed for the flowering and fruiting phase of indoor crop production. The following scenarios describe where it fits best in a grow program:

• Hydroponic systems (recirculating and drain-to-waste): The liquid concentrate dissolves cleanly in reservoir water. It is suited for NFT, deep water culture, ebb-and-flow, and drip systems where consistent nutrient delivery is important during the bloom phase.
• Coco coir and perlite media: Growers running inert or near-inert soilless substrates benefit from a structured 2-part base nutrient that supplies all macro and micronutrients in known ratios, since the media provides no nutrient buffering of its own.
• High-yield indoor fruiting crops: The phosphorus and potassium emphasis in the Bloom B formulation is appropriate for crops that produce dense, heavy flowers or fruit where plants draw heavily on P and K stores during the final weeks of the cycle.
• Growers transitioning from a Cali Pro Grow program: Using the same 2-part platform across both veg and bloom simplifies feed chart management. If you already run Cali Pro Grow A & B, Bloom A & B follows the same dosing logic at the flip.
• Quart-size quantities for small-to-medium grow rooms: At 32 fl oz, this bottle size suits growers with one to four light setups or smaller commercial cultivation rooms where purchasing a gallon at a time would result in product sitting unused past its useful shelf life.

If you are also building out your grow environment, see the 48x48x78 grow tent for a compatible indoor cultivation space, or consider a pH-perfect bloom nutrient if you prefer an alternative base system to compare against.

Compatibility

Cali Pro Bloom B is designed to be used as part of the Emerald Harvest Cali Pro 2-part system. The following notes cover common compatibility considerations based on the product description and standard practices for liquid concentrate base nutrients:

• Must be paired with Cali Pro Bloom A: Part B is one half of a 2-component system. It is not intended to be used as a standalone nutrient. Both Part A and Part B must be mixed into your reservoir or feed solution to deliver a complete macro and micronutrient profile for the flowering stage.
• Compatible with the Cali Pro Grow series: Growers who used Cali Pro Grow A & B during vegetative growth can follow the same base nutrient brand through to harvest by switching to Bloom A & B at the start of the flowering cycle.
• Suitable for hydroponic and soilless media: The liquid concentrate is formulated for use in hydroponic systems and soilless substrates such as coco coir and perlite. It is not formulated as a stand-alone soil amendment, though some growers use similar 2-part systems in heavily amended soilless mixes.
• Mix Part A and Part B separately: As with all 2-part systems, add Part A and Part B to your reservoir or mixing container separately, not together in concentrate form, to prevent nutrient interaction before dilution. Add each part to water in sequence and stir between additions.
• Monitor EC and pH after mixing: After combining A and B in your reservoir, measure electrical conductivity (EC) to confirm nutrient concentration is within the target range for your crop and growth stage. Adjust pH to the appropriate range for your growing medium (typically 5.5–6.2 for hydro and coco).

For lighting during the flowering phase, the Eye Hortilux 600W Ceramic HPS grow light bulb is a commonly paired bloom-stage light source in indoor gardens.

Dosing Guidelines

The following dosing guidance is derived from standard practice for Emerald Harvest Cali Pro 2-part base nutrients. Always consult the official Emerald Harvest feed chart for your specific crop and growth stage, as dose rates vary by week and strain. The information below describes the general approach.

• Use Cali Pro Bloom A & B during the flowering phase only: Switch from the Cali Pro Grow A & B formulation to Bloom A & B when you initiate the flowering cycle (typically at the photoperiod flip for light-sensitive crops).
• Add to water — not water to concentrate: Measure the required amount of Part B (and Part A separately) and add each to your mixing reservoir of water. Stir or circulate after each addition before checking EC and pH.
• Dose both Part A and Part B in equal volumes: The Cali Pro system is designed for equal-part dosing of A and B. If your feed chart calls for 4 mL/L of base nutrient, use 4 mL/L of Part A and 4 mL/L of Part B.
• Verify EC is within the target range for your crop: After mixing, use a calibrated EC meter to confirm that your reservoir or feed solution is within the appropriate conductivity range for your plants’ current stage of flowering. Heavier-feeding crops and later bloom weeks typically support higher EC targets.
• Adjust pH after mixing: Once A and B are combined and EC is confirmed, adjust pH to the correct range for your growing medium. For hydroponic systems and coco, target approximately 5.8–6.2. For soilless potting mixes with some organic buffering, a slightly higher pH in the 6.0–6.5 range is typically used.
• Adjust dosage based on plant response: Monitor leaves for signs of deficiency or excess (yellowing, tip burn, discoloration) and adjust dosing upward or downward accordingly. Runoff EC readings can also guide adjustments in drain-to-waste systems.

How to Use Cali Pro Bloom B

1. Shake the Cali Pro Bloom B bottle thoroughly before each use to ensure the concentrate is fully homogenized.
2. Fill your reservoir or mixing container with fresh, pH-neutral water at the appropriate temperature for your system (generally 65–72°F / 18–22°C).
3. Measure the required dose of Cali Pro Bloom A using a calibrated syringe or measuring cup. Add Part A to the water first and stir or circulate until fully dissolved.
4. Measure the same volume of Cali Pro Bloom B and add it to the reservoir separately. Stir or run your circulation pump for a few minutes to ensure even mixing.
5. Check the electrical conductivity (EC) of the mixed solution using a calibrated EC meter. Compare against the target EC for your crop and current week of flowering.
6. Adjust pH to your target range using a pH-up or pH-down solution, adding small amounts and re-measuring until stable. For most hydroponic and coco applications, target 5.8–6.2.
7. Deliver the mixed nutrient solution to your plants according to your normal irrigation schedule. In recirculating systems, top off with plain water between full reservoir changes to maintain target EC.
8. Change out the reservoir or flush drain-to-waste systems on a schedule appropriate for your crop load and feeding intensity. Inspect plants between feeds for signs of deficiency or excess.

Sources & Further Reading