Global Warming and Daylilies

Each year for the past 25 we have monitored the date of first bloom measure as the day of the bloom from January 1 of that year. We present the results up to 2015 below.

There is a downward slope on all, meaning an earlier bloom date, and thus a trend of warming for the past 25 years. However there are micro-environment issues as well as "weather" versus climate issues as well. The trend is there however.