Many Campanulas grow well in USDA Zone 4 (see USDA Zone Information)
(Zone 4a - Average minimum Temperature -25 to -30 F (-31.7 to -34.4 C)
Campanulas do very well in Zone 4a
Created by mike.
Last Modification: Thursday 21 of May, 2009 12:26:37 CDT by mike.
The original document is available at http://nargs.org/nargswiki/tiki-index.php?page=Rock+Gardening+in+Zone+4