Before planting my vineyard, I found myself scouring websites like wikipedia in search of the perfect rootstock and vine for my soil characteristics and microclimate. Eventually I got fed up with this haphazard approach and decided to create a database that would allow people like you and I to effectively search for that perfect varietal. That database is... Vitibase!
The data in Vitibase is populated by users like you. I read your emails and comments, and update the database accordingly. While I cannot guarantee the accuracy of all of the information, I generally try to verify your facts with at least two other sources. I suggest that you only use this data as supplimental information when selecting a varietal for your vineyard. Nothing compares to talking with local growers and experimentation.
I hope you find the site useful and I hope it puts you one step closer to a successful harvest!
Cheers,
Steven Hashagen
P.S. If you're interested in becoming a vitibase contributor, please contact me. I could always use help populating the database and keeping it accurate and current.