Grapes grow on the vineyard plots, which open with the Vineyard technology (55 green). Planting plain Grape Seeds takes Farming mastery 12, two-star seeds 14 and three-star seeds 16. The vineyard grows better than a garden bed: its growing skill starts at 6, where a garden bed’s is 2.
Grapes are for pressing: 6 of one grade and an Empty Bottle make a Grape Juice of that grade at the Vine Press, which the Wine Barrel turns into Wine. Both steps need the Winemaking technology (175 green, 20 blue). Raw, a bunch gives 6 to 8 energy.
Each item is studied once, on the Study Table. Studying does not use the item up. With the Scientist perk, a 30% chance of a Story.
Notes
The Brewery sells plain grapes at every tier (15, 20, then 30 in stock). Grape seeds come from the Brewery, Herm at his third tier and the Trademaster.
Each grade is studied on its own; plain grapes cost 5 Science and give 20 green and 25 blue.