Bob - thanks for the information. It helps.

On your question of what I'm planting.... My farm is in central PA, atop a
small mountain (big hill) overlooking the Susquehanna River. The farm
benefits from some temperature moderation from the river. I haven't
selected the specific varieties, but hope to do about 8 different varieties
of 10 vines each. Six will probably be FrenchAmerican, with a bias toward
those suitable for red wine. I'd like to try a couple vinifera varieties
(cab, merlot) as I think the proximity to the river will give me some help
in creating a good environment for the vin's.

Thanks,
Paul