In a big bot, add the water and all the ingredients. There is no need to take the skin off the garlic, just separate the bulbs. Throw in your herbs stems and all, just give them a good wash before hand.
Bring the works to a boil for 15 mins and turn it off. Set it aside to cool before you put the turkey in it. Add the turkey to the cooled liquid and leave it there for at least 12 hours.
Notes
You will need a big brining bag or a big bucket to put your turkey in with the brining liquid. But it needs to be able to fit in the fridge.