No need to soak them first but remove any mouldy or bad fruit. Also don't generally add them after fermentation has completely finished but near the end. For example SG of around 1010 if say you started at 1080. Whilst the fermentation is still active the yeast will be still dominant and this helps prevent bacteria or other yeasts gaining hold.
Once fermentation has finished you will need to ensure your sulphite levels are at the right level. 1 crushed campden tablet per gallon or 5ml of 10% sulphite solution regardless of whether you add fruit late or not.
In your case where the wine has finished fermenting if you do add them add the sulphite at the same time. I think I would probably seprate into 2 batches if doing this. I would also add slightly more sulphite and then rack in a week or so and then in month without further sulphite addition.
Once fermentation has finished you will need to ensure your sulphite levels are at the right level. 1 crushed campden tablet per gallon or 5ml of 10% sulphite solution regardless of whether you add fruit late or not.
In your case where the wine has finished fermenting if you do add them add the sulphite at the same time. I think I would probably seprate into 2 batches if doing this. I would also add slightly more sulphite and then rack in a week or so and then in month without further sulphite addition.
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