I have an opportunity to purchase either/both Bletilla ochracea and Bletilla Yokohamo 'Kate'. I have never grown either. My understanding is that ochracea does well in zones 7-8 and 'Kate' in zones 6-10. Their flowers are completely different and the 'Kate' has a much taller scape. As you have pointed out, oshracea does grow in zone 6. I wonder whether the ochracea does well in zone 9/10 or whether the plants need more cold to go dormant. Questions, questions.
