Nature's Notebook Program
The is a natural phenomena monitoring program of the USA National Phenology Network. It allows citizen scientists in making observations on plant, animal, and hydrological phenomena. By participating in one of their regional campaigns you can help researchers answer key questions, get info-rich emails with localized results, and an end of season summary. There also two campaigns observing cloned and common varieties of lilacs.
To learn about the Nature's Notebook program go to https://www.usanpn.org/natures_notebook