BlueGold® C4 Calcium (OMRI Listed) – BlueGold® by Eden Solutions

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BlueGold® C4 Calcium (OMRI Listed)


BlueGold® C4-Calcium is for foliar use to see immediate Calcium uptake via Apical’s Plant Sap PPM Test. BlueGold® Cal-King is the super-concentrated version of BlueGold® C4-Calcium for fertigation.

All Eden BlueGold® Solutions are 100% formulated, made, and manufactured in America by a family-founded, owned, operated, and Veteran-led business.

For more information on BlueGold® Oil-Sil, please call us at 1-307-275-7010 or email
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OMRI CERT: Download

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BlueGold® C4-Calcium is an extreme form of our BlueGold® Cal-King in micronization, but BlueGold® Cal-King is more potent regarding Calcium availability. Agriculture is a unique form of labor that is limited the same as all others: time and budget. Inputs dictate the available nutrients, and when dealing with excesses (i.e., Magnesium, Potassium, Na Sodium, Chlorides, Sulfur, Iron, Aluminum, etc.) that lock out an extremely vital nutrient like Calcium. Yields do not have 1 to 3 or more years to wait for nature to take its course to process a dry input of Aragonite. In these cases, working in fertigation and foliar applications of nutrients like Calcium via BlueGold® C4 or Cal-King can drive the plants to success while the soil is being corrected. The third limiting factor unique to farming is nutrient emergencies.

You can be in the final stages of a grow cycle, but the sap desperately needs a boost in PPM of Calcium. In such emergency cases, a farmer needs to be able to supply Calcium in a small amount directly to the plant without changing the soil PPMs. Enter BlueGold® C4-Calcium as an extremely micronized Calcium source – below 2 microns. A blood cell is 8 microns, and BlueGold® Cal-King is 10 microns. This source of Calcium can be applied directly to a plant to meet emergency needs without affecting soil PPM of Calcium. Due to its extreme micron size, the Calcium in C4-Calcium can immediately enter a plant’s stomata in a bioavailable form.

BlueGold® C4-Calcium, although rarely used, is an excellent tool to have. If plant Phosphate PPMs are proper, C4-Calcium can be used to quickly adjust the Calcium PPMs in the plant during critical growth stages.



For best results, this product must be used in conjunction with a proper Soil and Sap Test Analysis and applied according to test results for the crop type, crop height, and PPM change required. Properly balancing nutrients by simultaneously lowering all excess and raising all deficient nutrient PPMs is critical to long-lasting beneficial results in any crop.

Depending on the Calcium PPM change needed, possible rates are as follows: If by foliar, 1 to 18 fl. oz. per acre with a minimum of 21 gallons of water. A non-guaranteed general use recommendation of this product in foliar applications per acre basis is 1oz per one foot of crop height for a desired plant sap movement of 1 PPM. If by fertigation injection, 1 to 9 fl. oz. per acre. If by aerial, 32 fl. oz. per 5 gallons of water used per acre. If by pivot or wheel line, apply at 100% ground speed, then resume normal ground speed watering. It can be applied in all weather conditions, including rain and extreme heat. The best spray time is early morning when dew is present. Rates subject to excesses, i.e., salts, chlorides, metals, sulfur, etc.



BlueGold® C4 Calcium is an OMRI-listed Input (please contact your certifier before use). Rates depend on the PPM change needed. We recommend Apical Crop Science Soil and Sap testing. 

Do not use with synthetically enhanced or grow media with excesses of Na Sodium, Chlorides, Aluminum, Sulfur, Magnesium, Potassium, NO3/NH4, Iron, and Boron with BlueGold®. We strongly recommend avoiding ocean-based products high in Na Sodium, Chlorides, and other salts with our Solutions and Sulfur-based products, salt, and heavy metal humus, manures (primarily commercial), and composts (especially mushroom, dead animal, etc.), etc. These inputs are upside down with excesses. The BlueGold® Grow System is based on balanced Nutritionals. By itself, BlueGold®, at recommended rates using Apical Testing, will not harm ANY crop, plant, biology, system, human, animal, environment, pollinator, or beneficial (including birds, butterflies, earthworms, etc.)Do NOT combine with pesticides/chemicals/plant cleaners/etc. Very recent or current use of chemicals like fertilizers, herbicides, fungicides, algaecides, bactericides, miticides, pesticides, biocides, fumigants, plant growth regulators, pH Up/Down chemicals, dyes, etc., – all can cause an unfavorable interaction due to the Wetting Agent properties of BlueGold® Solutions, which can magnify the strength of said chemical. Strengthened doses of those chemicals can result in direct stress, burning, or death of plants. BlueGold® Solutions by themselves, at recommended rates, without chemical interactions, will never cause these issues in any plant or soil (when used as directed)Users must respect BlueGold® labels and manufacturer warnings to not combine with chemical/synthetic/excess element inputs by +/- 90%. It is the user’s choice against our directions/recommendations. If you encounter problems in the plants from the previously mentioned by your choice, STOP. If you quickly move the pH to 6.4 with the help of pH adjusters, without adjusting inputs, you’re drastically making inputs more available, which results in stressed, burned, or dead plants from too big of a hit from the nutrients that are now available at a much higher % than previously. This is especially true when all the chemical/synthetic/excesses stored up flood the plants at even higher EC/PPM values. Likewise, if you do not adjust inputs while using BlueGold®, as soil/sap pH is driven to 6.4, the same can happen over an extended period depending on soil and watering conditions. Store in a cool place.

As the manufacturer, we offer a 100% Guarantee when used as directed, within the Eden Guaranteed Grow Program. A limited guarantee restricted to exclusive use with BlueGold® products and systems subject to the Apical soil, sap, water testing conditions, and Postal damages. No warranty or fitment of purpose promised.

Weight 17 lbs
Dimensions 7.2 × 5 × 10.6 in

32oz, 1/2 gallon, 1 gallon, 2.5 gallon, 60 gallon, 120 gallon, 180 gallon, 240 gallon


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