As your cannabis grows, you are bound to notice that the plants will undergo a natural increase in height which is called stretching at one point or the other during the switch from vegetation to flowering. This process occurs to prepare the plants to support the buds once they show up. Though it is a natural occurrence that lasts not more than 2 weeks at the beginning of flowering, it still needs to be managed to prevent it from going out of control which might result in an overcrowded grow room and scraggy-looking, unstable plants.