When it is a whitecurrant?
Dunno, but I planted 3x redcurrant bushes two years ago, and in the first year I got a few strings of redcurrants which were promptly pinched by the birds. But they were definitely REDcurrants.
Last year the bushes produced quite a lot of berries, and because they were in a fruit cage now, they survived.
Actually they survived until they went rotten in December, because they stayed translucent white all the time. I left them on in the hope that they would turn red.
Although they were fed on well-rotted horse muck, I presume this is a mineral deficiency or something similar? Any ideas out there?
Don't know the answer, but redcurrant and whitecurrant are cultivars of the same species and I think the variety Red Lake can even produce both red and white/pink berries at the same time.
So I wouldn't assume that it was necessarily a mineral deficiency.
I think maybe they are kind of interchangeable sometimes. When I made whitecurrant jelly a few years ago, it came out a very dark pink, even though the berries were all translucent white as "normal". Maybe the temerature has something to do with it - keep them cool and they stay white, heat them up and they turn red?