How to Know When to Water Cannabis Plants

Proper hydration is crucial for healthy growth and high yield of cannabis plants. However, many growers struggle with determining the right time to water their plants. Underwatering and overwatering both have negative impacts on the plant's health and productivity. In this article, we will discuss how to know when to water cannabis plants based on their individual needs and environmental conditions.

Observe the Soil Moisture Level

The most common way to gauge the water needs of cannabis plants is by checking the soil moisture level. The soil should be moist but not waterlogged. Insert your finger about an inch deep into the soil, and if it feels dry, then it's time to water the plant. If the soil is still moist, wait another day or two before watering. Overwatering can lead to root rot, which is a fungal disease that affects the roots, leading to stunted growth and wilting of the plant.

Consider the Plant's Age and Size

The age and size of cannabis plants also play a role in determining the watering frequency. Young plants require less water compared to mature plants. For seedlings, water them once a week, and for vegetative plants, water every two to three days. However, as the plant enters the flowering stage, the watering frequency should decrease to once or twice a week. Large plants with a bigger root system require more water compared to smaller plants with a shallow root system. Therefore, adjust the watering schedule accordingly based on the plant's age and size.

Check the Temperature and Humidity Levels

The environmental conditions such as temperature and humidity affect the water needs of cannabis plants. High temperatures cause the soil to dry out faster, leading to increased watering frequency. On the other hand, low humidity levels cause the plant to transpire more, leading to increased water loss. Indoor growers can use a hygrometer to measure the humidity level and a thermometer to check the temperature level. Adjust the watering schedule based on these readings to maintain optimal moisture levels.

Use the Pot Weight as an Indicator

Another way to determine the watering needs of cannabis plants is by using the weight of the pot. Lift the pot when the soil is dry and make a note of its weight. Water the plant until it runs out of the drainage holes, and wait for about half an hour for the excess water to drain out. Lift the pot again and compare its weight to the dry weight. If the weight has increased significantly, it means that the soil is saturated, and the plant does not require water yet. If the weight has not changed, it means that the soil is too dry, and the plant needs water.

Conclusion

Proper watering is a critical aspect of cannabis cultivation that every grower should master. Overwatering and underwatering both have negative consequences on the plant's growth and yield. To know when to water the plants, observe the soil moisture level, consider the plant's age and size, check the temperature and humidity levels, and use the pot weight as an indicator. With the right watering frequency and technique, you can ensure that your cannabis plants receive the optimal moisture levels, leading to healthy growth and high yield.