|Resource, Luxury good|
|Continental and Mediterranean|
|Gathering camp and Farm|
|Natural patches and Fields|
The natural patches seem to be quite loose but still more densely packed then Apples, and a typical patch can be fully exploited by a single gathering camp.
The gather rate for natural patches lies between XX and XX
The Gather rate for fields lies between 0.1 and 0.2 the gather rates seem to match the gather rates for other crops found in the chart of Field
The fields however are exploited more efficiently by the Gathering camp compared to food crops, allowing twice as many fields.
Here is a chart with the biomes grapes can be found and grown in.