How Much Water Does a Cannabis Plant Need?

How much water does a cannabis plant need? It’s a common question with a complicated answer. Learn about the factors that affect a cannabis plant’s water needs.

Checkout this video:


growers often wonder how much water their cannabis plants need. Unfortunately, there’s no easy answer, as the amount of water your plants need will vary depending on factors such as the size of your plants, the type of soil you’re using, the climate you’re growing in, and more.

That said, there are a few general guidelines you can follow to ensure that your plants are getting the water they need. In this article, we’ll discuss some of the factors that affect how much water your cannabis plants need and offer some tips on how to keep them properly hydrated.

The Importance of Water to Cannabis Plants

Water is one of the most important nutrients for cannabis plants . It is essential for the plant’s growth and development. Cannabis plants need water to absorb nutrients, transport them to different parts of the plant, and help with photosynthesis. Without enough water, your cannabis plants will not be able to grow and thrive.

The role of water in the cannabis plant life cycle

Water is one of the most important elements for plant life and plays a vital role in the cannabis plant life cycle. Cannabis plants need water for many different processes including photosynthesis, transportation of nutrients, and resistance to pests and diseases.

While all plants need water to survive, cannabis plants have a particularly high water requirement due to their large leaves and rapid growth rate. A mature cannabis plant can consume up to 10 litres of water per day, so it’s important to ensure that your plants always have access to fresh, clean water.

The amount of water that your plants need will vary depending on the stage of growth they are at. Seedlings and young plants will need to be watered more frequently than mature plants as they are more prone to drying out. You should also be aware that different growing methods (such as hydroponics or soil-less mix) will require different watering schedules.

If you want your plants to thrive, it’s essential that you give them the right amount of water at each stage of their life cycle.

The effects of water stress on cannabis plants

Water is essential for the proper growth and development of cannabis plants. It plays a key role in regulating plant metabolism, photosynthesis, and transpiration. A lack of water can cause leaves to wilt and eventually die. Too much water can also be detrimental, leading to root rot and other problems.

Cannabis plants are particularly vulnerable to water stress during the vegetative stage of growth when they are actively growing and producing new leaves and stems. However, water stress can also occur during the flowering stage, when plants are using water to produce flowers and buds.

Water stress can have a number of negative effects on cannabis plants, including reduced photosynthesis, slowed growth, stunted development, and reduced yields. Plants under water stress are also more susceptible to pests and diseases.

There are a number of ways to prevent or reduce water stress in cannabis plants. Proper irrigation is essential, and choosing the right type of soil can also help reduce the risk of water stress. If you live in an area with high temperatures or low humidity, you may need to water your plants more frequently to prevent them from becoming stressed.

How Much Water Does a Cannabis Plant Need?

Cannabis plants are just like any other plant in that they need water to survive. However, because cannabis plants are often grown in hot and dry climates, they can require more water than other plants. It is important to know how much water your cannabis plant needs so that you can give it the appropriate amount.

Factors that affect water needs

There are several environmental factors that affect how much water your cannabis plants need, such as:
-Climate: Cannabis plants grown outdoors in hot, dry climates will need more water than those grown in cooler, wetter climates.
-Soil type: Plants grown in sandy soil will need more water than those in clay soil.
-Wind: Plants exposed to wind will lose more water through evaporation and will need to be watered more often.
-Humidity: Plants grown in humid climates will need less water than those in dry climates.

You should also consider the stage of growth your plants are in when deciding how much water to give them. Cannabis plants have different water needs at different stages of growth. For example, young seedlings and clones will need less water than mature plants. And flowering plants will need less water than vegetative plants.

Estimating water needs

Cannabis plants are hardy and can survive on very little water, but they will not thrive. A general rule of thumb is to water your plants when the top inch of soil is dry, but this will vary depending on the size and type of pot you’re using, the type of plant, the climate, and a number of other factors. Overwatering is a common mistake made by new growers, so err on the side of caution and don’t be afraid to let your plants go a little bit dry before watering them again.


In conclusion, a cannabis plant needs approximately 22.5 litres of water a week, depending on the size of the pot and the strain of the plant. However, it is important to check the soil regularly to ensure that the plant is not over or under watered.

Scroll to Top