Blossoms in High Park usually reach peak bloom between late April and early May. As you can see from our Peak Bloom Records below, the date varies year by year as it is a temperature dependent process. In 2016, there was no peak bloom due to unpredictable weather patterns during the winter and early spring.
As of April 20, our peak bloom prediction for 2017 is between April 24 – 25. Weather patterns over the next few days will vary which could accelerate or delay blossom development. Stay tuned for more info as we will be updating the site on a daily basis.
The blooming period begins when 20% of the cherry blossoms are open and ends when the petals fall. “Peak bloom” starts when at least 70% of the blossoms are open. Once open, flowers last from 4-10 days, depending on the weather conditions. Cool, calm weather can extend the bloom period, while warm, unsettled weather can shorten it.
Blossom development is a temperature sensitive process. Warm weather encourages cherry trees to bloom early, while cooler temperatures delay bloom time. It is difficult to predict peak bloom more than 10 days in advance because it is so dependent on weather conditions.Click on chart to the left to see how temperature and bloom dates correspond.
The “Bud to Blossom” Timeline
Predicting peak bloom can be difficult, but as buds start to open you can estimate when the flowers will bloom. Check out the images below for the stages of blossom development.