Q.juice coming out of blackberry vine
I trimmed my blackberry vines back and they started to bleed a lot of juice out of the stem. Is that clean water or what coming out? These vines are about 1 inch thick down to 1/2 inch thick. It looks like clean water to me. I was just wondering if I could taste it safely. Thanks

Pruning is generally done when the plants are dormant.
Your plants are producing sap from the pruning cuts since the plants are not dormant.
This article has proper pruning techniques.
https://www.gardeningknowhow.com/edible/fruits/blackberries/blackberry-pruning.htm