Emerald Harvest Cali Pro Grow B, 1 qt

Emerald Harvest Cali Pro Grow B – 2-Part Grow Base Nutrient, 1 Quart

The Emerald Harvest Cali Pro series is a 2-part base nutrient system with four components: Cali Pro Grow A and Grow B for the vegetative phase, and Cali Pro Bloom A and Bloom B for the flowering phase. Each phase uses its own A and B pair, which are always used together in equal portions. Keeping each formula separated into an A and B part prevents the precipitation of incompatible elements that would occur if all concentrated minerals were combined in a single bottle. When mixed into nutrient solution in equal portions, the A and B parts together provide the complete macro and micronutrient profile for their respective growth phase.

The Cali Pro system provides the full essential element profile: nitrogen (N), phosphorus (P), potassium (K), calcium (Ca), magnesium (Mg), and sulfur (S) as primary and secondary macronutrients, plus chelated trace elements including iron, cobalt, manganese, and zinc. Chelated micronutrients remain plant-available across a wider pH range than non-chelated salts, reducing the risk of micronutrient lockout in the root zone.

Key Features & Benefits

• Part B of Cali Pro Grow 2-Part System — Used in equal portions with Grow A during the vegetative phase.
• Veg-Phase Formula — Nutrient ratios weighted for vegetative growth, root development, and structural establishment.
• Full Macro and Micronutrient Profile — N, P, K, Ca, Mg, S plus chelated Fe, Co, Mn, and Zn.
• Chelated Micronutrients — Broad pH availability — reduces risk of micronutrient lockout.
• Simple Equal-Parts Feeding — Measure and pour equal portions of Grow A and B — no complex ratios.
• Works in Any Growing Medium — Suitable for hydro, coco, rockwool, ebb and flow, NFT, and soil.
• 1 Quart Size — Entry or trial size.

Who Should Use Cali Pro Grow B

Cali Pro is for growers who want a straightforward 2-part system — simple enough for new growers to follow without a complex feeding chart, and complete enough for experienced growers who want a reliable, consistent base nutrient program. It works in any growing medium including rockwool, coco coir, deep water culture, ebb and flow, NFT, and soil.

Mixing Protocol for Cali Pro Grow A and B

Always add nutrient concentrates to your reservoir water — never mix concentrates together directly. Add the A part first, mix thoroughly, then add the B part and mix again before checking pH and EC. Follow Emerald Harvest's recommended feed chart as a starting point and adjust based on plant response and runoff EC readings. During vegetative growth, use Grow A and B. Switch to Bloom A and B as the plant transitions into flowering. Never mix Grow and Bloom components in the same reservoir — use one set or the other depending on growth stage.

Frequently Asked Questions

What does 'A and B' mean in a 2-part nutrient system?

In a 2-part system, elements that would react and precipitate if concentrated together are separated into two bottles — A and B. When diluted in water and mixed together, they provide the complete nutrient profile without precipitation.

Can Cali Pro be used in any growing medium?

Yes. Cali Pro works in any growing medium: rockwool, coco coir, DWC, ebb and flow, NFT, and soil.

What is the mixing order?

Add Part A to reservoir water first, mix, then add Part B and mix again before measuring pH and EC. Never mix the concentrates directly together.

Should I use Grow A+B and Bloom A+B at the same time?

No. Use Grow A and B during the vegetative phase. Switch to Bloom A and B during the flowering phase. Do not mix Grow and Bloom components in the same reservoir.

What is the difference between Cali Pro Grow A and Grow B?

Grow A and Grow B contain different concentrated mineral groups that are separated to prevent precipitation when stored as concentrates. Together, in equal portions, they deliver the complete vegetative-phase nutrient profile.