Emerald Harvest Bloom, 15 gal

Emerald Harvest Bloom – Grow/Micro/Bloom 3-Part Base Nutrient, 15 Gallon

Emerald Harvest Bloom is the flowering component of the Grow/Micro/Bloom professional 3-part base nutrient series. The Grow/Micro/Bloom system is designed to give experienced growers maximum flexibility in their feeding programs — by keeping the nitrogen-dominant vegetative formula (Grow), the micronutrient-concentrated formula (Micro), and the phosphorus- and potassium-dominant flowering formula (Bloom) separate, growers can adjust mixing ratios at each stage of the grow cycle to precisely match the plant's nutritional demand at that phase.

Emerald Harvest Bloom provides primary macronutrients nitrogen, phosphorus, and potassium in ratios weighted toward the flowering phase. In addition to N, P, and K, Bloom supplies calcium, magnesium, and sulfur — the secondary macronutrients — along with chelated micronutrients including iron, copper, manganese, and zinc. Chelated micronutrients remain plant-available across a broader pH range than unchelated forms, reducing the risk of micronutrient lockout in the root zone. Used in combination with Grow and Micro, Bloom gives growers the ability to build a nutrient program from baseline vegetative through peak flower and final flush.

Key Features & Benefits

• Bloom-Phase Macronutrient Ratio — Phosphorus and potassium emphasis for flowering and fruiting development.
• All Essential Macronutrients — N, P, K, calcium, magnesium, and sulfur in one formula.
• Chelated Micronutrients — Iron, copper, manganese, and zinc in chelated form for broad pH availability.
• Flexible Mixing Ratios — Separate Grow/Micro/Bloom components allow ratio adjustment at each grow stage.
• Part of 3-Part System — Designed for use with Emerald Harvest Grow and Micro for a complete program.
• Supports Peak Flowering — Tailored for the reproductive phase of high-yield plants.
• 15 Gallon Size — Commercial bulk size for large facilities running high-volume Bloom feeding programs.

Who Should Use Bloom

Bloom is for growers running the Grow/Micro/Bloom 3-part system who want flexibility to adjust feeding ratios through the vegetative-to-flower transition and through the flowering phase. It is appropriate for any high-yield plant in any growing medium.

How to Use the Grow/Micro/Bloom 3-Part System

In a 3-part nutrient system, the three components are mixed into the reservoir or irrigation water in different ratios depending on the growth stage. During vegetative growth, more Grow is used relative to Bloom. As the plant transitions to flowering, the Bloom ratio is increased while Grow is decreased. Micro is used at a consistent rate throughout both phases to maintain the micronutrient profile. Always add Micro first when mixing, followed by Grow, then Bloom — this mixing order prevents precipitation reactions between the concentrated component formulas. Adjust ratios based on plant response and follow Emerald Harvest's recommended feeding schedule as a starting point.

Frequently Asked Questions

What is Bloom's role in the 3-part system?

Bloom is the phosphorus- and potassium-dominant component used during the flowering and fruiting phase. It is mixed with Grow and Micro to build the complete feeding program.

What micronutrients are included?

Chelated iron, copper, manganese, and zinc, in addition to calcium, magnesium, and sulfur.

Why are chelated micronutrients important?

Chelated micronutrients remain plant-available across a wider pH range than non-chelated forms, reducing the risk of deficiency from pH-related lockout in the root zone.

In what order should I mix the 3-part components?

Always add Micro to the water first, then Grow, then Bloom. This mixing order prevents precipitation reactions between the concentrated formulas.

Is Bloom a standalone formula?

No. Bloom is one component of the 3-part Grow/Micro/Bloom system and is intended for use with Emerald Harvest Grow and Micro.