The rate of grape growth varies greatly with growing conditions, season length, and variety vigor. With good growing conditions and our long season we can easily get 8-10ft cane extension per year and could push them with water and nitrogen to double that.

For average conditions figure 8ft per year and one plant occupying about 8x10 = 80 sq ft.

Thank you! Is that the type of growth we should expect from a newly planted vine or one that is quite a bit more established?

I think fruitnut's post contained an implied invitation to give us a little more information on your climate and growing conditions.

If you plant a grape in spring of 2013 it should be able to cover a trellis in 2015 and go nuts after that. The first year will probably be just getting established.

I suggest planting one year bare rooted vines. You should trim the roots at planting anyway. I got 24 feet across- top and bottom wire in 11 months using Florida-bred bunch grape hybrids. What zone are you in?