Emerald Harvest Bloom, 1 qt

Phosphorus-Potassium Component of the Grow, Micro, Bloom System, 1 Qt

Emerald Harvest Bloom is the flowering-phase component of the Grow, Micro, Bloom professional 3-part base nutrient series. Keeping the nitrogen-forward vegetative formula (Grow), the micronutrient concentrate (Micro), and the phosphorus- and potassium-forward flowering formula (Bloom) in separate bottles lets growers shift the mixing ratio at each stage of the cycle instead of feeding a single fixed blend from seedling to harvest. Bloom supplies nitrogen, phosphorus, and potassium weighted toward flowering, plus calcium, magnesium, and sulfur, along with chelated iron, copper, manganese, and zinc. Chelated trace elements stay plant-available across a wider pH range than unchelated mineral salts, which lowers the risk of a micronutrient lockout in the root zone during bloom.

A grower sampling the 3-part system on one or two plants before scaling up usually starts with the 1-quart size.

Key Features & Benefits

• Bloom-phase N-P-K ratio — phosphorus and potassium weighted for flowering and fruiting development.
• Complete flowering mineral set — nitrogen, phosphorus, potassium, calcium, magnesium, and sulfur in a single bottle.
• Chelated trace elements — iron, copper, manganese, and zinc stay available across a wider pH range.
• Independent mixing ratio — adjust Bloom relative to Grow and Micro at each stage instead of using one fixed blend.
• Built for the 3-part system — designed to be mixed with Emerald Harvest Grow and Micro, not used alone.

Who Should Use Bloom

Bloom fits growers who want to fine-tune their feeding ratio through the vegetative-to-flower transition and across the bloom cycle rather than run a single fixed blend. It's built for any high-yield flowering crop in soil, coco, or hydroponic media.

About Emerald Harvest Bloom

Emerald Harvest launched its three-part Grow, Micro, Bloom system when the Santa Rosa, California brand introduced its original product line in 2015, and Bloom has anchored the flowering side of that system ever since.

Frequently Asked Questions

What role does Bloom play in the 3-part system?

Bloom supplies the phosphorus- and potassium-forward macronutrient ratio used during the flowering and fruiting phase, mixed alongside Grow and Micro. Because the three formulas ship separately, growers raise the Bloom ratio and lower Grow as plants move from vegetative growth into flower.

How do I mix the three components together?

Dilute Micro into the reservoir water first, stir well, then work in Grow followed by Bloom, mixing thoroughly after each one. Following that Micro-Grow-Bloom order keeps the concentrated mineral salts from reacting before they're fully diluted.

What micronutrients does Bloom include?

It provides chelated iron, copper, manganese, and zinc in addition to calcium, magnesium, and sulfur. The chelated form keeps those trace elements available to the plant across a wider pH range than unchelated mineral salts.

Can Bloom be used on its own without Grow and Micro?

No, Bloom is one component of the 3-part system and isn't formulated as a complete standalone nutrient. It's intended to be mixed with Grow and Micro so the full macro- and micronutrient profile is covered.

When should the Bloom ratio be increased in a feeding schedule?

Increase Bloom relative to Grow as plants transition out of vegetative growth and into flowering, since that's when phosphorus and potassium demand rises. Micro stays at a consistent ratio through both phases to maintain the micronutrient baseline.