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best water for growing cannabis

The hardness of tap water also varies, yet it is often too hard for cannabis plants. This may mean that it needs to be purified in order to remove excess salts – something that can be achieved using a reverse osmosis system, carbon filtration or distillation.

Another factor that needs to be considered is water hardness, which refers to the level of dissolved calcium and magnesium salts. Solutions that contain more than 200 milligrams of these salts per litre are considered hard water, while soft water contains less than this concentration.

Distilled water and bottled water can also be purchased, both of which are free of salts and generally have a pretty neutral pH. In some cases, though, it may be necessary to add small amounts of calcium in order to slightly increase the hardness.

Cannabis generally grows best when the pH of its environment is roughly neutral, with a pH of between 6 and 7 being ideal. If the water that cannabis plants are fed falls outside this range then it can inhibit the uptake of certain vital nutrients. Iron, for instance, is less soluble in alkaline solutions, which means that plants may be unable to access this key mineral if the pH of their water is too high.

How Water Affects Cannabis

A number of water sources can be used for cannabis cultivation, although several variables may need to be adjusted in order to make it suitable for your plants. Tap water, for example, is often slightly alkaline, with a pH of between 8 and 9 – though this will vary from location to location.

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It goes without saying that water is vital for the growth of plants, although when it comes to cannabis, not all water is equal. To produce high-quality bud, plants need to be able to absorb nutrients from the soil, yet the make-up of the water that reaches a plant’s roots can have a major impact on its ability to do so. After all, water is the vehicle through which nutrients and oxygen travel through a plant, so getting this component right is pretty important.

It’s therefore sometimes necessary to increase the acidity of tap water by adding a small amount of a ‘pH Down’ solution, which generally contains substances such as phosphoric acid or sulphur. Litmus paper strips can be used to check the pH of your water and determine when the optimum range has been reached.

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Rain water, on the other hand, is typically much softer than tap water. It also has a lower pH than tap water, which means it often doesn’t need to be adjusted before being fed to cannabis plants. However, if rain water is too acidic then it may be necessary to add lime, wood ash or a specially formulated ‘pH Up’ solution in order make it more alkaline.

Conversely, cannabis plants struggle to absorb magnesium when the pH of the water they receive is too low. It’s therefore essential to ensure that the water you use for your cannabis plants is of a suitable pH, as nutrient deficiencies can have a major impact on the quality of the bud that you end up with.

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Best water for growing cannabis

Tap water is probably one of the most used types of water when it comes to watering cannabis, as it’s definitely the easiest to access. Whether you should use this type of water or not depends on where you live, as the water in certain areas has different characteristics than others. You should be able to check this at the town hall or through town officials Tap water can be hard, (EC + 0.8), medium (EC + 0.4) or soft (EC – 0.4), and it generally has a pH of over 7.0 as well as containing a lot of products that help keep it clear. Tap water also contains lime, chlorine and fluoride in some cases, which can kill natural life in soil and decrease its quality.

Tap Water

In order to guarantee quality flowers and to make the most out of the nutrients used, the most important thing is to make sure that you know the type of water you’re going to use, and its contents. Secondly, you’ll need to work using specific pH and EC levels so that your plants can absorb everything they need; these levels vary depending on the phase your plants are in and depending on the strain grown. This is why you absolutely need pH and EC meters when growing cannabis, although this post is more about different types of water and how they can be used.

What’s the Best Water for Growing Plants?

We’re going to go through a few different types of water that you can use when growing plants, whether they’re cannabis, flowers, aromatic or decorative plants – many people have misconceptions regarding this issue.

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