marijuana grow soil ph

Marijuana grow soil ph

By adjusting the pH of the water you use for your plants, you’ll also adjust the pH value of the soil where the water ends up.

Tests are available at your local garden centre. Tests come in the form of strips, drops, or pens. Simply add some soil or water to the test tube. In some cases, you need to add chemicals. pH can also be measured using strips that change colour as acidity rises. These tests give fairly accurate indications of pH values.

Acidity decreases as the number rises, where 7 indicates a neutral pH value. If acidity does not correspond with the plant’s preferences, nutrient uptake is disrupted. High pH levels often cause deficiencies in manganese, boron, and phosphorus. If pH levels drop too low, plants will develop deficiencies for all nutrients. In order to keep your plants healthy, regular checks of soil and water pH levels are necessary.

Adjusting Water pH Value

As you’ve seen, the right pH value is essential for making the most out of your cannabis plants. Good nutrient uptake requires careful monitoring of soil and water acidity. For more information on choosing the right type of soil for your cannabis seeds, check out this article. If you feel you know enough to get growing, hop right over to our seeds catalogue and have a go!

Do you keep track of your soil and water pH levels for your cannabis plants? The pH value (acidity) is a critical factor. A lack of balance here can prevent your cannabis plants from absorbing the amount of nutrients they need.

Testing pH Value

pH is measured using a scale that runs from 0 to 14.

Aside from organic products, you can also use chemical agents to adjust pH levels. These products are called pH Up and pH Down. They’re available at your local nursery or garden centre. You don’t need to use much, and it works rapidly.

Marijuana grow soil ph

A lot of growers don’t have the time or space to mix up their own soil, which may involve amending, understanding how micro-organisms in the soil affect nutrient absorption, maintaining a compost pile, etc. Because growing in soil can involve a lot of prep work (or for those who live in a city where there’s not enough room for an organic, composted soil grow), there are hundreds of liquid nutrients which can be much more convenient for cannabis gardeners.

Many pH Control Kits come with pH Up & pH Down included. Even though they’re often sold by “General Hydroponics,” these kits work great for soil in addition to hydroponic applications.

Everything is fine, should I worry about pH?

Common pH Problems

If pH is too low, add a small amount of “PH Up” solution to your reservoir. Return to reservoir and check pH again in a few minutes.

2.) If pH at Root Zone is Off, Adjust the pH

However, some cannabis growers do add lime to their flowering cannabis plants grown in soil to help buffer the pH and keep the pH from dropping. When adding lime in the middle of a grow (after you’ve established that there’s too-low ph in the soil) do not add more than 1 teaspoon (5 ml) per gallon of soil.


How much pH Up/Down do I add?