The simple answer is slowly and without disturbance! Native to volcanic and limestone cliffs in the USA states where it is found, it can make a stunning plant, but it is pretty difficult in cultivation. Prone to overwatering and scorch and not often flowering to its full capacity in cultivation.
A forumist in Austria used to grow it outside. Seedlings, should you be fortunate enough to raise them, should not be allowed to dry out. Growing in tufa is a good idea if possible. Very slow growing and not at all easy and Ian and I managed to kill a large one we inherited at one point so my advice is not great!
http://beta.floranorthamerica.org/Kelseya_uniflora
