Quote Originally Posted by Whos Carl
It should say on the packaging you get with it from the supermarket.

OR you can neverbe sure. It should be white thats all you can tell.
LOL, The weed I get actually does has a label on the "packaging" stating the strain, weight, etc.

Carl is right though, you really can't tell. I get my weed from a medical marijuana supplier so I can be sure I'm getting what the label says it is. If you're just getting it from some random dealer, however, unless you're sure he is real close to the grower I'd be wary of paying high prices for any particular strain. You'll never be able to tell just from looking at it. I've gotten white widow several times and each time it looked a bit different. The look has as much to do with how its grown, dried, and cured as much as it does the specific strain.