How often should I water my plants, and how much should I give them?
This is another difficult question to answer as it depends on so many other factors, like whether you’re growing in the ground or in containers, what the climate is like, how large the plants are, and what stage of development they’re in. Cannabis is a moisture-loving plant that requires plenty of water to keep up with its needs. It’s nearly impossible to overwater when growing outdoors in the ground, unless you’re already growing in a swamp. However, when growing in containers, you must be careful not to over-saturate them, as it could lead to fungal infection and disease. You can reduce the risk of over-saturating by using high-quality growing medium and making sure that your containers have holes in the bottom for drainage.
Print this page
Container size is another factor. The smaller the container in relation to the plant, the more often you’ll have to water. Try to provide at least one gallon of growing medium for every foot of vertical growth.
As for knowing precisely when to water and how much, there’s no formula. Trial and error, and practice, will teach you how to listen to your plants and know when they need water. If they start getting limp and drooping, you obviously need to water. After you do, pick up the containers and feel their weight. In time you’ll learn to tell when they’re getting low this way. When you’ve been growing a while, you’ll begin to get a feel for your setup and will almost instinctively know when it’s time. There are also several probe-type moisture meters on the market that can help.
When you do water, fully saturate the growing medium until excess water begins to drain out the bottom of the container. This ensures that no dry spots are developing in the soil. Poor soil is generally muddy and tends to clump up, holding too much water for the roots to get the oxygen which they must have. High-quality soil is more fibrous and holds just what the plant needs, allowing the excess to drain (hence the holes in the containers).