What is the best ti.e of year to visit the winery?

I'm not sure there is a "best time". Summer is the best time if you want to explore the grounds and take advantage of the concerts, but it's a *lot* more crowded during these times. Mornings have less crowds. The bad weather days are my favorite though, since there's less crowds and you get better service because of it.

During the summer they have a weekly music concert series there and their grounds are nice for picnics