Emerald Harvest King Kola (0.3 – 2 – 3) – 1 Gallon

Emerald Harvest King Kola (0.3-2-3) is a liquid bloom booster designed to produce bigger, denser flowers and heavier harvests. Formulated with elevated phosphorus and potassium levels, and fortified with nitrogen derived from hemp seed flour — a hydroponics industry first — King Kola supplies the core elements crops need during the flowering stage to drive rapid bud development beyond what base nutrients alone can achieve.

King Kola Specifications

All values reflect the 1-gallon (3.8 L) packaging of Emerald Harvest King Kola. NPK and formulation details are derived from product labeling and manufacturer documentation.

Specification	Value
Brand	Emerald Harvest
Product Name	King Kola
NPK Ratio	0.3 – 2 – 3
Volume	1 Gallon (3.8 L)
Weight (packaged)	10.0 lb
Formulation	Liquid concentrate
Nitrogen Source	Hemp seed flour (natural, organic-derived)
Product Type	Bloom booster / Flowering additive
Category	Nutrients & Additives — Growth & Bloom Boosters
SKU	EMHKKG

Why Choose King Kola

King Kola occupies a clear role in a flowering-stage nutrient schedule: it delivers the phosphorus and potassium load that promotes dense bud formation, while adding a nitrogen fraction that keeps foliage from stalling during peak flower development. Several characteristics separate it from generic bloom additives:

• High phosphorus and potassium (0.3-2-3 NPK): The elevated P and K values in King Kola are calibrated to accelerate budding. Phosphorus supports the energy transfer reactions that drive flower initiation, and potassium regulates water uptake and nutrient transport at the cellular level. Using both together at flowering-stage concentrations helps buds build mass more efficiently than relying on a base nutrient program alone.
• Hemp seed flour as a nitrogen source: Emerald Harvest sources the nitrogen fraction in King Kola from hemp seed flour rather than synthetic nitrate or urea salts. Hemp seed flour is a complex, slow-releasing organic material that contains not just nitrogen but a range of metabolic compounds and trace elements. According to Emerald Harvest, no other hydroponics supplement on the market used this ingredient at the time of formulation — making King Kola a genuinely distinctive product rather than a reformulation of existing bloom-booster recipes.
• Additive, not a replacement for base nutrients: King Kola is designed as a flowering-stage supplement to be layered on top of a complete base nutrient program. Growers are not expected to rework their existing feeding schedule — they add King Kola during the transition into bloom and adjust as the crop responds.
• Liquid concentrate format: The liquid formulation mixes quickly into reservoir water or foliar spray solution without the clumping or sediment that can occur with powdered bloom boosters. At one gallon, the bottle size is practical for both small-scale home grows and larger commercial reservoirs where a single gallon may last several weeks at standard dose rates.
• Part of a coordinated Emerald Harvest line: King Kola is built to work alongside the rest of the Emerald Harvest nutrient system, including their base three-part and two-part programs. Growers already using Emerald Harvest base nutrients can introduce King Kola without compatibility concerns or nutrient antagonism.

Best Uses for King Kola

King Kola is most effective when used during the flowering and fruiting stage of plant development. The following use scenarios reflect how growers typically deploy this product:

• High-density flowering crops in hydroponic systems: Crops grown in deep water culture, nutrient film technique, or recirculating drip systems reach maximum bud density when phosphorus and potassium availability stays high throughout the flower window. King Kola provides a concentrated P-K boost that can be dialed into reservoir EC targets without overloading with nitrogen. For growers using a nutrient conductivity meter to track feed strength, adding King Kola is straightforward — dose, measure, adjust.
• Coco coir and soilless media: Plants grown in coco coir or perlite-based mixes have no native nutrient reserve to draw from during flowering. A liquid bloom additive like King Kola fills the P-K gap that a base nutrient program alone may not fully address in the late-bloom window, particularly in runs where heavy feeding has been maintained throughout the vegetative phase and roots are already well-established.
• Soil and amended media grows seeking a late-bloom supplement: Even in amended soil, phosphorus availability can become limiting during peak flower development — especially in containers where organic breakdown has consumed readily available P. King Kola can be watered in to supplement depleted soil at the onset of visible bud swelling.
• Growers combining organic nitrogen inputs with synthetic mineral P-K: The hemp seed flour nitrogen in King Kola makes it a useful bridge product for growers who want some organic-derived inputs in their program without switching to a fully organic nutrient line. If you already use inputs like Earth Juice Hi-Brix Molasses as a carbohydrate supplement, King Kola can complement that approach during bloom without introducing hard-to-dissolve organic solids.
• Reservoir-based programs with automated dosing: Because King Kola is a liquid concentrate, it integrates cleanly with dosing pump systems that inject nutrients into a reservoir on a schedule. The formulation does not require pre-mixing or special handling beyond the standard shake-before-use step common to concentrated liquid nutrients.

