Emerald Harvest Cali Pro Bloom A 3-0-3 | 1gal - (Case of 4)

Two-Part Base Nutrient Part A for Bloom Phase in Hydroponic and Coco Systems (1gal)

Emerald Harvest Cali Pro Bloom A 3-0-3 is Part A of the Cali Pro two-part base nutrient system for the bloom phase. Used together with Cali Pro Bloom B (1-4-6), it delivers a complete base nutrient program for the flowering and fruiting phase. The Cali Pro system is designed for growers who want an easy-to-use two-part system that delivers consistent, professional-level results.

The 1gal size (Case of 4) is convenient for home growers, small-scale cultivators, and those new to the Cali Pro system who want a manageable supply of Bloom A for use throughout the flowering phase.

Key Features & Benefits

• Part A of Two-Part Bloom System — Used together with Cali Pro Bloom B (1-4-6) to form a complete two-part base nutrient for the bloom phase.
• 3-0-3 NPK — Provides nitrogen and potassium with no phosphorus — Part A's role in the balanced two-part Bloom system.
• Designed for Easy Use — Formulated to be straightforward to use while delivering consistent, professional-level results.
• For Hydroponic and Other Growing Media — Suited for hydroponic systems, coco coir, and a wide range of growing media.
• Flexible Feeding Program — Can follow the label feeding schedule or be incorporated into a custom nutrition program.

Who Should Use Emerald Harvest Cali Pro Bloom A 3-0-3

Cali Pro Bloom A 3-0-3 suits hydroponic growers, indoor cultivators, and commercial plant producers who use the Cali Pro two-part base nutrient system during the bloom phase. It is used alongside Cali Pro Bloom B (1-4-6) as a complete base nutrient program for the flowering and fruiting phase of plant growth.

Two-Part Base Nutrient Systems

Two-part base nutrient systems separate their nutrient formulas into two distinct solutions — Part A and Part B — to prevent incompatible ions from reacting in concentrated form. When Part A and Part B are diluted separately into the reservoir or feed water, the nutrients can then combine safely in solution at working concentrations. This approach allows manufacturers to include a broader range of nutrients than would be stable in a single concentrated bottle. Cali Pro Bloom A (3-0-3) and Cali Pro Bloom B (1-4-6) together provide the primary macronutrients and supporting elements needed for the bloom and fruiting phase.

Frequently Asked Questions

Do I need both Bloom A and Bloom B to use the Cali Pro system?

Yes. Cali Pro Bloom A (3-0-3) and Bloom B (1-4-6) are used together as a two-part base nutrient system. Each part contains a portion of the nutrients, and both are required to deliver the complete bloom-phase nutrition program.

Why is Cali Pro a two-part system?

Two-part systems keep certain nutrients separated in concentrated form to prevent reactions that would make them unavailable. When diluted separately into feed water, they can then combine safely at working concentrations. This allows the system to include a wider range of nutrients than a single-bottle concentrate.

What does the 3-0-3 NPK ratio mean for Bloom A?

The 3-0-3 ratio means Bloom A provides 3% nitrogen and 3% potassium with no phosphorus. The phosphorus and remaining nutrients are supplied by Cali Pro Bloom B (1-4-6) when the two parts are used together.

Can Cali Pro be used in soil as well as hydroponics?

Cali Pro is designed for use in hydroponic systems and other growing media including coco coir. Follow current label directions for rates and application methods suited to your growing system.

How do I follow the Cali Pro feeding schedule?

Emerald Harvest provides a feeding schedule for the Cali Pro system on the label and through their published feed charts. Growers can follow the label schedule or use the Cali Pro nutrients as part of a custom feeding program.