During the growth, Believe everyone had encountered this problem. Stem breaks can come from a number of things: when you training your plants, you might be snap the stem, dropping something on it, dogs or cats, bad weather. No matter how it happened the most important thing is to not panic. It is easy to fix this problem.
Solution：Fixing stem breakage is not really a problem. Splint break stem with small sticks or small board and tape it in place. Cannabis has a great ability to come back even after a stem break. Giving her a week or so, she will recover and start to grow again. Next time when you watering or feeding her be careful!