Given that I’m in a late frost climate, I was hoping that if I planted a peach tree on the north side of our house, I could delay blooming. However, I do not feel that has helped delay blooming at all and may be an old wives tale. I actually have two peach trees, a contender that gets at most an hour of sunlight in the winter, and an Elberta that gets a lot of sunlight in winter. They are now borh blooming in unison. I’ve also looked around the neighborhood and other peach trees are now blooming as well. In addition, I have two apricots blooming at the same time even though they received dramatically different amounts of sunlight in the winter.
Bottom line is that I’m really not buying into the idea that where you plant your trees can affect when the tree blooms. Mulching has not made any difference either in bloom time. Last year, my peach trees, along with the neighborhood’s peach trees, bloomed together. Last year we also had a mild winter and the trees bloomed several weeks earlier, but still all at the same time!
I just wanted to share my highly scientific, annacdotal observation.