I started 3 batches of wine in december. One was an 8 gallon version made with hibiscus, cinnamin, lemon and sweetened with the mexican sugar cones (added too much hibiscus for 5 gallons. Second was 5 gallon of Kiwi and the third was 5 gallon of cranberry. Cote des Blancs yeast in all. Kiwi started fast then stalled, Hibiscus was medium speed and steady and finished dry. Its in secondary now clearing. The cranberry was slow then stalled. Both the kiwi and cranberry stalled at about 1.050 for three weeks. I added half a package of turbo yeast to each. In the cranberry it took off within half hour and was fizzing for a week until I had to take it outside to cool to stop the fermentation, very cloudy for now. Need to rack to secondary to see if fermentation continues. Kiwi is still dead. I'll back sweeten the hibiscus and cranberry and should be good.
I also used the turbo yeast last year in a 5 gallon batch of hibiscus I was demonstrating to a guy we were working with. He always wanted to try make some wine so I brought over all the ingredients and since we had about two weeks till we finished the project. Dumped everything into a 5 gallon bucket with an airlock in the lid, in the morning. In the evening dropped bag of turbo, by next morning was bubbling. Threw it in the fridge 3 days later to stop fermentation. I left for a few days to another project and told them to wait a couple of days to taste, get the yeast to die down. When I came back nobody would say how it turned out but it was gone, between 6 guys.
It can be used but it's a bear to stop fermintation