Emerald Harvest Cali Pro Bloom B 1-4-6 | 15gal

Part B of a Two-Bottle Bloom-Phase Base Nutrient System, 15gal

Cali Pro Bloom B 1-4-6 is the second half of Emerald Harvest's bloom-phase base nutrient pair, formulated to supply the phosphorus- and potassium-heavy portion of bloom nutrition that stays separate from Bloom A 3-0-3 until both are diluted in the reservoir. On its own, Bloom B doesn't cover the full nutrient profile flowering and fruiting plants need.

The 15gal size is built for commercial-scale bloom-phase feeding, reducing how often Bloom B needs restocking across a large crop.

Key Features & Benefits

• Companion to Cali Pro Bloom A — the second half of a matched two-bottle bloom-phase pair.
• 1-4-6 nutrient profile — phosphorus- and potassium-heavy, weighted toward flower and fruit development.
• Bloom and fruiting formulation — built for the flowering stage rather than vegetative growth.
• Reservoir-mixed compatibility — designed to combine safely with Bloom A once both are diluted.
• Five container options — sized from a 32oz trial bottle up through a 15gal commercial container.

Who Should Use Cali Pro Bloom B 1-4-6

This half of the pair fits the same growers using Cali Pro Bloom A -- anyone running Emerald Harvest's two-bottle system through the flowering and fruiting phase.

About Emerald Harvest

Since founding the company in Santa Rosa, California in 2015, Emerald Harvest has positioned its Cali Pro two-part system, including Bloom A and Bloom B, as an alternative to its original three-bottle Grow, Micro, Bloom base nutrients.

Frequently Asked Questions

Can Bloom B be used without Bloom A?

No, Bloom B is formulated to supply only part of the bloom-phase nutrient profile, with Bloom A 3-0-3 providing the rest. Using either bottle alone leaves out nutrients the other is built to supply.

Why is the phosphorus level so much higher in Bloom B than in Bloom A?

Bloom B's 1-4-6 ratio is weighted toward phosphorus and potassium specifically because those nutrients play the larger role in flower and fruit development during the bloom phase. Bloom A's 3-0-3 ratio covers nitrogen and potassium instead, splitting the bloom-phase macronutrients across the two bottles.

How do I mix Bloom A and Bloom B into my reservoir?

Add each part to your reservoir water separately per the Emerald Harvest label feeding schedule rather than combining them at full concentration first. This keeps the two nutrients from reacting before they're diluted.

What size should I choose for a commercial flowering crop?

The 6gal and 15gal sizes are built for larger home operations and commercial-scale feeding respectively, cutting down on how often you'd need to restock compared to the 32oz or 1gal sizes. All sizes contain the same 1-4-6 concentrate.

Is Bloom B compatible with coco coir as well as hydroponic reservoirs?

Yes, it's formulated to work across hydroponic systems, coco coir, and other common bloom-phase growing media. Check the Emerald Harvest feed chart for media-specific rate adjustments.