King Kola vs Similar Bloom Boosters

The bloom booster category is crowded, and most products in it lead with phosphorus and potassium as their main selling points. King Kola occupies the same functional space — it is a high-P, high-K liquid additive for the flowering stage — but differs in its nitrogen source. Where most bloom boosters either contain no nitrogen or derive it from conventional ammonium or nitrate salts, King Kola uses hemp seed flour as its nitrogen source. Hemp seed flour is an organic material that carries trace elements and metabolic compounds alongside its nitrogen content, which means the product delivers minor-element support beyond the three headline macronutrients on the label.

Growers evaluating King Kola against other mid-range bloom boosters should weigh a few practical considerations. First, the 0.3-2-3 NPK positions this product as a moderate-phosphorus, moderate-potassium supplement — it is not an extreme P-K spike product. This makes it easier to use without creating excessive nutrient salt buildup in the root zone. Second, the liquid format and well-known Emerald Harvest brand means widely documented feeding schedules and community-tested dose rates are available. Third, for growers already running the Emerald Harvest three-part base program, King Kola is the logical flowering additive because it was formulated to work within that system’s EC targets and pH windows.

If you are also evaluating root biology supplements to support plant uptake during bloom, products like Advanced Nutrients Tarantula (a microbial inoculant) address a different part of the feeding system and can be used alongside a bloom booster like King Kola without conflict.

Compatibility

King Kola is a liquid nutrient additive compatible with a broad range of growing systems and media. The following compatibility notes are derived from the product category, formulation type, and manufacturer-published information:

• Growing systems: Compatible with hydroponic systems including deep water culture (DWC), nutrient film technique (NFT), ebb and flow / flood-and-drain, and recirculating drip systems. Also suitable for hand-watering coco coir, peat-based, and amended soil grows.
• Base nutrient programs: Designed as a supplement to a complete base nutrient program, not a standalone feed. Works within the Emerald Harvest nutrient system; also compatible with other complete base programs when added at the supplement rate during the bloom phase.
• pH range: As with most hydroponic nutrients, King Kola should be added to water that has been pH-adjusted to the appropriate target range for the growing medium — typically 5.8–6.2 for hydroponics and coco, and 6.0–6.8 for soil.
• EC considerations: Because King Kola adds nutrient load to the solution, its contribution to overall EC must be accounted for when targeting a feed-strength range. Growers should measure EC after adding all nutrients and supplements before feeding.
• Other Emerald Harvest additives: King Kola is part of the Emerald Harvest additive lineup and is formulated to be stacked with other products in that line. For root-zone support alongside King Kola, some growers also incorporate beneficial microbe products — for instance, a root inoculant such as Heavy 16 Roots supports root health and nutrient uptake capacity in large-scale reservoir systems.

Dosing Guidelines

King Kola is a concentrated liquid bloom booster. The following dosing approach reflects standard practice for this category of product; consult the Emerald Harvest feeding chart for strain- and system-specific rates:

• When to start: Introduce King Kola at the onset of the flowering stage, once the plant has clearly transitioned from vegetative growth and bud sites are forming. Continuing use through mid-to-late bloom until the flush window is the common practice with bloom boosters.
• How to dose: Shake the bottle well before measuring. Use a calibrated syringe or measuring cup to draw the manufacturer-recommended volume per gallon or litre. Add King Kola to the reservoir or feed water after the base nutrients and before final pH adjustment.
• Mixing order: Add base nutrients first, then additives such as King Kola, then any pH adjustment. Always mix into a full volume of water — never add concentrate to concentrate.
• EC monitoring: After adding all nutrients and supplements, check the solution EC with a calibrated meter. Compare against the target EC for the current growth stage and the plant species. If EC is above target, dilute with plain water before feeding.
• Pre-harvest: Transition away from bloom boosters during the flush or final-feed window, as most finishing protocols call for reduced or zero supplemental nutrients in the last 7–14 days before harvest. A product like King Kola is not intended for use during the flush phase.

How to Use King Kola

1. Confirm growth stage. Begin using King Kola once the plant has entered the flowering stage and bud sites are visibly forming. Do not use during the vegetative stage or the flush window.
2. Shake the bottle. Shake or stir the concentrate thoroughly before each use. Liquid formulations can develop concentration gradients when stored.
3. Measure the dose. Use a calibrated syringe or measuring cup to draw the manufacturer-recommended volume per gallon or litre of feed water. Refer to the Emerald Harvest feeding chart for the specific rate for the current week of bloom.
4. Add to reservoir or feed water. Fill your reservoir or mixing container with the target volume of fresh water. Add base nutrients first (Part A, then Part B if applicable), then add King Kola, then any remaining additives.
5. Mix thoroughly. Stir or circulate the solution until fully blended. Do not leave concentrates sitting unmixed at the surface.
6. Check EC. Use a calibrated EC or TDS meter to verify the total nutrient concentration of the solution. Adjust with plain water if EC is above target, or add more base nutrients if EC is below target for the growth stage.
7. Adjust pH. Use a pH meter and appropriate pH Up or pH Down to bring the final solution to the target range for your growing medium (5.8–6.2 for hydro/coco; 6.0–6.8 for soil).
8. Feed as normal. Deliver the solution to your plants according to your standard irrigation schedule. Monitor plants over the following days for signs of nutrient response and adjust dose in the next reservoir change if needed.

Sources & Further Reading