requirements for vines placement:
- Grapevine Placement Tool
- Vinyard Deed

requirements for wine making:
- Yeast
- Sugar
- empty keg
- empty bottles
- label making tool

"Mignon the Winecrafter" is just outside the moongate from 'Yew Bank'. Buy from him
all the requirements you need. Yeast, bottles and Sugar stack, all other components don't.

I'm not sure if the rule applies here that vines can be placed within x squares of your
house, cause i didn't test it. I used the Vinyard Deed to place dirt tiles on top of my
castle. using the vinyard deed you select a start- and end point (X,Y), and anything
in between those two points will turn into dirt tiles.
 
Use the 'Grapevine tool' to place start and ends, and in between- on each tile a vine branch.
If you desire another grape variety, the gump (left bottom) gives you a choice of 11 types.

You collect grapes from the vines by simply double clicking each vine. The start and ends will also
give you grapes, so don't forget to harvest them aswel. You can sort of indefinitely harvest grapes
when you have around 30 vines. The yield will be low, so harvesting every few hours will probably
yield more grapes for your efforts. The 'high end' grapes can give you failures when trying to harvest them.

In order to make a keg of wine you need 50 'bunch of grapes', and the more fancy the wine
is, the harder it will be to make a keg. If you fail in making the keg, you loose all 50 grapes.
If you manage to make an exceptional keg, it will be of 'special reserve' type and the wine seller will pay more for these types of bottles.

Below are the different types, and the required alchemy skill to make a keg
Cabernet Sauvignon Grapes: 80.0
Chardonnay Grapes: 80.0
Merlot Grapes: 80.0
Pinot Noir Grapes: 80.0
Zinfandel Grapes: 80.0
Chenin Blanc Grapes: 85.0
Riesling Grapes: 85.0
Sangiovese Grapes: 90.0
Sauvignon Blanc Grapes: 90.0
Shiraz Grapes: 90.0
Viognier Grapes: 99.0

If you have a 'Label making tool' in your backpack (and used it to choose a name for your winehouse),
your keg and bottles will be labeled with your own 'brand'. The tool has to be in your backpack in order to name anything you produce.

Your kegs need 7 days to ferment and produce quality wine. After 7 days you can poor the keg into empty bottles and booze up or sell them.