A word about the bloom time chart:

This is a mullti-year chart that compares bloom times since 2005; it is ongoing.
The chart uses the standard Arboretum Locations keyed to the Map on this web site. Some of the plant names are incomplete,  but I thought it would be useful even in its present state. The question marks are not indications that the plant listed is not correct, it simply indicates the need for more specific information. In the future, I hope to link the chart to annual weather reports so that one can see the effect, if any, of spring onset times and temperatures.

I update the chart from filed work once or twice a week during the season and will post these updates on this web site every few weeks. The question marks in the spreadsheet do not indicate that the identity of the plant is not correct; because this is a work in progress, the question marks let me know that there is something regarding the nomenclature that needs checking.