Blue Rose Of Sharon? Has anyone had nouns with the blue interpretation of the rose of...

Has anyone had nouns with the blue interpretation of the rose of sharon in zone cold as 4?
Why do English perenniel gardens do so in...
Answers:    I live in a cold zone 5A. It lean towards a zone 4. Rose of Sharon does fine. In a zone four I would plant it in a place that get a little bit of shelter from the loop. A wall, near taller shrubs or trees, etc... and it should be OK. Denise http://thegardenersrake.com
I simply get a gardening career today and...
I assume it's an up grade from the Purple Rose of Cairo, but I don't presume it can match the Tulip of Toledo next to the new Pentium chip.