Bletilla striata in zone 3b?

[icedtea2008]

I got this orchid as a freebe from the greenouse where I work. I had asked our horticulturist about this plant after a customer asked me about it, but left before I could get an answer. Dave (the hort.) told me it was a Bletilla orchid, found nativly outside in China and Japan. He said it is hardy for our area, produces purple hyacinth like blooms, and had been at the greenhouse scince they first got orchids their in like 1982, and told me to take it.

I have no idea how to care for outdoor, perennial orchids (i.e. what kind of soil, sunlight, winter protection, ect.) and from what i've seen on the internet it looks like Bletilla striata. Does anyone know if it really is hardy for my zone, 3b? Our winter nights can get down to -40 F. under several feet of snow... how do i care for this little guy?