Our pink flowering plum with double flowers started blooming yesterday, February 13, 2017. This is Prunus blireiana. This tree always blooms in the first half of February, having bloomed on the 15th (2009), the 4th (2011), the 2nd (2012), the 15th (2013), the 3rd (2015), and the 5th (2016). I don't have dates for 2010 or 2014. This year the birds left the buds alone, so it looks like we'll have a tree full of flowers. In some past years, sparrows and House Finches have eaten the buds before they bloomed.