Typically, higher-quality marijuana ashes lighter in color and lower quality stuff ashes darker.

One aspect of growing that can influence ash color is the flushing process. Around 2 to 3 weeks before harvest, growers will stop feeding the plant nutrients and only give it water. This allows the plant to flush out nutrients and contaminants, leading to better-tasting bud.

If plants aren’t flushed properly, you will often see evidence of the residual contaminants in the form of dark-colored ash.

If your burnt bud leaves behind white-colored ash, as seen with King City Garden’s Blueberry Muffin Imperials, you will know that the nugs likely contained minimal contaminants. They were probably flushed properly and they probably tasted good.