Emerald Harvest Cali Pro Grow B, 2.5 gal - (Case of 2)

Part B of the Cali Pro 2-Part Vegetative Base Nutrient, 2.5 Gal

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

A home or small commercial veg room usually runs the 2.5-gallon size of the 2-part Cali Pro vegetative formula for a full cycle. Sold as a case of 2.

Key Features & Benefits

• Part B of the Grow pair — always mixed in equal portions with Cali Pro Grow A during the vegetative phase.
• Carries phosphate and sulfate-based minerals — kept separate from Grow A's calcium to prevent precipitation reactions.
• Vegetative-stage nutrient balance — nitrogen, phosphorus, and potassium levels weighted for growth and root development.
• Chelated micronutrient package — iron, cobalt, manganese, and zinc remain available through the vegetative stretch.
• Even 1:1 mixing — measure equal parts Grow A and Grow B — no separate schedules to track.

Who Should Use Cali Pro Grow B

Cali Pro Grow B suits growers who'd rather run a simpler 2-bottle vegetative formula than manage the extra mixing step the 3-part Grow, Micro, Bloom system adds. It's suited to rockwool, coco coir, deep water culture, ebb and flow, NFT, and soil systems.

About Emerald Harvest Cali Pro Grow

Grow A and Grow B form the vegetative 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 vegetative nutrient profile.

Frequently Asked Questions

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

Grow B's phosphate and sulfate minerals would react with Grow A's calcium if concentrated together in one bottle. Keeping them apart until dilution avoids that precipitation issue.

How should Grow A and Grow B be mixed together?

Add Grow A to reservoir water and stir until fully dissolved, then add an equal portion of Grow B and mix again. The two concentrates should never touch each other directly — always dilute each one into the reservoir on its own.

What does Grow B specifically contribute?

Grow B carries the phosphate and sulfate-based portion of the vegetative nutrient profile along with part of the chelated micronutrient load. Combined in equal portions with Grow A, it completes the full veg-phase formula.

Can Grow B be used by itself?

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

How should Grow B be stored before mixing?

Keep the sealed container in a cool spot out of direct sunlight and away from freezing temperatures. Store it apart from opened Grow A concentrate so the two stay separated until they're diluted together in the reservoir.