Spring sprung but some of the vines did not. After scratching our heads for a bit we realized that one day in November went from 75F. to 25F. in one night. Our vines were not dormant yet so we lost about 25%. Luckily this was in a very specific elevation. Many of them bounced back, but most remain sticks in the ground. We will replant, but we need to come up with some solutions. One of which is to force the vines into dormancy a bit early by cutting back the water. Once they