- New


SALE PROHIBITED TO PERSONS UNDER 18 - FREE SHIPPING FROM €40 (Mainland Spain only - Max. 25 Kg)
CalMag 1 Kg. Green House is a nutritional supplement designed to reinforce the supply of calcium and magnesium for marijuana in demanding crops. It is very useful in coco, hydroponics, soft water, and indoor systems where nutritional stability makes the difference.

The use of CalMag 1 Kg. Green House helps meet one of the most common needs in modern crops: maintaining a correct level of calcium and magnesium during the development phases. In many cannabis crops, blockages, deficiencies, or imbalances appear due to working with reverse osmosis water, very soft water, inert substrates, or intensive fertilization plans. In this context, this CalMag Green House supplement provides a very practical base to support plant growth, promote tissue formation, and reduce problems caused by the lack of these elements.
The water-soluble formulation allows for quick dissolution and precise application both in fertigation and in hydroponics or foliar spraying. Thanks to this versatility, it becomes a very interesting option for those looking for a CalMag powder fertilizer that is easy to integrate into different nutrition programs. In addition, it can be used together with other brands, which greatly expands the possibilities of use within a technical crop. For those looking for a reliable product to reinforce mineral balance, Green House Feeding CalMag is an alternative to seriously consider.
In indoor cultivation, where the growth rate is usually faster and the margin for nutritional error is narrower, a product with these characteristics is especially useful. The proper supply of calcium helps strengthen plant structure and improve resistance to stress, while magnesium is directly involved in essential processes related to photosynthesis. That is why talking about CalMag for indoor cultivation means talking about stability, prevention, and constant support in phases where plants need well-adjusted nutrition.
CalMag 1 Kg. Green House is used to correct or prevent calcium and magnesium deficiencies in cannabis crops and other high-yield plants. These types of deficiencies can manifest as weakened leaves, irregular growth, problems in structural formation, spots, loss of vigor, or difficulty maintaining uniform development. In many cases, these deficiencies appear when growing in coco, with rainwater, reverse osmosis water, or hydroponic systems where the mineral base of the water is limited.
It is also useful as continuous support within more complete nutrition programs. It is not always used only when there is a visible problem; in many crops, it is added as a preventive measure to maintain a more stable nutritional environment from the start. This is especially interesting in facilities with powerful lighting, high growth rates, or very demanding varieties. As a CalMag for coco and hydroponics, it fits especially well in systems where the grower needs precision and quick response.
Another important point is that it allows you to complement fertilization programs along with products such as Hybrids, Short Flowering, Long Flowering, and Booster. In this way, the crop maintains a more solid base in vegetative and reproductive stages. For those looking for the best CalMag for cannabis in a soluble and easy-to-prepare format, this product offers a very interesting proposal both for its composition and ease of use.
The composition of CalMag 1 Kg. Green House is designed to provide essential nutrients quickly and cleanly. The formula includes total nitrogen 13.5%, of which 13.1% corresponds to nitric nitrogen and 0.4% to ammoniacal nitrogen. It also provides calcium oxide CaO 16.7% water-soluble and magnesium oxide MgO 6.0% water-soluble. In terms of conductivity, it offers a reference of EC 1.2 mS/cm with 1 g/l, a useful figure for adjusting nutrition more precisely.
One of the most valued aspects of this formulation is the absence of chlorine, sodium, and heavy metals, which allows you to work with a clean and efficient nutrient solution. This is especially interesting in delicate crops or in recirculating systems where the accumulation of unwanted elements can cause problems in the medium term. For this reason, CalMag 1 Kg. Green House not only works as a corrector but also as regular support within well-designed fertilization programs.
The powder format facilitates storage and allows you to prepare from small doses for domestic use to mother solutions for dosing systems such as Dosatron or Netafim. This flexibility means that the product fits both in small grow tents and in larger facilities that need organized and repeatable fertigation routines.
The method of use for CalMag 1 Kg. Green House is simple: it is dissolved in water and the dose is adjusted according to the type of water, crop phase, and specific need. The general recommendation is between 0.1 and 0.5 g per liter of water. When working with soft water, rainwater, or reverse osmosis water, you can add 0.5 g/l, reaching around 0.6 EC. In hard water or rich soils, the recommended dose drops to 0.2 g/l, with an approximate frequency of 1 to 2 times per week, although it is not always mandatory.
For foliar application, the indicated guideline is 0.2 g/l every 10 days, only when there is a calcium or magnesium deficiency. It is also possible to prepare a mother solution, with a recommended dilution of 10 to 15 kg per 100 liters of water, ideal for facilities with automatic dosing systems. It is advisable to use an EC meter to fine-tune the mixture and maintain more precise fertilization.
It is important not to mix this product with another calcium additive. In addition, there is the option to stop using CalMag in week 6 and switch to a chelated calcium supply if you want to stop adding nitrogen and continue reinforcing only calcium until the end of the cycle. This possibility is very useful in crops where the nutrition plan is adjusted in detail during advanced flowering.
Among the main advantages of using CalMag 1 Kg. Green House in indoor cultivation is the speed of response in systems where plants grow intensely and any deficiency becomes visible in a short time. A good supply of calcium and magnesium promotes more stable growth, better plant structure, and a stronger response to stress situations. This is especially noticeable under powerful LED lighting, in coco, and in hydroponics, where mineral balance needs more attention.
Another important advantage is the versatility of the format. It can be used in irrigation, hydroponics, foliar spraying, and automatic dosing systems. In addition, it works well as a standalone product, which allows it to be integrated into very different fertilization plans. For many growers, this flexibility makes buying CalMag 1 Kg Green House a practical decision when looking to have an efficient corrector always available in the grow area.
The CalMag 1 Kg. Green House price may vary depending on promotions, stock, and store conditions, but the one-kilo format is interesting for those looking for performance, ease of storage, and many applications per package. Within the mineral correctors category, it represents a very useful alternative to keep the crop well balanced for weeks.
If you need to buy CalMag 1 Kg Green House, at Hydroponics Blanes you can find this product within a catalog aimed at technical cultivation. As a trusted Grow Shop and online grow shop, it offers solutions for nutrition, crop control, hydroponics, coco, and accessories for indoor cultivation. In addition, having a specialized store makes it easier to choose the right product according to the type of water, substrate, and fertilization program.
Buying at Hydroponics Blanes allows you to access specialized attention, products aimed at the demanding grower, and discreet shipping
Customers who bought this product also bought: