i have grown cukes, and melons vertically for years. works great and uses much less space.

I guess my hanging 5 gallon bucket planting is considered vertical gardening. I drill about a 1″ hole in the bottom of the bucket, cut an X across the hole for ease of inserting the rootball and fill with potting soil. Drilling extra holes for drainage is a good idea. I have also used cutouts on the side to add cucumbers in the same bucket as my tomatoes.

We’re going to try this out:

I’ve grown pumpkins this way and it’s pretty cool as they take up far less space.

There is a vertical gardening forum over at the gardenweb site.