I may have figured out how to delay the flowering of the Flavorella plumcot and would like to confirm if someone else has noticed the same. I need to repeat this.
Flavorella plumcot is one of my favorite stone fruits but it is very problematic to have production that even Andy Marianni took out his commercial plantings of it. The main problem is that it blooms too early, very early in fact that it always blooms when we have weeks of rains in late winter, around Mid to Late February. It blooms early because of its low chill requirement and some also suggested that the very cold temperature doesn’t help in pollination as the pollen tubules are slower to grow and the fact that the pistil of Flavorella is longer than most plums and apricots.
So the fruit set is always very poor. Most years, it doesn’t bear fruits at all. But when it bears fruits, you won’t be disappointed. It is like the Santa Rosa Plum with a yellow skin, and much better tasting.
So I’ve been grafting it on various rootstocks and stone fruits to see if I can delay it’s flowering to much later past the rainy season of California. And this year, it may have paid off, the most promising is a graft on a Babcock White Peach. It has bloomed at a week later than the peach, like blooming along with my cherries. It seems that grafting a low chill cultivar on a compatible higher chill cultivar will delay the bloom of the former when slightly more distantly related.
And it created a minor problem, the usual pollenizer which is Royal Rosa has bloomed already. So I might graft the Royal Rosa to the peach or to the Flavorella plumcot itself. I need to repeat the graft on other peaches. Grafting it on to the plums or plum rootstocks makes it bloom at the usual time, very early.