I have a small division of the same clone. It's quite slow growing but otherwise is doing fine. I'm growing it under lights at room temperature and haven't been keeping it super wet. I wouldn't worry about it too much unless it's showing signs of stress. Did you get yours from John Marcotte?
I got this last fall when Mrs Perner came to town. We've had unseasonably cool temperatures so it hasn't really been tested yet. It had a spectacular root system. Bareroot it looked like a string mop.
I'm having trouble with mine, especially establishing them out of flask. Can you tell me a bit more about how you're growing them - humidity, watering frequency, etc? Thanks.