dirty heads, and thc glands and contaminents
mine is a late harvest, the earlier the harvest the whiter it would be, the drier and colder the starting material the clearer
cannabanoids mature as apart of the plant dying these cannabinoids change states based on the ratios present and produce the vararing quantities and percentages of derivative cannabinoids present in the final product. but all in all the rules of thumb are, pull early, freeze right away keep clean and cold, you even sift it cold