What is the perfect pH for cannabis and how to adjust it

Updated: December 5, 2021

When it comes to growing (anything), the pH of soil plays an important role. So, we're going to explain to you what's the perfect pH for cannabis and how to fix any soil to have that perfect pH value.

Perfect pH value for cannabis

pH values go from 1 to 11, where 1 is the most acidic and 11 the most alkaline. Cannabis plant prefers middle pH values or also known as standard values that vary from 5.5 to 6.5.
Otherwise, if pH value is too high (usually more than 7.5), roots become unable to consume needed substances such as zinc, iron, copper, etc. But when pH value is too low (usually below 5), the roots can no longer access calcium, magnesium, phosphoric acid, etc. And even though the cannabis plant is a very durable plant that tries hard to stay alive, both cases are usually devastating for her.

Soil with perfect pH for cannabis

Woodland soil is considered to have the perfect pH for cannabis but some praise the effects of sandy loam soil as well. That is because sand is good for drainage and loamy soil for nutrients and holding in the needed water.
For whatever soil you decide, just stay away from planting your cannabis plant in entirely sandy soil since it tends to be more acidic and entirely clay soil since it is alkaline.

Fix pH value of any soil

If you don't have access to the perfect soil, you can always fix whatever you find. Firstly, you need to measure what's the exact pH value. This way you'll know for sure whether you're dealing with acidic or alkaline soil.
When doing the low pH substrate correction, you can use flowable lime, hydrated lime or potassium bicarbonate. However, keep in mind that the latter should be handled with extreme caution. And for the soil with high substrate pH correction, you can use acid-based fertilizer, acid water drench or iron drench.
Also, keep in mind that water is a big factor that can affect your pH. Namely, every water, let it be city, pond or river water, each one has a different pH.

Do you want to learn
more about marijuana?

Check out our cannabis education section, where you can read everything from common knowledge to advanced growing cannabis techniques.

Learn more!

Join us

Join our insiders club for monthly motivation, news and presales. We are not going to spam your email box. We are going to send one or two emails per month. We promise they will be valuable.

You may also like

December 5, 2021
What are best known enemies of cannabis plant?

The cannabis plant is not demanding for cultivation, it withstands modest conditions for the habitat, has few natural enemies, grows quickly and with a large yield. However, we cannot say that he has no enemy. And even these few enemies can make big problems. Let's take a look at what are the most common natural […]

Read More
April 21, 2023
Top 5 cannabis grow lights

Grow lights are essential for providing the right amount of light for the plants to thrive. There are many different types of grow lights available, and choosing the right one can be a daunting task. To help you make the right decision, we have compiled a list of the top 5 cannabis grow lights. These […]

Read More
December 5, 2021
What equipment do I need to start with indoor growing?

So here you are my young padawan. I see you wanna grow some indoor Mary Jane? Don't be afraid it's not as hard as it seems that's why I'm here to calm down your nerves. Before you start your indoor grow you must prepare some things first. Let me show you what you need. Tent […]

Read More
December 5, 2021
Organic growing of cannabis

Two types of fertilizers are commonly used in the fertilizer industry; mineral and organic. What's the difference between them? The origin of the ingredients plays an important role. What happens in the earth when using nutrients? Do they contribute to the growth of the plant? The terminology for fertilizers such as organic, natural, inorganic, chemical, […]

Read More

Leave a Reply