Oh, yes, I get very nice cascades and decent hallertauer. The plants are about 4 seasons old and I got about 2 pounds (dried) this year off of the one cascade rhizome.
They grow FAST once they poke out of the ground at the end of May. A little frost doesn't seem to hurt them after that. Our last frost is around Father's Day. We get frost again before Labor Day, but usually pretty light. In early September, the evenings are cold but the light frost then doesn't seem to hurt them, either. I harvest them around the first or second week of September.
Here's a picture, taken on August 13 this year:
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