MAXWELL ARBORETUM BLOOM TIME CHART
⇒ Excel Version 2005-2020 (you can download this and sort the fields as you like)
A word about the bloom time chart:
This is a multi-year chart that compares bloom times since 2005; it is ongoing.
I update the chart from field work once a week during the season and will post these updates on this web site as time allows.
The Bloom Time Chart now includes the average bloom date for each plant based on the past 15 years of data.
The extremely early and late springs of recent years are reflected in the data.
Late May/Early April