Posted: 08/07/2014 at 14:37
That breeder's rights rule applies to propagation for sale, not to private gardeners increasing their own stock. The best time to divide plants is either autumn or spring so wait a bit.
My winters usually get to -25C though I have had -32C. It's usually the winter wet that kills plants rather than the cold and a blanket of snow is also better than getting that cold with no protective covering. Echinaceas are American prairie plants. A wet Belgian winter is more damaging than a cold, dry or snow covered prairie winter.