How Often to Water Cannabis

How often to water cannabis? Close-up of a vibrant, fully blossomed feminized cannabis plant, highlighting its delicate pistils and surrounded by a collection of seeds.

Are you unsure of how often to water cannabis plants?

Understanding the factors that affect watering frequency and recognizing the signs of overwatering and underwatering are essential for maintaining healthy plants.

This article will guide you through determining the right watering schedule and provide best practices for keeping your cannabis happy and hydrated.

So, let’s dive in and learn how to water your marijuana plants effectively!

What affects watering frequency?

The water needs of a marijuana plant can vary depending on various factors such as the stage of growth, the size of the plant, the type of soil, and the environmental conditions. When growing cannabis, it’s important to understand that water is essential for the plant’s overall health and growth.

The stage of growth plays a crucial role in determining the watering frequency.

During the vegetative stage, when the plant is actively growing, it requires more water as compared to the flowering stage. In the flowering stage, the water requirements decrease as the plant focuses more on bud development.

The size of the plant also affects how often you should water. Smaller plants with less foliage may require less water, while larger plants with more foliage may need more frequent watering.

As your plants grow, they’ll need more water to support their increased size and root development.

The type of soil in which your cannabis plant is growing can impact the watering frequency. Well-draining soils allow excess water to drain away, preventing waterlogged roots. On the other hand, heavy clay soils tend to hold more water and may require less frequent watering.

Environmental conditions such as temperature and humidity can influence the water needs of your marijuana plants.

Higher temperatures and low humidity levels can cause the soil to dry out faster, requiring more frequent watering. In contrast, cooler temperatures and high humidity levels may result in slower evaporation, reducing the watering frequency.

The type of seeds you use shouldn’t make a difference. Regular and feminized seeds require the same watering frequency based on the growing environment.

Considering these factors will help you determine how often to water your plants, ensuring they receive the right amount of water for growth and health.

How often to water cannabis? Close-up of a vibrant, fully blossomed feminized cannabis plant with delicate pistils, surrounded by seeds, sparking curiosity about their future gender.

What are the signs of overwatering and underwatering?

One of the signs of overwatering is wilting leaves that appear yellowish and droopy. If you notice that the leaves are also falling off easily, it’s a clear indication of too much water. Overwatering can lead to root rot and other diseases, so it’s crucial to address this issue promptly.

Underwatering is characterized by dry and brittle leaves. They may appear brown or crispy, and the plant overall may look weak and dehydrated.

Another sign of underwatering is when the soil feels extremely dry and crumbly to the touch. When this happens, it’s important to give your marijuana plants a good watering.

To avoid both overwatering and underwatering, it’s crucial to understand the needs of your plants. Pay attention to the signs they give you, and adjust your watering routine accordingly. Remember, the goal is to keep the soil moist but not saturated.

If you do end up stressing out your plants through overwatering or underwatering, consider infusing the finished cannabis with honey. At least this way you can still enjoy a potent cannabis treat!

Does growth medium impact cannabis watering?

If you have your plants in a soil-based medium, you should water them when the top inch of the soil feels dry to the touch. However, if you’re using a hydroponic system or a soilless medium, such as coco coir, you may need to water your plants more frequently as these mediums tend to dry out faster.

During the seedling stage, it’s important to keep the soil moist but not overly wet. Overwatering at this stage can lead to damping-off, a fungal disease that can kill young seedlings.

It’s recommended to water your seedlings lightly, allowing the top layer of soil to dry out slightly between waterings. Even though it’s possible to germinate marijuana seeds in water, they can’t handle too much once they sprout.

What is the best time to water cannabis plants?

The ideal time to water cannabis plants is typically in the morning or early afternoon. There are several reasons for this timing:

  1. Maximizing Absorption: Watering in the morning or early afternoon ensures that the plants have ample time to absorb the moisture throughout the day, which is vital for their metabolic processes.
  2. Avoiding Fungal Diseases: Watering during these times helps the topsoil and foliage dry out before nighttime. Night is when the temperature drops, which can lead to condensation and a higher humidity environment—perfect conditions for fungal growth. By ensuring the plants are dry by evening, you significantly reduce the risk of fungal diseases such as powdery mildew or bud rot.
  3. Enhancing Photosynthesis: Providing water when the sun is up means that the plants can make the most of the photosynthesis process, which is at its peak during daylight hours.

However, it’s not just about the timing; the quantity matters too. The amount of water you provide should be adjusted based on the environmental conditions:

  1. Hot and Dry Conditions: During warm, dry spells, the plants will transpire more, meaning they’ll lose more water. As a result, they may need more frequent watering to stay hydrated and healthy.
  2. Cool and Humid Conditions: Conversely, in cooler, more humid conditions, the rate of evaporation from the soil and transpiration from the plant slows down. Thus, the soil remains moist for longer durations, and plants may require less frequent watering.


When it comes to watering cannabis, it’s important to consider factors like temperature, humidity, and the plant’s stage of growth.

By understanding the signs of overwatering and underwatering, you can adjust your watering schedule accordingly.

Finding the right balance is crucial for the health and growth of your cannabis plants.

Follow these best practices and you’ll be on your way to successful cannabis cultivation.

Happy growing!

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