Posted: 23/07/2013 at 12:46
Grape vines are very strong growers and need to be controlled or they will take over the whole greenhouse. The weblink from Dovefromabove at the top of the page tells you how the pro's do it. On that page there is also a link to training your vine into a standard which works well in a small greenhouse.
Do you know how old your vine is? I would suggest cutting off all but one of the fruit clusters this year to help the vine build up its strength first.
Do you know what variety you have? Knowing this will help you understand when the fruit will be ready and whether it is an eating variety or more useful for wine.