Advice for Watering Outdoor Cannabis

By Robert Bergman,

Typically, any other problems having to do with water will be related to pH The problem will go something like this: the soil has a nutrient deficiency, so you attempt to remedy the situation by doing something like adding Epsom salts or worm castings, or you mix in a balanced organic nutrient mix with your watering regimen. After about a week, the soil PH levels begin to rise (soil is less acidic) but the plant’s problem is still apparent. Concerned, you add more nutrients either directly to the soil, or in a tea and the problem only seems to get worse, (the PH drops).

In cases like this, it is probably the water that is the problem, and so, before you completely lose your mind, be sure to test the water. Most major municipalities chlorinate their water to kill bacteria harmful to humans. This water should never be used when you are germinating marijuana seeds or flowering your plants, and if you must use it when your marijuana plants are in the vegetative growth stages you should let it sit for at least twenty-four to forty-eight hours so that the chlorine can evaporate. Chlorine is very acidic and, once added, it can lower the PH levels in the soils preventing the absorption of whatever nutrient or supplement you are trying to add.


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