Emerald Harvest Cali Pro Bloom B, 1 qt

Part B of the Cali Pro 2-Part Bloom Base Nutrient, 1 Qt

Cali Pro Bloom B completes the flowering side of Emerald Harvest's 2-part Cali Pro system, dosed in equal measure alongside Bloom A at every reservoir change. The two bottles stay separate because Bloom B's phosphate- and sulfate-based minerals would precipitate out of solution if concentrated in the same bottle as Bloom A's calcium. Between the two bottles, Bloom A and B cover the complete flowering-phase mineral profile — nitrogen, phosphorus, potassium, calcium, magnesium, and sulfur, along with chelated iron, cobalt, manganese, and zinc. Bloom B specifically carries the phosphate and sulfate-based minerals that would react with Bloom A's calcium if the two were concentrated together in a single bottle.

The 1-quart size is a practical starting point for a grower sampling the Cali Pro bloom pair before scaling up.

Key Features & Benefits

• Part B of the Bloom pair — always mixed in equal portions with Cali Pro Bloom A during flowering.
• Carries phosphate and sulfate-based minerals — kept separate from Bloom A's calcium to prevent precipitation reactions.
• Flowering-stage macronutrient balance — phosphorus and potassium levels weighted toward budding and fruiting.
• Chelated micronutrient package — iron, cobalt, manganese, and zinc remain available through bud development.
• Even 1:1 mixing — measure equal parts Bloom A and Bloom B — no separate schedules to track.

Who Should Use Cali Pro Bloom B

Cali Pro Bloom B suits growers looking for a simpler 2-bottle flowering formula rather than managing the extra mixing step the 3-part Grow, Micro, Bloom system adds. It works in rockwool, coco coir, deep water culture, ebb and flow, NFT, and soil grow rooms.

About Emerald Harvest Cali Pro Bloom

Bloom A and Bloom B form the flowering half of the Cali Pro line, the 2-part system Emerald Harvest built for growers who want fewer bottles than its original 3-part Grow, Micro, Bloom series while still covering the full flowering nutrient profile.

Frequently Asked Questions

Why is Cali Pro Bloom split into A and B bottles?

Bloom B's phosphate and sulfate minerals would react with Bloom A's calcium if the two were concentrated together in one bottle. Keeping them separate until both are diluted into the reservoir avoids that precipitation.

How should Bloom A and Bloom B be mixed together?

Start with reservoir water, stir in Bloom A completely, then add an equal amount of Bloom B and mix again. Keep the two concentrates from touching each other directly — dilution should always happen in the reservoir, not bottle-to-bottle.

What does Bloom B specifically contribute?

Bloom B carries the phosphate and sulfate-based portion of the flowering nutrient profile, along with part of the chelated micronutrient load. Combined in equal portions with Bloom A's calcium and remaining micronutrients, it completes the full bloom-phase formula.

Can Bloom B be used by itself?

No, Bloom B alone doesn't supply a complete nutrient profile. It's formulated to be mixed in equal portions with Bloom A.

How should Bloom B be stored before mixing?

Store the sealed bottle somewhere cool, dark, and above freezing until you're ready to use it. Keep it apart from any opened Bloom A concentrate — the two shouldn't come into direct contact until they're diluted together in the reservoir.