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Cal-Max by Grotek is an essential supplement for self-cultivation of cannabis, designed to prevent and correct calcium, magnesium, and iron deficiencies in plants.
Its balanced and fast-absorbing formula strengthens the overall health of the plant and optimizes flowering.

Cal-Max by Grotek is specifically formulated to provide essential nutrients, including calcium (Ca), magnesium (Mg), and iron (Fe), which enhance the growth and productivity of your cannabis plants.
This supplement is compatible with a wide variety of growing media such as soil, coco, hydroponics, and NFT, and is ideal for growers using reverse osmosis or distilled water, as it allows you to adjust the EC of the water to the necessary levels to maintain optimal plant development.
Additionally, Cal-Max by Grotek supports the strengthening of cell structure, photosynthesis, and overall metabolism, thus promoting the creation of denser buds and greater resin production.
At Hydroponics Blanes, your trusted Grow Shop in Spain, we offer Cal-Max by Grotek with discreet shipping and a dedicated service to help you achieve the best results.
For best results with Cal-Max by Grotek, follow the dosage instructions for effective use at different stages of cultivation:
In irrigation: Add 1 to 2 ml of Cal-Max by Grotek per liter of nutrient solution from the beginning of growth until the end of flowering. If you monitor the EC of your nutrient solution, you can adjust the amounts to reach the desired levels.
Foliar application: Dilute 1 ml per liter of water and spray both sides of the leaves with a sprayer. It is important to apply in low light conditions, just when the lights go out in indoor crops or at sunset outdoors, to prevent the plants from suffering burns.
The composition of Cal-Max by Grotek includes the key nutrients that plants need to thrive, especially during rapid growth and flowering stages:
NPK 2-0-0
This combination offers a perfect balance for cannabis plants, maximizing development and maintaining proper nutrition at all stages.
Regular use of Cal-Max by Grotek provides numerous benefits that directly impact the quality and yield of your cannabis crop:
Prevents and corrects deficiencies: Cal-Max by Grotek provides the nutrients that may be lacking in reverse osmosis or distilled water, helping to maintain a nutritional balance in each irrigation and avoiding visible deficiencies.
Improves root development: The calcium and magnesium in Cal-Max by Grotek strengthen the roots, which increases the capacity for nutrient absorption and improves the overall health of the plants.
Boosts flowering and bud development: Cal-Max by Grotek ensures that plants have the energy and structure to form larger and denser buds, with greater trichome production.
Compatible with any irrigation system: This supplement is fully water-soluble, so it adapts perfectly to drip irrigation systems, hydroponics, NFT, and other methods without risk of clogging.
Enhances aroma and flavor: By improving overall health and nutrition, this product allows the plant to better express its aromatic and flavor profile, directly benefiting the quality of the final product.
Cal-Max by Grotek is a nutritional supplement designed to cover critical nutrient deficiencies in cannabis crops, mainly when using reverse osmosis or distilled water.
Its formula rich in calcium, magnesium, iron, and nitrogen has been developed for intensive growth, promoting the overall health of the plant and ensuring that the crop maintains an adequate nutritional balance for optimal development at each stage, from vegetative growth to flowering.
Cal-Max by Grotek can be applied by irrigation or foliar spraying, allowing versatile use for all types of growers and growing media.
If you are looking for a Grow Shop in Spain with Grotek Fertilizers products and a discreet shipping service, Hydroponics Blanes is the ideal option.
We are a trusted Grow Shop and have a wide range of products for self-cultivation of cannabis, also providing advice so you can find the most suitable fertilizers and supplements for your specific cultivation needs.
Cal-Max by Grotek is an effective solution to prevent and correct calcium, magnesium, and iron deficiencies, which are key to the health of your cannabis plants.
This supplement is suitable for any growing medium and adapts to different irrigation systems, allowing healthy growth and vigorous flowering. With Cal-Max by Grotek, you can optimize the yield and quality of your crops, maximizing root development and boosting the production of dense and aromatic buds.
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