Emerald Harvest Cali Pro Grow B 2-2-5

Emerald Harvest Cali Pro Grow B 2-2-5 is the phosphorus-, potassium-, magnesium-, and sulfur-rich Part B component of the professional Cali Pro two-part vegetative base nutrient system. It works with Cali Pro Grow A to support vigorous root development, sturdy stems, productive branching, green foliage, and rapid vegetative growth.

Grow B supplies balanced nitrogen and phosphorus with elevated potassium for water regulation, nutrient transport, enzyme activity, and structural development. Magnesium and sulfur support chlorophyll, photosynthesis, protein formation, and continued plant metabolism throughout the vegetative stage.

Important: This Listing Is for Grow B Only

This product listing includes Emerald Harvest Cali Pro Grow B only.

Cali Pro Grow A is required to create the complete two-part vegetative nutrient program and is sold separately. Grow B is not intended to provide complete base nutrition by itself.

Always use equal amounts of Grow A and Grow B according to the Emerald Harvest feeding chart.

Key Benefits

• Vegetative-stage nutrition: Supports vigorous roots, stems, branches, and foliage.
• Potassium-rich formula: Supports water regulation, nutrient movement, enzyme activation, and plant metabolism.
• Balanced nitrogen: Supplies ammoniacal and nitrate nitrogen for active vegetative development.
• Phosphorus support: Contributes to energy transfer, root development, and early plant establishment.
• Magnesium nutrition: Supports chlorophyll production, photosynthesis, and enzyme activity.
• Sulfur support: Contributes to proteins, enzymes, and other essential plant compounds.
• Balanced two-part design: Complements the calcium, nitrogen, and chelated micronutrients supplied by Grow A.
• Equal-part simplicity: Grow A and Grow B are measured at matching rates throughout the vegetative schedule.
• Hydroponic compatibility: Suitable for growing media used in recirculating and drain-to-waste systems.

Guaranteed Analysis

• N-P-K: 2-2-5
• Total nitrogen: 2%
  • 0.3% ammoniacal nitrogen
  • 1.7% nitrate nitrogen
• Available phosphate: 2%
• Soluble potash: 5%
• Magnesium: 0.5%
  • 0.5% water-soluble magnesium
• Sulfur: 0.5%
  • 0.5% combined sulfur

Nutrient Sources

Cali Pro Grow B is derived from:

• Potassium nitrate
• Monopotassium phosphate
• Magnesium nitrate
• Ammonium nitrate
• Magnesium sulfate

These ingredients supply the nitrogen, phosphorus, potassium, magnesium, and sulfur that complement the calcium and micronutrient package provided by Cali Pro Grow A.

How Grow B Supports Vegetative Development

Each component of Grow B performs an important role during active plant growth:

• Nitrogen: Supports chlorophyll, amino acids, proteins, enzymes, and new plant tissue.
• Phosphorus: Contributes to energy transfer, root activity, cell division, and early plant establishment.
• Potassium: Supports water regulation, nutrient transport, carbohydrate movement, and enzyme activation.
• Magnesium: Forms the central atom of chlorophyll and supports photosynthesis.
• Sulfur: Contributes to proteins, enzymes, and other essential plant compounds.

Grow B provides only part of the required nutrient profile. Grow A must be used with it to supply calcium and chelated micronutrients.

Why Grow A and Grow B Are Separate

Grow A contains concentrated calcium, while Grow B contains concentrated phosphorus and sulfur sources. Combining the undiluted concentrates can cause these minerals to react and form insoluble deposits.

Keeping the components separate maintains concentrate stability during storage. Once Grow A has been thoroughly diluted into water, Grow B can be added safely to complete the nutrient solution.

Never mix undiluted Grow A and Grow B directly together.

Official Application Rates

Use equal amounts of Cali Pro Grow A and Cali Pro Grow B:

• Seedlings and Cuttings: Use 2 mL of Grow A and 2 mL of Grow B per gallon.
• Transplants: Use 3 mL of Grow A and 3 mL of Grow B per gallon.
• Early Vegetative Growth: Use 4 mL of Grow A and 4 mL of Grow B per gallon.
• Late Vegetative Growth: Use 5 mL of Grow A and 5 mL of Grow B per gallon.
• Flowering Week 1 – Transition: Continue with 5 mL of Grow A and 5 mL of Grow B per gallon.
• Flowering Week 2: Discontinue Grow A and Grow B and transition to Cali Pro Bloom A and Bloom B.

To extend the vegetative phase, Emerald Harvest recommends repeating one or more late-vegetative weeks. Monitor plant response, source-water quality, EC or PPM, and growing conditions throughout the feeding program.

Correct Mixing Instructions

1. Shake both nutrient containers thoroughly before measuring.
2. Fill the reservoir or watering container with fresh water.
3. Add the measured amount of Cali Pro Grow A first.
4. Mix thoroughly until Grow A is completely dispersed.
5. Add an equal amount of Cali Pro Grow B.
6. Mix thoroughly again.
7. Add compatible supplements individually, stirring between each addition.
8. Check the completed solution’s EC or PPM and pH before feeding.

Never add Grow B before Grow A, and never combine the undiluted concentrates.

Water Temperature and pH

Emerald Harvest recommends:

• Nutrient-solution temperature: 60–72°F
• Final pH after mixing: 5.8–6.3

Add Grow A, Grow B, and any compatible supplements before making final pH adjustments. Apply pH adjusters gradually and test the solution between additions.

Transitioning to Cali Pro Bloom

Continue using Cali Pro Grow A and Grow B through the first flowering transition week. Beginning in flowering week two, discontinue the Grow formulas and replace them with Cali Pro Bloom A and Bloom B.

Do not use Grow B as a substitute for Bloom B. Although both Part B formulas supply phosphorus, potassium, magnesium, and sulfur, each is balanced for a different stage of plant development.

Growing Media and System Compatibility

Cali Pro Grow A and Grow B are suitable for growing media used in:

• Recirculating hydroponic systems
• Drain-to-waste systems
• Coco coir
• Rockwool
• Deep water culture
• Flood-and-drain systems
• Drip irrigation and fertigation
• Other hydroponic and soilless applications

Adjust nutrient strength according to plant variety, source water, growing medium, environmental conditions, and system design.

Using It With Emerald Harvest Supplements

Cali Pro Grow A and Grow B can be incorporated into an Emerald Harvest vegetative program with products such as Emerald Goddess, Honey Chome, Root Wizard, Cal-Mag, and Sturdy Stalk.

Follow the applicable feeding chart and monitor total EC or PPM when combining products. Emerald Harvest recommends applying Cal-Mag and Sturdy Stalk on water-only days and not using both during the same watering.

Important Usage Notes

• This listing includes Grow B only.
• Cali Pro Grow A is required and sold separately.
• Grow B is not a complete stand-alone fertilizer.
• Grow B does not supply the calcium and chelated micronutrients found in Grow A.
• Always use Grow A and Grow B in equal amounts.
• Continue the Grow formulas through flowering week one, then transition to Cali Pro Bloom.
• Add Grow A to fresh water first, mix thoroughly, and then add Grow B.
• Never combine undiluted Part A and Part B concentrates.
• Monitor plants for signs of stress when following an aggressive feeding program.
• Store tightly sealed away from direct sunlight and temperatures that may cause crystallization.