Grotek Cal Max – Calcium and Magnesium Fertilizer with Nitrogen for Indoor and Outdoor Growing
Grotek Cal Max – Calcium and Magnesium Fertilizer with Nitrogen for Indoor and Outdoor Growing
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Tipo: Suplemento nutricional de calcio, magnesio y hierro
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Composición: 2% N, 3% Ca, 1% Mg, 0,1% Fe quelado, 0,68% EDTA
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Medios: Hidroponía, aeroponía, tierra y coco
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Dosis: Riego 1-2 ml/L; foliar 1 ml/L
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Description
Grotek max max It is a supplement that provides calcium, iron and magnesium to your plants. It is ideal to use when it starts from an osmosis water to increase electrical conductivity and to cover deficiencies in your plants.

Full description
Cal-Max from Grotek: A nutritional supplement for healthy and productive crops
Cal-Max from Grotek is a nutritional supplement designed to solve a common problem in crops: lack of calcium, magnesium and iron. During periods of heat and intense growth, plants can suffer from nutritional deficiencies that can negatively affect their production and health.
Cal-Max is formulated to provide the essential minerals that plants need to grow strong and healthy. In addition, its preventive use can help prevent the appearance of problems such as marginal necrosis in lettuce or apical rot in tomatoes.
This additive is compatible with different types of water, such as reverse osmosis and distilled, which often lack the minerals necessary for growing crops. Cal-Max is also easy to use as it is 100% water soluble and will not clog pipes or drippers in automatic irrigation systems.
Additionally, Cal-Max contains only high-quality ingredients and is compatible with different growing media, including hydroponics, aeroponics, soil, and coco. To obtain even faster results, it is recommended to combine its use with a foliar application.
In short, Cal-Max from Grotek is an effective solution for keeping plants healthy and productive during periods of heat and accelerated growth. Its preventive use and easy application make it ideal for growers of all levels.
Instructions for effective use of Cal-Max in your crops
Maintaining a healthy and productive crop requires adequate care of its nutritional needs. To achieve greater production and prevent deficiencies in your plants, Cal-Max is an essential nutritional supplement. Below, we present the instructions for effective use of Cal-Max in your crops, both in irrigation and in foliar application. With these guidelines, you will achieve a healthy and productive crop.
In irrigation:
- Add 1 to 2 ml per liter of water if you do not use an EC meter.
- If you use an EC meter, you must add cal max until the EC rises from 0.3 to 0.6 depending on the state of the plant.
Foliar:
- Add 1ml to a liter of water and spray your plants on both sides of the leaves.
Remember that to spray the plants you should avoid the hours of maximum light or sun exposure. It is preferable to spray the plants once the sun sets outdoors or just after turning off the lights indoors.
Grotek Cal Max Composition
- Total nitrogen (N): 2.0%
- Calcium (Ca): 3.0%
- Magnesium (Mg): 1.0%
- Chelated Iron (Fe) (current): 0.1%
- EDTA (Chelating Agent): 0.68%
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Grotek Cal Max – Calcium and Magnesium Fertilizer with Nitrogen for Indoor and Outdoor Growing
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Frequently asked questions
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Grotek's Cal-Max is a nutritional supplement designed to address a lack of calcium, magnesium, and iron, a common deficiency during periods of heat and intense growth. Used preventively, it helps avoid problems such as tip burn in lettuce or blossom end rot in tomatoes. It's ideal for growers of all levels.
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If you don't use an EC meter, add 1 to 2 ml per liter of water. If you do, add Cal-Max until you raise the EC by 0.3 to 0.6, depending on the plant's condition. Being 100% water-soluble, it doesn't clog pipes or drippers in automatic irrigation systems.
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Yes, for faster results add 1 ml to a liter of water and spray the plants on both sides of the leaves. Avoid the hours of highest light or sun exposure. It's better to spray at sunset outdoors or right when the lights go off indoors.
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Cal-Max is compatible with different types of water, such as reverse-osmosis and distilled water, which often lack the necessary minerals. It also works in different growing media: hydroponics, aeroponics, soil, and coco. It can be used both indoors and outdoors.
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Its composition is 2.0% total nitrogen, 3.0% calcium, 1.0% magnesium, and 0.1% iron chelated with EDTA at 0.68% as the chelating agent. It contains only high-quality ingredients. This provides the essential minerals for strong, healthy plants.
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It's especially useful during periods of heat and rapid growth, when plants can suffer deficiencies that affect their yield and health. Used preventively, it keeps the crop healthy and productive. For even faster results, combine watering with a foliar application.