FROM WHAT I READ THIS YEAST WORKS VERY WELL WITH BLACKBERRY. BUT THIS YEAST REQUIRES HIGHT NITROGEN NUTRIENT ADDITIONS TO AVOID THE POTENTIAL DEVELOMENT OF H2S. WHAT EVER THAT IS? IT DID NOT SAY HOW MUCH NITROGEN NUTRIENT TO USE. IS THIS THE SAME AS YEAST NUTRIENT? THERE WAS SOMETHING ABOUT FERMAX, I THINK THATS RIGHT DONT KNOW WHAT THAT IS EITHER. CAN SOMEONE HELP ME HERE?