My first wine was a 3 gallons of cranberry. I used 8 lbs berries, 8 lbs sugar, 3 gallons water, 2 1/2 tsp yeast nutrient, 1/2 tsp k-met and montrachet yeast. Usual procedure, boil the water and pour it on the berries and sugar. Wait to cool (SG 1.086) and add the sulphite, add yeast 12-24 hours later.
Took forever to ferment. The book I was going by--Winemaking by Stanley Anderson, this was back in the 90s--gave me fears of horribleness if left in the primary too long so I racked at 1.06 after 2 weeks. Fermented slowly for the next 2 1/2 years, with only (2) 1/4 tsp additions of nutrient and 2 rackings. Finally got the SG down to .990. Bottled about 3 years after starting. Turned out really nice--no off flavors from being on the sediment too long. The cranberry tartness went well with poultry.
If I was going to do it again I would add a can of OJ concentrate. I've never tasted any OJ in my finished blueberry wines and it ferments well. OR, keep adding nutrient in the primary when fermentation slows and stir daily. And keep it warm, of course.
Randy