I have grown them from my own stored roots for years now. Generally, when trying a new variety I have gotten it either from Sandhill Preservation or Duck Creek Farms (The two best sources, in my opinion).
This year I got my Oklahoma nursery license and have started raising slips to sell. So far, so good!
I'll try to post some pictures from when I started them to sprout and what they look like now.
Will also post a link to a guide I did, as a hand out.
George
Tahlequah, OK
Before
April 4, 2014
P { margin-bottom: 0.08in; }A:link { }
https://dl.dropboxusercontent.com/u/...20potatoes.pdf