A Winegrower only chooses the most sunny hills of the surrounding area to cover them with the comforting green of the vines. That's how the vineyards produce full fruits that make for a much better harvest.
Note:
Every level of the Winegrower increases Wine production by 2% per expansion (only in the town it is built).
Research and Reduction Building bonuses are shown in the following charts by mousing-over over the research abbreviations (P – G – SL – MR) in the chart.
You can mouse-over the letters in the "Minimum " column to see how many Warehouses are needed for that level.
You can also mouse-over the numbers in the "Build " column to get the longer version of what the numbers/Letters represent.
These reductions are separate and in addition to the researches, for up to an additional 50% reduction. providing a minimum of 64% reduction in resources.
An Architect's Office reduces requirements by 1% for every level built. (up to 50%)
A Carpenter reduces requirements by 1% for every level built. (up to 50%)
A Firework Test Area reduces requirements by 1% for every level built. (up to 50%)
An Optician reduces requirements by 1% for every level built. (up to 50%)
A Wine Press reduces requirements by 1% for every level built. (up to 50%)
These increases are separate and in addition to the production buildings, for 7 day increments, making the maximum possible increase in production 172%.