Depends on the size of them. I think Carolyn has posted in the past that she had used the 10 gallon ones - the heavy duty white ones with the handles. And there are pics in one of the current threads that Timmy posted showing his use of ProMix potting soil bags.

There are many different types and sizes of grow bags available. Did you have a particular one in mind?

Dave

PS: just occurred to me - are you talking about the upside down tomato growing set-ups? That's a very different animal. ;) But yes, if that is what you mean then there are several previous discussions here about them. Just search 'topsy turvey' and 'upside down'.

Here is a link that might be useful: Grow bags discussion..