Emerald Harvest Cali Pro Grow A, 270 gal

Part A of the Cali Pro 2-Part Vegetative Base Nutrient, 270 Gal

Cali Pro Grow A handles the vegetative side of Emerald Harvest's 2-part Cali Pro system, always diluted together with an equal measure of Grow B at reservoir changes. Grow A's calcium is kept in its own bottle because it would react with the phosphate and sulfate salts in Grow B if the two were combined at concentrate strength. Grow A and Grow B together supply the full vegetative-phase profile: nitrogen, phosphorus, potassium, calcium, magnesium, and sulfur, plus chelated iron, cobalt, manganese, and zinc. Grow A specifically carries the calcium and a portion of the micronutrient load kept separate from Grow B's phosphate and sulfate salts to prevent precipitation.

The 270-gallon size is built for commercial operations running Cali Pro Grow A and B across a large vegetative footprint.

Key Features & Benefits

• Part A of the Grow pair — always mixed in equal portions with Cali Pro Grow B during the vegetative phase.
• Carries calcium and part of the micronutrient load — kept separate from Grow B to prevent precipitation reactions.
• Veg-phase nutrient ratio — weighted for vegetative growth, root development, and structural establishment.
• Chelated iron, cobalt, manganese, and zinc — formulated to stay plant-available through the vegetative feeding window.
• Straightforward 1:1 dosing — no per-stage math — equal parts Grow A and Grow B at every feeding.

Who Should Use Cali Pro Grow A

Growers who want a 2-bottle vegetative formula instead of the added mixing steps of the 3-part Grow, Micro, Bloom lineup are the target audience for Cali Pro Grow A. It suits rockwool, coco coir, deep water culture, ebb and flow, NFT, and soil growing setups.

About Emerald Harvest Cali Pro Grow

Cali Pro Grow A and Grow B make up the vegetative half of Emerald Harvest's 2-part Cali Pro lineup, developed as a simpler two-bottle alternative to the Santa Rosa, California brand's original 3-part Grow, Micro, Bloom system.

Frequently Asked Questions

Why does Cali Pro Grow split A and B into separate bottles?

Grow A's calcium would react with Grow B's phosphate and sulfate minerals if the two were concentrated together in a single bottle. Splitting the formula keeps the concentrate stable until both parts are diluted into the reservoir.

How do I mix Grow A and Grow B correctly?

Fill the reservoir with water, dissolve in Grow A completely, then add an equal portion of Grow B and stir again. Keep the two concentrates apart from each other — dilution happens in the reservoir, never bottle-to-bottle.

What is the difference between Grow A and Grow B?

Grow A carries the calcium and part of the chelated micronutrient load, while Grow B carries the phosphate, sulfate, and remaining minerals. Mixed together in equal portions, they supply the complete vegetative-phase nutrient profile.

Can Cali Pro Grow A be used without Grow B?

No, Grow A alone doesn't supply the complete macro- and micronutrient profile needed for vegetative growth. It's formulated to be used in equal portions with Grow B.

When during the grow cycle should I switch from Cali Pro Grow to Cali Pro Bloom?

Switch as the plant transitions out of vegetative growth and into flowering, typically once flower sites begin forming. The Cali Pro system separates Grow A/B from Bloom A/B specifically so the ratio can shift with the plant's growth stage.