I agree with grey; pyrethrins are a pretty simple and foolproof way to deal with infestations.
Keep the gnats from returning by taking away their nice wet homes- standing water in drip trays, muck under pots- they love that. So keep your grow area nice and dry, and they won't be interested in residing there any more.
stinkyattic Reviewed by stinkyattic on . little black flies. i just looked in on my plant and noticed some small blackflies around it.:mad: does anybody know what they would be ? and what would be the best way of getting rid of them. thanks... Rating: 5