Avg. Customer Rating:
Location: london, KY
Hardiness Zone: 6
This is a rose undeserving of the Knockout name. It is leggy and weak looking!
Reviewed on Jun 05, 2010 at 11:12:46 AM PDT
Location: Park Hill, OK
Hardiness Zone: 7
Rainbow Knockout is suseptable to leafspot and mildew, unlike the other Knockouts that have few problems. Try Blushing Knockout as a replacement, almost same flower color.
Reviewed on Nov 06, 2008 at 11:40:03 AM PST