raspberry

What are the requirements for growing this "frost-resistant stevia"? I had the Sweet tea Tian-cha made from dried R. suavissimus leaves and it was delicious. How do they taste fresh from the garden?:D...

I'm looking to get some new varieties of raspberries. I planted some last year but they bombed due to exceptionally low soil pH (now corrected). So in an effort not to spend an arm and a leg two years in a row... anyone able to spare a few for the spring?