Yield: Wine

According to various sources, making wine averages between $1 and $3/bottle. My favourite bottle, Chateau St. Michelle Riesling, costs $7 on the west coast and $15 on the east coast. The Kniffen System of pruning, detailed in the ubiquitous Backyard Homestead, will produce 8-12-15lb of grapes per year per plant [depending on whether you read page 104 or page 106]. Page 106 tells me that I need 11-12lb of grapes for 1gal of wine. A gallon is 3785ml or slightly more than 5 average 750ml bottles of wine. At a rate of one bottle per week, I'd need to make 11 gallons of wine and so would need 13 plants [Rounding up to be safe]. This is of course after the plants reach maturity, 3 years after planting. The first two years yield nothing but mulch.

Further reading [suggested in TBH]: From Vines to Wines - Jeff Cox; *The Home Winemaker's Companion - Gene Spaziani and Ed Halloran; Making Wild Wines and Meads - Pattie Vargas and Rich Gulling; The Winemaker's Answer Book - Allison Crowe;