Cannabis 101: Checking Out Trichomes | You know you’ve likely got some good weed if it’s covered in trichomes. These are the little white mushroom-like things that stick to your weed and is commonly called kief, particularly when collecting it from a grinder. Trichomes grow on plants and protists, or microorganisms. Cannabis trichomes are the part of the bud that gets you high. Having lots of them means quality weed.