EC (electric conductivity), or electrical conductivity serves us nutrient control in solution. Here again, the more nutrients the higher the EC value. In progress keymentit is advisable to observe EC within 0.6 - 0.8 mS / cm 3, this value should be raised to a level 1.9 - 2.1 mS / cm 3in the final phase inflorescence . It is important in the last 14 days of flowering flushthe roots of the plant with clean water so that the water flowing from the plant has an EC value of pure water at the end. However, this is often very difficult to achieve.

Takýmto way can be easily achieved amount of nutrients for proper plant development. Before each watering, it is important to check the EC content of the solution and then the excess liquid from the pot and the EC liquid that has leaked out. Both of these values can then be easily compared and accordingly either EC value different preparations in the dressing raise or reduce.

What is the good value of EC for?

As mentioned above, different situations can occur:


If the EC effluent solution is higher than the EC value poured into the substrate with the plant, the cultivated plant is over-fertilized. At this point, it is important to reduce EC watering and increase its water intake so that the flowing EC value reaches the required quality.

The fertilized plant can also be recognized by the fact that the leaves around the buds rotate downwards and their edges slowly die.

Ideal state

EC dressings and EC effluents are approximately the same. Therefore, there is no need to change anything and keep the regular watering as it has been.

Insufficient fertilization

In the event that EC plant leakage from the plant is less than EC dressings, it is necessary to increase the nutrient supply (fertilizer).

The only disadvantage of this EC test is that if water is insufficient, the plant prefers water from nutrients , and therefore the EC effluent will be higher. Therefore, it is important to ensure sufficient income moisture .

Mladé rostliny konopí v substrátu.

Healthy cannabis plant in the right substrate.

Suitable EC value in substrates

Pre point out that manufacturers are generally marketed already BCedhnojenésubstrateswith a balanced ratio of nutrients, microorganisms and impurities. Mostly they offer classic 2 types:

  • less pre-fertilized (EC values about 1.2 / pH 6.1-6.3), suitable for young plants that do not consume as much nutrients and are a prerequisite for transplanting them or for maternity plantswhere it is important to maintain rather lower and more stable nutrient values
  • More pre-fertilized (EC values around - 2.4 / pH 6.2-6.6), suitable for growing plants throughout life in one pot - guarantees enough nutrients for up to 6 weeks. It is also used as a transplanting substrate for larger plants

EC is an important value determining the proportion of plant-borne nutrients, so it is important to check it regularly. We use EC meters to measure EC.