Popcorn buds refer to airy, fluffy, and undeveloped buds found in a harvest. As the name suggests, popcorn buds take the size of popped corns. Popcorn buds are usually found at the bottom of a cannabis plant. Their location plays a big role in determining their size, as the bigger plants prevent light and other nutrients from reaching them. Popcorn buds are caused by various factors, with the major one being stress. So what is stress in cannabis cultivation? We will discuss that shortly.