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Cal-Max by Grotek is a powerful supplement for self-cultivation of cannabis, designed to correct and prevent nutrient deficiencies such as calcium, magnesium, and iron.
Its composition rich in essential minerals strengthens the plants and prepares them for abundant flowering, ensuring optimal and balanced development in any type of growing medium.

Cal-Max by Grotek is ideal for cannabis growers looking to maximize the health of their plants at all stages.
This supplement provides an extra dose of calcium, magnesium, nitrogen, and iron, key nutrients for strong root growth, nutrient absorption, and the prevention of visible deficiencies in leaves and stems.
Suitable for any irrigation system, including hydroponic and aeroponic, Cal-Max by Grotek is 100% soluble and does not clog pipes or drippers.
This product is particularly useful for those using reverse osmosis or distilled water, as it helps raise the EC of the water to optimal levels, improving the plants' ability to absorb the necessary nutrients.
At Hydroponics Blanes, the trusted Grow Shop in Spain, you will find Cal-Max by Grotek with discreet and fast shipping throughout the country.
For best results with Cal-Max by Grotek, follow these dosage and application method instructions:
In irrigation: Add between 1 and 2 ml of Cal-Max by Grotek per liter of nutrient solution. This helps maintain the proper balance of calcium and magnesium, preventing the plant from suffering deficiencies. If you want to adjust the EC of the solution, adjust the amount according to the desired value.
Foliar application: Mix 1 ml of Cal-Max by Grotek per liter of water and spray both sides of the leaves. It is recommended to perform this application in low light conditions, preferably when the lights are about to go out indoors or at sunset outdoors, to avoid burns on the plants.
The composition of Cal-Max by Grotek includes a carefully balanced mix of essential nutrients for the development of your plants:
NPK 2-0-0
This NPK formula helps correct and prevent nutritional deficiencies during all stages of growth and flowering, ensuring that cannabis plants receive the right nutrients at the right time.
The use of Cal-Max by Grotek provides a series of benefits to self-cultivation of cannabis:
Prevention of deficiencies: This supplement ensures proper absorption of calcium and magnesium, essential for cell development and nutrient transport.
Increased resistance: By strengthening the root system, Cal-Max by Grotek helps plants better withstand adverse growing conditions.
Compatibility with irrigation systems: Completely water-soluble, Cal-Max by Grotek is ideal for use in automatic systems such as drip or hydroponic irrigation, with no risk of clogging.
Improves harvest quality: This product enhances the growth of buds and fruits, achieving higher yields in terms of quality and quantity.
Cal-Max by Grotek is a supplement designed to combat nutritional deficiencies of calcium, magnesium, and iron in cannabis cultivation.
Especially useful in reverse osmosis or distilled water, Cal-Max by Grotek adjusts the EC and ensures the absorption of essential nutrients with every watering.
This supplement is formulated to meet basic nutrient needs, ensuring proper root development and helping plants stay strong and healthy at every stage of their life cycle.
You can find Cal-Max by Grotek at Hydroponics Blanes, your trusted Grow Shop in Spain. Our team offers personalized attention and discreet shipping, ideal for those seeking discretion and professionalism in their purchases of Grotek Fertilizers products.
With our service, you can be sure that products for self-cultivation of cannabis will arrive on time and in perfect condition.
Cal-Max by Grotek is an essential supplement for any cannabis grower, with a balanced nutrient formula that prevents deficiencies and promotes optimal plant development.
Suitable for various cultivation systems and compatible with other Grotek products, this supplement provides additional support at critical stages, ensuring that plants absorb all the essential nutrients for a plentiful and high-quality harvest.