My grapevines are hitting bud burst earlier and earlier every year. I'm in the southern hemisphere. This year they started on August the 24th meaning spring had not began and I'm still getting frosts. This year happened to be the coldest and wettest winter I have ever experienced. These two things mean my vines are fucked the frost has nuked their shoots.

Bud burst is meant to be triggered by the warming when coming out of winter. We had one moderate day with a max of 18 celcius after a storm which dropped 140mm of water in two days and boom new shoots triggered. Then the frost hit them 3 days in a row. In my opinion this shouldn't be enough to trigger it. Most of my friends vines went between the 26-30th of August after having a frost in the morning. Why is this occurring during the coldest winter in memory? We had record snowfall this year not seen in over 100 years. In some places it snowed where it had never snowed before so why did my vines shoot?