Not an easy one Chuck according to literature and experience by others. I am searching for this one for quite a while myself, but they are still very expensive. I had a little chat with people from Fraser Thimble Farms in BC last winter. They succesfully grow this one and have it for sale. Their mix is peaty/sandy therefore on the acid side. It needs a long period of 'dry' dormancy in their climate. They cover the plants in september already. So keep the moisture levels down to a minimum in the fall to early winter.
I know German plantsmen who succesfully have raised montanum from seed into flowering plants planted in the garden. I guess you might have more success when having seedlings that will adapt to your growing conditions rather than a mature acquired plant that needs to adjust its growing behaviour because of the changed conditions. Not to speak about wild specimens that have probably no chance of survival when taken from the wild (which is a no no anyway) and than to grow in artificial (pot) conditions. So go for seedlings.
I am trying to germinate this one in vitro myself with seeds I obtained last winter. I gave a seed pod to a commercial grower too. Maybe they will have it for sale in a couple of years from now.
