If you are going to get dry mouth, you will usually get it during the peak effects of your buzz. It can even last as long, up to several hours, depending on how stoned you are. How you use weed matters too. Smokers will usually get it within the hour. If you eat it, such as with edibles, then you might not feel cottonmouth for a while. However, when you do, it will typically last longer. Much longer. 

To know more, visit: https://bit.ly/3laB5wW