In 1999 we started asking our members to fill out bloom charts showing when their clematis bloom. Filling out and returning the chart(s) helps us to understand more fully which clematis thrive and in which areas. This will help us in our quest to correctly identify in which USDA Zone specific clematis should be assigned.
If you would like to participate please download the Bloom Chart PDF below.
Via US Mail
American Clematis Society
c/o Edith Malek
P.O. Box 17085
Irvine, CA 92623-7085
Or via email