If they are very tiny and on the undersides of the leaves,then they are Mites!!!!!!!! Get some Neem Oil. Are they very tiny?

Ga Grown!
GaGrown Reviewed by GaGrown on . Small Black Bugs I got these really small black bugs on my weed plant its hard to see them you have to get up close but there on the leafs i have only seen two but are they good or bad for the plant and if there bad how do i get them off for good??? Rating: 5