A vineyard is where there are millions of plants which are used to make wine. A vineyard is a place. It is where grape vines are planted. There are also cities in California, Florida, Utah, and New South Wales named Vineyard.
There is no standard collective noun form the noun 'vineyards', in which case a noun suitable for the situation is used, for example an itinerary of vineyards, a cooperative of vineyards, a collection of vineyards, etc.
If it means one weaver's vineyards then it would be Weaver's Vineyards, but if it was multiple weavers then it would be Weavers' Vineyards. Or if it was just Weavers as a name, it would be Weavers Vineyards.
Almaden Vineyards was created in 1852.
Windsor Vineyards was created in 1959.
Cristom Vineyards was created in 1992.
J Vineyards was created in 1986.
Markham Vineyards was created in 1978.
Wente Vineyards was created in 1883.
Kistler Vineyards was created in 1978.
Schramsberg Vineyards was created in 1965.
Alban Vineyards was created in 1889.
Trefethen Vineyards was created in 1968.